secondaryTrack, referenceSwath.numberOfSamples * 0.5,
referenceSwath.numberOfLines * 0.5)
#it seems that we cannot use 0, haven't look into the problem
if rgoff == 0:
rgoff = 1
if azoff == 0:
azoff = 1
firstSample = 1
if rgoff < 0:
firstSample = int(35 - rgoff)
firstLine = 1
if azoff < 0:
firstLine = int(35 - azoff)
ampcor.setAcrossGrossOffset(rgoff)
ampcor.setDownGrossOffset(azoff)
ampcor.setFirstSampleAcross(firstSample)
ampcor.setLastSampleAcross(mSLC.width)
ampcor.setNumberLocationAcross(
numberOfOffsetsRangeUsed[i][j])
ampcor.setFirstSampleDown(firstLine)
ampcor.setLastSampleDown(mSLC.length)
ampcor.setNumberLocationDown(
numberOfOffsetsAzimuthUsed[i][j])
#MATCH PARAMETERS
#full-aperture mode
if referenceTrack.operationMode in scansarModes:
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(512)
#note this is the half width/length of search area, number of resulting correlation samples: 32*2+1
ampcor.setSearchWindowSizeWidth(32)
def run(frame1,
frame2,
orbit1,
orbit2,
formSlc1,
formSlc2,
imSlc1,
imSlc2,
infos,
catalog=None,
sceneid='NO_ID'):
logger.info("Calculate offset between slcs using ampcor: %s" % sceneid)
prf1 = frame1.getInstrument().getPulseRepetitionFrequency()
prf2 = frame2.getInstrument().getPulseRepetitionFrequency()
nearRange1 = formSlc1.startingRange
nearRange2 = formSlc2.startingRange
fs1 = frame1.getInstrument().getRangeSamplingRate()
###There seems to be no other way of determining image length - Piyush
patchSize = infos['patchSize']
numPatches = infos['numberPatches']
valid_az_samples = infos['numberValidPulses']
firstAc = infos['firstSampleAcrossPrf']
firstDown = infos['firstSampleDownPrf']
numLocationAcross = infos['numberLocationAcrossPrf']
numLocationDown = infos['numberLocationDownPrf']
widthSlc = imSlc1.getWidth()
coarseRange = (nearRange1 - nearRange2) / (CN.SPEED_OF_LIGHT / (2 * fs1))
coarseAcross = int(coarseRange + 0.5)
if (coarseRange <= 0):
coarseAcross = int(coarseRange - 0.5)
grossRg = infos['grossRg']
print("gross Rg: ", grossRg)
if grossRg is not None:
coarseAcross = grossRg
time1, schPosition1, schVelocity1, offset1 = orbit1._unpackOrbit()
time2, schPosition2, schVelocity2, offset2 = orbit2._unpackOrbit()
s1 = schPosition1[0][0]
s1_2 = schPosition1[1][0]
s2 = schPosition2[0][0]
s2_2 = schPosition2[1][0]
coarseAz = int((s1 - s2) / (s2_2 - s2) + prf1 * (1 / prf1 - 1 / prf2) *
(patchSize - valid_az_samples) / 2)
coarseDown = int(coarseAz + 0.5)
if (coarseAz <= 0):
coarseDown = int(coarseAz - 0.5)
grossAz = infos['grossAz']
print("gross Az: ", grossAz)
if grossAz is not None:
coarseDown = grossAz
coarseAcross = 0 + coarseAcross
coarseDown = 0 + coarseDown
logger.debug("Gross Across: %s" % (coarseAcross))
logger.debug("Gross Down: %s" % (coarseDown))
offAc = max(firstAc, coarseAcross)
offDn = max(firstDown, coarseDown)
lastAc = widthSlc - offAc
lastDown = (numPatches * valid_az_samples) - offDn
mSlc = isceobj.createSlcImage()
IU.copyAttributes(imSlc1, mSlc)
accessMode = 'read'
mSlc.setAccessMode(accessMode)
mSlc.createImage()
sSlc = isceobj.createSlcImage()
IU.copyAttributes(imSlc2, sSlc)
accessMode = 'read'
sSlc.setAccessMode(accessMode)
sSlc.createImage()
objAmpcor = Ampcor()
objAmpcor.setImageDataType1('complex')
objAmpcor.setImageDataType2('complex')
objAmpcor.setFirstSampleAcross(offAc)
objAmpcor.setLastSampleAcross(lastAc)
objAmpcor.setNumberLocationAcross(numLocationAcross)
objAmpcor.setFirstSampleDown(offDn)
objAmpcor.setLastSampleDown(lastDown)
objAmpcor.setNumberLocationDown(numLocationDown)
objAmpcor.setAcrossGrossOffset(coarseAcross)
objAmpcor.setDownGrossOffset(coarseDown)
objAmpcor.setFirstPRF(prf1)
objAmpcor.setSecondPRF(prf2)
if catalog is not None:
# Record the inputs
isceobj.Catalog.recordInputs(catalog, objAmpcor,
"runOffsetprf.%s" % sceneid, logger,
"runOffsetprf.%s" % sceneid)
objAmpcor.ampcor(mSlc, sSlc)
if catalog is not None:
# Record the outputs
isceobj.Catalog.recordOutputs(catalog, objAmpcor,
"runOffsetprf.%s" % sceneid, logger,
"runOffsetprf.%s" % sceneid)
mSlc.finalizeImage()
sSlc.finalizeImage()
return objAmpcor.getOffsetField()
def runAmpcor(master, slave):
'''
Run one ampcor process.
'''
import isceobj
from mroipac.ampcor.Ampcor import Ampcor
mImg = isceobj.createSlcImage()
mImg.load(master + '.xml')
mImg.setAccessMode('READ')
mImg.createImage()
sImg = isceobj.createSlcImage()
sImg.load(slave + '.xml')
sImg.setAccessMode('READ')
sImg.createImage()
objAmpcor = Ampcor('ampcor_burst')
objAmpcor.configure()
objAmpcor.setImageDataType1('mag')
objAmpcor.setImageDataType2('mag')
if objAmpcor.acrossGrossOffset is None:
coarseAcross = 0
if objAmpcor.downGrossOffset is None:
coarseDown = 0
objAmpcor.windowSizeWidth = 64
objAmpcor.windowSizeHeight = 32
objAmpcor.searchWindowSizeWidth = 16
objAmpcor.searchWindowSizeHeight = 16
objAmpcor.oversamplingFactor = 32
xMargin = 2 * objAmpcor.searchWindowSizeWidth + objAmpcor.windowSizeWidth
yMargin = 2 * objAmpcor.searchWindowSizeHeight + objAmpcor.windowSizeHeight
firstAc = 1000
#####Compute image positions
offDn = objAmpcor.windowSizeHeight // 2 + 1
offAc = firstAc + xMargin
offDnmax = mImg.getLength() - objAmpcor.windowSizeHeight // 2 - 1
lastAc = int(mImg.width - 1000 - xMargin)
if not objAmpcor.firstSampleAcross:
objAmpcor.setFirstSampleAcross(offAc)
if not objAmpcor.lastSampleAcross:
objAmpcor.setLastSampleAcross(lastAc)
if not objAmpcor.numberLocationAcross:
objAmpcor.setNumberLocationAcross(80)
if not objAmpcor.firstSampleDown:
objAmpcor.setFirstSampleDown(offDn)
if not objAmpcor.lastSampleDown:
objAmpcor.setLastSampleDown(offDnmax)
###Since we are only dealing with overlaps
objAmpcor.setNumberLocationDown(20)
#####Override gross offsets if not provided
if not objAmpcor.acrossGrossOffset:
objAmpcor.setAcrossGrossOffset(coarseAcross)
if not objAmpcor.downGrossOffset:
objAmpcor.setDownGrossOffset(coarseDown)
objAmpcor.setImageDataType1('mag')
objAmpcor.setImageDataType2('mag')
objAmpcor.setFirstPRF(1.0)
objAmpcor.setSecondPRF(1.0)
objAmpcor.setFirstRangeSpacing(1.0)
objAmpcor.setSecondRangeSpacing(1.0)
objAmpcor(mImg, sImg)
mImg.finalizeImage()
sImg.finalizeImage()
return objAmpcor.getOffsetField()
def estimateOffsetField(reference, secondary, azoffset=0, rgoffset=0):
'''
Estimate offset field between burst and simamp.
'''
sim = isceobj.createSlcImage()
sim.load(secondary + '.xml')
sim.setAccessMode('READ')
sim.createImage()
sar = isceobj.createSlcImage()
sar.load(reference + '.xml')
sar.setAccessMode('READ')
sar.createImage()
width = sar.getWidth()
length = sar.getLength()
objOffset = Ampcor(name='reference_offset1')
objOffset.configure()
objOffset.setAcrossGrossOffset(rgoffset)
objOffset.setDownGrossOffset(azoffset)
objOffset.setWindowSizeWidth(128)
objOffset.setWindowSizeHeight(128)
objOffset.setSearchWindowSizeWidth(40)
objOffset.setSearchWindowSizeHeight(40)
margin = 2 * objOffset.searchWindowSizeWidth + objOffset.windowSizeWidth
nAcross = 60
nDown = 60
offAc = max(101, -rgoffset) + margin
offDn = max(101, -azoffset) + margin
lastAc = int(min(width, sim.getWidth() - offAc) - margin)
lastDn = int(min(length, sim.getLength() - offDn) - margin)
if not objOffset.firstSampleAcross:
objOffset.setFirstSampleAcross(offAc)
if not objOffset.lastSampleAcross:
objOffset.setLastSampleAcross(lastAc)
if not objOffset.firstSampleDown:
objOffset.setFirstSampleDown(offDn)
if not objOffset.lastSampleDown:
objOffset.setLastSampleDown(lastDn)
if not objOffset.numberLocationAcross:
objOffset.setNumberLocationAcross(nAcross)
if not objOffset.numberLocationDown:
objOffset.setNumberLocationDown(nDown)
objOffset.setFirstPRF(1.0)
objOffset.setSecondPRF(1.0)
objOffset.setImageDataType1('complex')
objOffset.setImageDataType2('complex')
objOffset.ampcor(sar, sim)
sar.finalizeImage()
sim.finalizeImage()
result = objOffset.getOffsetField()
return result
def runCoregCc(self):
'''coregister bursts by cross correlation
'''
catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
self.updateParamemetersFromUser()
masterTrack = self._insar.loadTrack(master=True)
slaveTrack = self._insar.loadTrack(master=False)
#demFile = os.path.abspath(self._insar.dem)
#wbdFile = os.path.abspath(self._insar.wbd)
###############################################################################
self._insar.rangeResidualOffsetCc = [
[] for i in range(len(masterTrack.frames))
]
self._insar.azimuthResidualOffsetCc = [
[] for i in range(len(masterTrack.frames))
]
for i, frameNumber in enumerate(self._insar.masterFrames):
frameDir = 'f{}_{}'.format(i + 1, frameNumber)
os.chdir(frameDir)
for j, swathNumber in enumerate(
range(self._insar.startingSwath, self._insar.endingSwath + 1)):
swathDir = 's{}'.format(swathNumber)
os.chdir(swathDir)
print('processing frame {}, swath {}'.format(
frameNumber, swathNumber))
masterSwath = masterTrack.frames[i].swaths[j]
slaveSwath = slaveTrack.frames[i].swaths[j]
##################################################
# estimate cross-correlation offsets
##################################################
#compute number of offsets to use
wbdImg = isceobj.createImage()
wbdImg.load(self._insar.wbdOut + '.xml')
width = wbdImg.width
length = wbdImg.length
#initial number of offsets to use
numberOfOffsets = 800
#compute land ratio to further determine the number of offsets to use
if self.useWbdForNumberOffsets:
wbd = np.memmap(self._insar.wbdOut,
dtype='byte',
mode='r',
shape=(length, width))
landRatio = np.sum(wbd == 0) / length / width
del wbd
if (landRatio <= 0.00125):
print(
'\n\nWARNING: land area too small for estimating offsets between master and slave magnitudes at frame {}, swath {}'
.format(frameNumber, swathNumber))
print('set offsets to zero\n\n')
self._insar.rangeResidualOffsetCc[i].append(0.0)
self._insar.azimuthResidualOffsetCc[i].append(0.0)
catalog.addItem(
'warning message',
'land area too small for estimating offsets between master and slave magnitudes at frame {}, swath {}'
.format(frameNumber, swathNumber), 'runCoregCc')
continue
#total number of offsets to use
numberOfOffsets /= landRatio
#allocate number of offsets in range/azimuth according to image width/length
#number of offsets to use in range/azimuth
numberOfOffsetsRange = int(
np.sqrt(numberOfOffsets * width / length))
numberOfOffsetsAzimuth = int(
length / width * np.sqrt(numberOfOffsets * width / length))
#this should be better?
numberOfOffsetsRange = int(np.sqrt(numberOfOffsets))
numberOfOffsetsAzimuth = int(np.sqrt(numberOfOffsets))
if numberOfOffsetsRange > int(width / 2):
numberOfOffsetsRange = int(width / 2)
if numberOfOffsetsAzimuth > int(length / 2):
numberOfOffsetsAzimuth = int(length / 2)
if numberOfOffsetsRange < 10:
numberOfOffsetsRange = 10
if numberOfOffsetsAzimuth < 10:
numberOfOffsetsAzimuth = 10
#user's settings
if self.numberRangeOffsets != None:
numberOfOffsetsRange = self.numberRangeOffsets[i][j]
if self.numberAzimuthOffsets != None:
numberOfOffsetsAzimuth = self.numberAzimuthOffsets[i][j]
catalog.addItem(
'number of range offsets at frame {}, swath {}'.format(
frameNumber, swathNumber),
'{}'.format(numberOfOffsetsRange), 'runCoregCc')
catalog.addItem(
'number of azimuth offsets at frame {}, swath {}'.format(
frameNumber, swathNumber),
'{}'.format(numberOfOffsetsAzimuth), 'runCoregCc')
#need to cp to current directory to make it (gdal) work
if not os.path.isfile(self._insar.masterMagnitude):
os.symlink(
os.path.join(self._insar.masterBurstPrefix,
self._insar.masterMagnitude),
self._insar.masterMagnitude)
#shutil.copy2() can overwrite
shutil.copy2(
os.path.join(self._insar.masterBurstPrefix,
self._insar.masterMagnitude + '.vrt'),
self._insar.masterMagnitude + '.vrt')
shutil.copy2(
os.path.join(self._insar.masterBurstPrefix,
self._insar.masterMagnitude + '.xml'),
self._insar.masterMagnitude + '.xml')
if not os.path.isfile(self._insar.slaveMagnitude):
os.symlink(
os.path.join(
self._insar.slaveBurstPrefix + '_1_coreg_geom',
self._insar.slaveMagnitude),
self._insar.slaveMagnitude)
#shutil.copy2() can overwrite
shutil.copy2(
os.path.join(self._insar.slaveBurstPrefix + '_1_coreg_geom',
self._insar.slaveMagnitude + '.vrt'),
self._insar.slaveMagnitude + '.vrt')
shutil.copy2(
os.path.join(self._insar.slaveBurstPrefix + '_1_coreg_geom',
self._insar.slaveMagnitude + '.xml'),
self._insar.slaveMagnitude + '.xml')
#matching
ampcor = Ampcor(name='insarapp_slcs_ampcor')
ampcor.configure()
mMag = isceobj.createImage()
mMag.load(self._insar.masterMagnitude + '.xml')
mMag.setAccessMode('read')
mMag.createImage()
sMag = isceobj.createImage()
sMag.load(self._insar.slaveMagnitude + '.xml')
sMag.setAccessMode('read')
sMag.createImage()
ampcor.setImageDataType1('real')
ampcor.setImageDataType2('real')
ampcor.setMasterSlcImage(mMag)
ampcor.setSlaveSlcImage(sMag)
#MATCH REGION
rgoff = 0
azoff = 0
#it seems that we cannot use 0, haven't look into the problem
if rgoff == 0:
rgoff = 1
if azoff == 0:
azoff = 1
firstSample = 1
if rgoff < 0:
firstSample = int(35 - rgoff)
firstLine = 1
if azoff < 0:
firstLine = int(35 - azoff)
ampcor.setAcrossGrossOffset(rgoff)
ampcor.setDownGrossOffset(azoff)
ampcor.setFirstSampleAcross(firstSample)
ampcor.setLastSampleAcross(mMag.width)
ampcor.setNumberLocationAcross(numberOfOffsetsRange)
ampcor.setFirstSampleDown(firstLine)
ampcor.setLastSampleDown(mMag.length)
ampcor.setNumberLocationDown(numberOfOffsetsAzimuth)
#MATCH PARAMETERS
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(64)
#note this is the half width/length of search area, so number of resulting correlation samples: 8*2+1
ampcor.setSearchWindowSizeWidth(8)
ampcor.setSearchWindowSizeHeight(8)
#REST OF THE STUFF
ampcor.setAcrossLooks(1)
ampcor.setDownLooks(1)
ampcor.setOversamplingFactor(64)
ampcor.setZoomWindowSize(16)
#1. The following not set
#Matching Scale for Sample/Line Directions (-) = 1. 1.
#should add the following in Ampcor.py?
#if not set, in this case, Ampcor.py'value is also 1. 1.
#ampcor.setScaleFactorX(1.)
#ampcor.setScaleFactorY(1.)
#MATCH THRESHOLDS AND DEBUG DATA
#2. The following not set
#in roi_pac the value is set to 0 1
#in isce the value is set to 0.001 1000.0
#SNR and Covariance Thresholds (-) = {s1} {s2}
#should add the following in Ampcor?
#THIS SHOULD BE THE ONLY THING THAT IS DIFFERENT FROM THAT OF ROI_PAC
#ampcor.setThresholdSNR(0)
#ampcor.setThresholdCov(1)
ampcor.setDebugFlag(False)
ampcor.setDisplayFlag(False)
#in summary, only two things not set which are indicated by 'The following not set' above.
#run ampcor
ampcor.ampcor()
offsets = ampcor.getOffsetField()
refinedOffsets = cullOffsetsRoipac(offsets, numThreshold=50)
#finalize image, and re-create it
#otherwise the file pointer is still at the end of the image
mMag.finalizeImage()
sMag.finalizeImage()
#clear up
os.remove(self._insar.masterMagnitude)
os.remove(self._insar.masterMagnitude + '.vrt')
os.remove(self._insar.masterMagnitude + '.xml')
os.remove(self._insar.slaveMagnitude)
os.remove(self._insar.slaveMagnitude + '.vrt')
os.remove(self._insar.slaveMagnitude + '.xml')
#compute average offsets to use in resampling
if refinedOffsets == None:
rangeOffset = 0
azimuthOffset = 0
self._insar.rangeResidualOffsetCc[i].append(rangeOffset)
self._insar.azimuthResidualOffsetCc[i].append(azimuthOffset)
print(
'\n\nWARNING: too few offsets left in matching master and slave magnitudes at frame {}, swath {}'
.format(frameNumber, swathNumber))
print('set offsets to zero\n\n')
catalog.addItem(
'warning message',
'too few offsets left in matching master and slave magnitudes at frame {}, swath {}'
.format(frameNumber, swathNumber), 'runCoregCc')
else:
rangeOffset, azimuthOffset = meanOffset(refinedOffsets)
#for range offset, need to compute from a polynomial
#see components/isceobj/Location/Offset.py and components/isceobj/Util/Library/python/Poly2D.py for definations
(azimuthPoly,
rangePoly) = refinedOffsets.getFitPolynomials(rangeOrder=2,
azimuthOrder=2)
#make a deep copy, otherwise it also changes original coefficient list of rangePoly, which affects following rangePoly(*, *) computation
polyCoeff = copy.deepcopy(rangePoly.getCoeffs())
rgIndex = (np.arange(width) - rangePoly.getMeanRange()
) / rangePoly.getNormRange()
azIndex = (np.arange(length) - rangePoly.getMeanAzimuth()
) / rangePoly.getNormAzimuth()
rangeOffset = polyCoeff[0][0] + polyCoeff[0][1]*rgIndex[None,:] + polyCoeff[0][2]*rgIndex[None,:]**2 + \
(polyCoeff[1][0] + polyCoeff[1][1]*rgIndex[None,:]) * azIndex[:, None] + \
polyCoeff[2][0] * azIndex[:, None]**2
polyCoeff.append([
rangePoly.getMeanRange(),
rangePoly.getNormRange(),
rangePoly.getMeanAzimuth(),
rangePoly.getNormAzimuth()
])
self._insar.rangeResidualOffsetCc[i].append(polyCoeff)
self._insar.azimuthResidualOffsetCc[i].append(azimuthOffset)
catalog.addItem(
'range residual offset at {} {} at frame {}, swath {}'.
format(0, 0, frameNumber, swathNumber),
'{}'.format(rangePoly(0, 0)), 'runCoregCc')
catalog.addItem(
'range residual offset at {} {} at frame {}, swath {}'.
format(0, width - 1, frameNumber, swathNumber),
'{}'.format(rangePoly(0, width - 1)), 'runCoregCc')
catalog.addItem(
'range residual offset at {} {} at frame {}, swath {}'.
format(length - 1, 0, frameNumber, swathNumber),
'{}'.format(rangePoly(length - 1, 0)), 'runCoregCc')
catalog.addItem(
'range residual offset at {} {} at frame {}, swath {}'.
format(length - 1, width - 1, frameNumber, swathNumber),
'{}'.format(rangePoly(length - 1,
width - 1)), 'runCoregCc')
catalog.addItem(
'azimuth residual offset at frame {}, swath {}'.format(
frameNumber, swathNumber), '{}'.format(azimuthOffset),
'runCoregCc')
DEBUG = False
if DEBUG:
print('+++++++++++++++++++++++++++++')
print(rangeOffset[0, 0], rangePoly(0, 0))
print(rangeOffset[0, width - 1], rangePoly(0, width - 1))
print(rangeOffset[length - 1, 0], rangePoly(length - 1, 0))
print(rangeOffset[length - 1, width - 1],
rangePoly(length - 1, width - 1))
print(
rangeOffset[int((length - 1) / 2),
int((width - 1) / 2)],
rangePoly(int((length - 1) / 2), int((width - 1) / 2)))
print('+++++++++++++++++++++++++++++')
##################################################
# resample bursts
##################################################
slaveBurstResampledDir = self._insar.slaveBurstPrefix + '_2_coreg_cc'
#interferogramDir = self._insar.masterBurstPrefix + '-' + self._insar.slaveBurstPrefix + '_coreg_geom'
interferogramDir = 'burst_interf_2_coreg_cc'
interferogramPrefix = self._insar.masterBurstPrefix + '-' + self._insar.slaveBurstPrefix
resampleBursts(masterSwath,
slaveSwath,
self._insar.masterBurstPrefix,
self._insar.slaveBurstPrefix,
slaveBurstResampledDir,
interferogramDir,
self._insar.masterBurstPrefix,
self._insar.slaveBurstPrefix,
self._insar.slaveBurstPrefix,
interferogramPrefix,
self._insar.rangeOffset,
self._insar.azimuthOffset,
rangeOffsetResidual=rangeOffset,
azimuthOffsetResidual=azimuthOffset)
##################################################
# mosaic burst amplitudes and interferograms
##################################################
os.chdir(slaveBurstResampledDir)
mosaicBurstAmplitude(masterSwath,
self._insar.slaveBurstPrefix,
self._insar.slaveMagnitude,
numberOfLooksThreshold=4)
os.chdir('../')
os.chdir(interferogramDir)
mosaicBurstInterferogram(masterSwath,
interferogramPrefix,
self._insar.interferogram,
numberOfLooksThreshold=4)
os.chdir('../')
##################################################
# final amplitude and interferogram
##################################################
amp = np.zeros(
(masterSwath.numberOfLines, 2 * masterSwath.numberOfSamples),
dtype=np.float32)
amp[0:, 1:masterSwath.numberOfSamples*2:2] = np.fromfile(os.path.join(slaveBurstResampledDir, self._insar.slaveMagnitude), \
dtype=np.float32).reshape(masterSwath.numberOfLines, masterSwath.numberOfSamples)
amp[0:, 0:masterSwath.numberOfSamples*2:2] = np.fromfile(os.path.join(self._insar.masterBurstPrefix, self._insar.masterMagnitude), \
dtype=np.float32).reshape(masterSwath.numberOfLines, masterSwath.numberOfSamples)
amp.astype(np.float32).tofile(self._insar.amplitude)
create_xml(self._insar.amplitude, masterSwath.numberOfSamples,
masterSwath.numberOfLines, 'amp')
os.rename(
os.path.join(interferogramDir, self._insar.interferogram),
self._insar.interferogram)
os.rename(
os.path.join(interferogramDir,
self._insar.interferogram + '.vrt'),
self._insar.interferogram + '.vrt')
os.rename(
os.path.join(interferogramDir,
self._insar.interferogram + '.xml'),
self._insar.interferogram + '.xml')
os.chdir('../')
os.chdir('../')
###############################################################################
catalog.printToLog(logger, "runCoregCc")
self._insar.procDoc.addAllFromCatalog(catalog)
def runSlcOffset(self):
'''estimate SLC offsets
'''
if hasattr(self, 'doInSAR'):
if not self.doInSAR:
print('\nInSAR processing not requested, skip this and the remaining InSAR steps...')
return
catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
self.updateParamemetersFromUser()
referenceTrack = self._insar.loadTrack(reference=True)
secondaryTrack = self._insar.loadTrack(reference=False)
demFile = os.path.abspath(self._insar.dem)
wbdFile = os.path.abspath(self._insar.wbd)
for i, frameNumber in enumerate(self._insar.referenceFrames):
frameDir = 'f{}_{}'.format(i+1, frameNumber)
os.chdir(frameDir)
for j, swathNumber in enumerate(range(self._insar.startingSwath, self._insar.endingSwath + 1)):
swathDir = 's{}'.format(swathNumber)
os.chdir(swathDir)
print('estimating offset frame {}, swath {}'.format(frameNumber, swathNumber))
referenceSwath = referenceTrack.frames[i].swaths[j]
secondarySwath = secondaryTrack.frames[i].swaths[j]
##########################################
#1. set number of matching points
##########################################
#set initinial numbers
if (self._insar.modeCombination == 21) or (self._insar.modeCombination == 22):
numberOfOffsetsRange = 10
numberOfOffsetsAzimuth = 40
else:
numberOfOffsetsRange = 20
numberOfOffsetsAzimuth = 20
#change the initial numbers using water body
if self.useWbdForNumberOffsets and (self._insar.wbd != None):
numberRangeLooks=100
numberAzimuthLooks=100
#compute land ratio using topo module
topo(referenceSwath, referenceTrack, demFile, 'lat.rdr', 'lon.rdr', 'hgt.rdr', losFile='los.rdr',
incFile=None, mskFile=None,
numberRangeLooks=numberRangeLooks, numberAzimuthLooks=numberAzimuthLooks, multilookTimeOffset=False)
waterBodyRadar('lat.rdr', 'lon.rdr', wbdFile, 'wbd.rdr')
wbdImg = isceobj.createImage()
wbdImg.load('wbd.rdr.xml')
width = wbdImg.width
length = wbdImg.length
wbd = np.fromfile('wbd.rdr', dtype=np.byte).reshape(length, width)
landRatio = np.sum(wbd==0) / (length*width)
if (landRatio <= 0.00125):
print('\n\nWARNING: land too small for estimating slc offsets at frame {}, swath {}'.format(frameNumber, swathNumber))
print('proceed to use geometric offsets for forming interferogram')
print('but please consider not using this swath\n\n')
catalog.addItem('warning message', 'land too small for estimating slc offsets at frame {}, swath {}, use geometric offsets'.format(frameNumber, swathNumber), 'runSlcOffset')
#compute geomtricla offsets
geo2rdr(secondarySwath, secondaryTrack, 'lat.rdr', 'lon.rdr', 'hgt.rdr', 'rg.rdr', 'az.rdr', numberRangeLooks=numberRangeLooks, numberAzimuthLooks=numberAzimuthLooks, multilookTimeOffset=False)
reformatGeometricalOffset('rg.rdr', 'az.rdr', 'cull.off', rangeStep=numberRangeLooks, azimuthStep=numberAzimuthLooks, maximumNumberOfOffsets=2000)
os.remove('lat.rdr')
os.remove('lat.rdr.vrt')
os.remove('lat.rdr.xml')
os.remove('lon.rdr')
os.remove('lon.rdr.vrt')
os.remove('lon.rdr.xml')
os.remove('hgt.rdr')
os.remove('hgt.rdr.vrt')
os.remove('hgt.rdr.xml')
os.remove('los.rdr')
os.remove('los.rdr.vrt')
os.remove('los.rdr.xml')
os.remove('wbd.rdr')
os.remove('wbd.rdr.vrt')
os.remove('wbd.rdr.xml')
os.remove('rg.rdr')
os.remove('rg.rdr.vrt')
os.remove('rg.rdr.xml')
os.remove('az.rdr')
os.remove('az.rdr.vrt')
os.remove('az.rdr.xml')
os.chdir('../')
continue
os.remove('lat.rdr')
os.remove('lat.rdr.vrt')
os.remove('lat.rdr.xml')
os.remove('lon.rdr')
os.remove('lon.rdr.vrt')
os.remove('lon.rdr.xml')
os.remove('hgt.rdr')
os.remove('hgt.rdr.vrt')
os.remove('hgt.rdr.xml')
os.remove('los.rdr')
os.remove('los.rdr.vrt')
os.remove('los.rdr.xml')
os.remove('wbd.rdr')
os.remove('wbd.rdr.vrt')
os.remove('wbd.rdr.xml')
#put the results on a grid with a specified interval
interval = 0.2
axisRatio = int(np.sqrt(landRatio)/interval)*interval + interval
if axisRatio > 1:
axisRatio = 1
numberOfOffsetsRange = int(numberOfOffsetsRange/axisRatio)
numberOfOffsetsAzimuth = int(numberOfOffsetsAzimuth/axisRatio)
else:
catalog.addItem('warning message', 'no water mask used to determine number of matching points. frame {} swath {}'.format(frameNumber, swathNumber), 'runSlcOffset')
#user's settings
if self.numberRangeOffsets != None:
numberOfOffsetsRange = self.numberRangeOffsets[i][j]
if self.numberAzimuthOffsets != None:
numberOfOffsetsAzimuth = self.numberAzimuthOffsets[i][j]
catalog.addItem('number of offsets range frame {} swath {}'.format(frameNumber, swathNumber), numberOfOffsetsRange, 'runSlcOffset')
catalog.addItem('number of offsets azimuth frame {} swath {}'.format(frameNumber, swathNumber), numberOfOffsetsAzimuth, 'runSlcOffset')
##########################################
#2. match using ampcor
##########################################
ampcor = Ampcor(name='insarapp_slcs_ampcor')
ampcor.configure()
mSLC = isceobj.createSlcImage()
mSLC.load(self._insar.referenceSlc+'.xml')
mSLC.setAccessMode('read')
mSLC.createImage()
sSLC = isceobj.createSlcImage()
sSLC.load(self._insar.secondarySlc+'.xml')
sSLC.setAccessMode('read')
sSLC.createImage()
ampcor.setImageDataType1('complex')
ampcor.setImageDataType2('complex')
ampcor.setReferenceSlcImage(mSLC)
ampcor.setSecondarySlcImage(sSLC)
#MATCH REGION
#compute an offset at image center to use
rgoff, azoff = computeOffsetFromOrbit(referenceSwath, referenceTrack, secondarySwath, secondaryTrack,
referenceSwath.numberOfSamples * 0.5,
referenceSwath.numberOfLines * 0.5)
#it seems that we cannot use 0, haven't look into the problem
if rgoff == 0:
rgoff = 1
if azoff == 0:
azoff = 1
firstSample = 1
if rgoff < 0:
firstSample = int(35 - rgoff)
firstLine = 1
if azoff < 0:
firstLine = int(35 - azoff)
ampcor.setAcrossGrossOffset(rgoff)
ampcor.setDownGrossOffset(azoff)
ampcor.setFirstSampleAcross(firstSample)
ampcor.setLastSampleAcross(mSLC.width)
ampcor.setNumberLocationAcross(numberOfOffsetsRange)
ampcor.setFirstSampleDown(firstLine)
ampcor.setLastSampleDown(mSLC.length)
ampcor.setNumberLocationDown(numberOfOffsetsAzimuth)
#MATCH PARAMETERS
#full-aperture mode
if (self._insar.modeCombination == 21) or \
(self._insar.modeCombination == 22) or \
(self._insar.modeCombination == 31) or \
(self._insar.modeCombination == 32):
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(512)
#note this is the half width/length of search area, number of resulting correlation samples: 32*2+1
ampcor.setSearchWindowSizeWidth(32)
ampcor.setSearchWindowSizeHeight(32)
#triggering full-aperture mode matching
ampcor.setWinsizeFilt(8)
ampcor.setOversamplingFactorFilt(64)
#regular mode
else:
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(64)
ampcor.setSearchWindowSizeWidth(32)
ampcor.setSearchWindowSizeHeight(32)
#REST OF THE STUFF
ampcor.setAcrossLooks(1)
ampcor.setDownLooks(1)
ampcor.setOversamplingFactor(64)
ampcor.setZoomWindowSize(16)
#1. The following not set
#Matching Scale for Sample/Line Directions (-) = 1. 1.
#should add the following in Ampcor.py?
#if not set, in this case, Ampcor.py'value is also 1. 1.
#ampcor.setScaleFactorX(1.)
#ampcor.setScaleFactorY(1.)
#MATCH THRESHOLDS AND DEBUG DATA
#2. The following not set
#in roi_pac the value is set to 0 1
#in isce the value is set to 0.001 1000.0
#SNR and Covariance Thresholds (-) = {s1} {s2}
#should add the following in Ampcor?
#THIS SHOULD BE THE ONLY THING THAT IS DIFFERENT FROM THAT OF ROI_PAC
#ampcor.setThresholdSNR(0)
#ampcor.setThresholdCov(1)
ampcor.setDebugFlag(False)
ampcor.setDisplayFlag(False)
#in summary, only two things not set which are indicated by 'The following not set' above.
#run ampcor
ampcor.ampcor()
offsets = ampcor.getOffsetField()
ampcorOffsetFile = 'ampcor.off'
writeOffset(offsets, ampcorOffsetFile)
#finalize image, and re-create it
#otherwise the file pointer is still at the end of the image
mSLC.finalizeImage()
sSLC.finalizeImage()
##########################################
#3. cull offsets
##########################################
refinedOffsets = cullOffsets(offsets)
if refinedOffsets == None:
print('******************************************************************')
print('WARNING: There are not enough offsets left, so we are forced to')
print(' use offset without culling. frame {}, swath {}'.format(frameNumber, swathNumber))
print('******************************************************************')
catalog.addItem('warning message', 'not enough offsets left, use offset without culling. frame {} swath {}'.format(frameNumber, swathNumber), 'runSlcOffset')
refinedOffsets = offsets
cullOffsetFile = 'cull.off'
writeOffset(refinedOffsets, cullOffsetFile)
os.chdir('../')
os.chdir('../')
catalog.printToLog(logger, "runSlcOffset")
self._insar.procDoc.addAllFromCatalog(catalog)
def estimateSwathOffset(swath1,
swath2,
image1,
image2,
rangeScale1=1,
azimuthScale1=1,
rangeScale2=1,
azimuthScale2=1,
numberOfAzimuthLooks=10):
'''
estimate offset of two adjacent swaths using matching
'''
from osgeo import gdal
import isceobj
from contrib.alos2proc_f.alos2proc_f import rect_with_looks
from isceobj.Alos2Proc.Alos2ProcPublic import create_xml
from isceobj.Alos2Proc.Alos2ProcPublic import cullOffsets
from isceobj.Alos2Proc.Alos2ProcPublic import meanOffset
from mroipac.ampcor.Ampcor import Ampcor
#processing image 1
rangeOff1 = int(
(swath2.startingRange - swath1.startingRange) / swath1.rangePixelSize)
if rangeOff1 < 0:
rangeOff1 = 0
numberOfSamples1 = swath1.numberOfSamples - rangeOff1
numberOfSamplesRect1 = int(numberOfSamples1 / rangeScale1)
numberOfLinesRect1 = int(swath1.numberOfLines / azimuthScale1)
numberOfSamplesLook1 = int(numberOfSamplesRect1 / 1)
numberOfLinesLook1 = int(numberOfLinesRect1 / numberOfAzimuthLooks)
#get magnitude image whether complex or not
#ReadAsArray: https://pcjericks.github.io/py-gdalogr-cookbook/raster_layers.html
ds = gdal.Open(image1 + '.vrt', gdal.GA_ReadOnly)
data = ds.ReadAsArray(rangeOff1, 0, numberOfSamples1, swath1.numberOfLines)
ds = None
(np.absolute(data)).astype(np.float32).tofile('image1.float')
#rectify
if rangeScale1 == 1 and azimuthScale1 == 1:
os.rename('image1.float', 'image1_rect.float')
else:
rect_with_looks('image1.float', 'image1_rect.float', numberOfSamples1,
swath1.numberOfLines, numberOfSamplesRect1,
numberOfLinesRect1, rangeScale1, 0.0, 0.0,
azimuthScale1, 0.0, 0.0, 1, 1, 1, 1, 'REAL',
'Bilinear')
os.remove('image1.float')
#take looks
if numberOfAzimuthLooks == 1:
os.rename('image1_rect.float', 'image1_look.float')
else:
data1 = np.fromfile('image1_rect.float',
dtype=np.float32).reshape(numberOfLinesRect1,
numberOfSamplesRect1)
data1 = np.sqrt(multilook(data1**2, numberOfAzimuthLooks, 1))
data1.astype(np.float32).tofile('image1_look.float')
os.remove('image1_rect.float')
create_xml('image1_look.float', numberOfSamplesLook1, numberOfLinesLook1,
'float')
#processing image 2
rangeOff2 = 0
numberOfSamples2 = int(
(swath1.startingRange + swath1.rangePixelSize *
(swath1.numberOfSamples - 1) - swath2.startingRange) /
swath2.rangePixelSize) + 1
if numberOfSamples2 > swath2.numberOfSamples:
numberOfSamples2 = swath2.numberOfSamples
numberOfSamplesRect2 = int(numberOfSamples2 / rangeScale2)
numberOfLinesRect2 = int(swath2.numberOfLines / azimuthScale2)
numberOfSamplesLook2 = int(numberOfSamplesRect2 / 1)
numberOfLinesLook2 = int(numberOfLinesRect2 / numberOfAzimuthLooks)
#get magnitude image whether complex or not
ds = gdal.Open(image2 + '.vrt', gdal.GA_ReadOnly)
data = ds.ReadAsArray(rangeOff2, 0, numberOfSamples2, swath2.numberOfLines)
ds = None
(np.absolute(data)).astype(np.float32).tofile('image2.float')
#rectify
if rangeScale2 == 1 and azimuthScale2 == 1:
os.rename('image2.float', 'image2_rect.float')
else:
rect_with_looks('image2.float', 'image2_rect.float', numberOfSamples2,
swath2.numberOfLines, numberOfSamplesRect2,
numberOfLinesRect2, rangeScale2, 0.0, 0.0,
azimuthScale2, 0.0, 0.0, 1, 1, 1, 1, 'REAL',
'Bilinear')
os.remove('image2.float')
#take looks
if numberOfAzimuthLooks == 1:
os.rename('image2_rect.float', 'image2_look.float')
else:
data2 = np.fromfile('image2_rect.float',
dtype=np.float32).reshape(numberOfLinesRect2,
numberOfSamplesRect2)
data2 = np.sqrt(multilook(data2**2, numberOfAzimuthLooks, 1))
data2.astype(np.float32).tofile('image2_look.float')
os.remove('image2_rect.float')
create_xml('image2_look.float', numberOfSamplesLook2, numberOfLinesLook2,
'float')
#matching
ampcor = Ampcor(name='insarapp_slcs_ampcor')
ampcor.configure()
mMag = isceobj.createImage()
mMag.load('image1_look.float.xml')
mMag.setAccessMode('read')
mMag.createImage()
sMag = isceobj.createImage()
sMag.load('image2_look.float.xml')
sMag.setAccessMode('read')
sMag.createImage()
ampcor.setImageDataType1('real')
ampcor.setImageDataType2('real')
ampcor.setReferenceSlcImage(mMag)
ampcor.setSecondarySlcImage(sMag)
#MATCH REGION
rgoff = 0
azoff = int(
(swath1.sensingStart - swath2.sensingStart).total_seconds() /
swath1.azimuthLineInterval / azimuthScale1 / numberOfAzimuthLooks)
#it seems that we cannot use 0, haven't look into the problem
if rgoff == 0:
rgoff = 1
if azoff == 0:
azoff = 1
firstSample = 1
if rgoff < 0:
firstSample = int(35 - rgoff)
firstLine = 1
if azoff < 0:
firstLine = int(35 - azoff)
ampcor.setAcrossGrossOffset(rgoff)
ampcor.setDownGrossOffset(azoff)
ampcor.setFirstSampleAcross(firstSample)
ampcor.setLastSampleAcross(numberOfSamplesLook1)
ampcor.setNumberLocationAcross(20)
ampcor.setFirstSampleDown(firstLine)
ampcor.setLastSampleDown(numberOfLinesLook1)
ampcor.setNumberLocationDown(100)
#MATCH PARAMETERS
ampcor.setWindowSizeWidth(32)
ampcor.setWindowSizeHeight(32)
#note this is the half width/length of search area, so number of resulting correlation samples: 8*2+1
ampcor.setSearchWindowSizeWidth(8)
ampcor.setSearchWindowSizeHeight(8)
#REST OF THE STUFF
ampcor.setAcrossLooks(1)
ampcor.setDownLooks(1)
ampcor.setOversamplingFactor(64)
ampcor.setZoomWindowSize(16)
#1. The following not set
#Matching Scale for Sample/Line Directions (-) = 1. 1.
#should add the following in Ampcor.py?
#if not set, in this case, Ampcor.py'value is also 1. 1.
#ampcor.setScaleFactorX(1.)
#ampcor.setScaleFactorY(1.)
#MATCH THRESHOLDS AND DEBUG DATA
#2. The following not set
#in roi_pac the value is set to 0 1
#in isce the value is set to 0.001 1000.0
#SNR and Covariance Thresholds (-) = {s1} {s2}
#should add the following in Ampcor?
#THIS SHOULD BE THE ONLY THING THAT IS DIFFERENT FROM THAT OF ROI_PAC
#ampcor.setThresholdSNR(0)
#ampcor.setThresholdCov(1)
ampcor.setDebugFlag(False)
ampcor.setDisplayFlag(False)
#in summary, only two things not set which are indicated by 'The following not set' above.
#run ampcor
ampcor.ampcor()
offsets = ampcor.getOffsetField()
refinedOffsets = cullOffsets(offsets)
#finalize image, and re-create it
#otherwise the file pointer is still at the end of the image
mMag.finalizeImage()
sMag.finalizeImage()
os.remove('image1_look.float')
os.remove('image1_look.float.vrt')
os.remove('image1_look.float.xml')
os.remove('image2_look.float')
os.remove('image2_look.float.vrt')
os.remove('image2_look.float.xml')
if refinedOffsets != None:
rangeOffset, azimuthOffset = meanOffset(refinedOffsets)
rangeOffset -= rangeOff1 / rangeScale1
azimuthOffset *= numberOfAzimuthLooks
return (rangeOffset, azimuthOffset)
else:
return None
#MATCH REGION
########################################
#avoid the complain of Ampcor.py
xMargin = 2 * searchMaxWidth + fftWidth
yMargin = 2 * searchMaxLength + fftLength
#make it smaller
xMargin = fftWidth / 2 + 5
yMargin = fftLength / 2 + 5
firstSampleAcross = xMargin
firstSampleDown = yMargin
lastSampleAcross = lookAmpWidth - xMargin
lastSampleDown = lookAmpLength - yMargin
########################################
objAmpcor.setFirstSampleAcross(firstSampleAcross)
objAmpcor.setLastSampleAcross(lastSampleAcross)
objAmpcor.setNumberLocationAcross(numRange)
objAmpcor.setFirstSampleDown(firstSampleDown)
objAmpcor.setLastSampleDown(lastSampleDown)
objAmpcor.setNumberLocationDown(numAzimuth)
#MATCH PARAMETERS
objAmpcor.setWindowSizeWidth(fftWidth)
objAmpcor.setWindowSizeHeight(fftLength)
objAmpcor.setSearchWindowSizeWidth(searchMaxWidth)
objAmpcor.setSearchWindowSizeHeight(searchMaxLength)
objAmpcor.setAcrossLooks(1)
objAmpcor.setDownLooks(1)
objAmpcor.setOversamplingFactor(64)
def run(imageAmp, imageSim, numBand, infos, nstages, scale, stdWriter, catalog=None, sceneid='NO_ID'):
logger.info("Running Rgoffset: %s" % sceneid)
coarseAcross = 0
coarseDown = 0
firstAc = infos['firstSampleAcross']
firstDown = infos['firstSampleDown']
numLocationAcross = infos['numberLocationAcross']
numLocationDown = infos['numberLocationDown']
slaveWidth = imageAmp.getWidth()
slaveLength = imageAmp.getLength()
objAmp = isceobj.createSlcImage()
objAmp.dataType = 'CFLOAT'
objAmp.bands = 1
objAmp.setFilename(imageAmp.getFilename())
objAmp.setAccessMode('read')
objAmp.setWidth(slaveWidth)
objAmp.createImage()
masterWidth = imageSim.getWidth()
objSim = isceobj.createImage()
objSim.setFilename(imageSim.getFilename())
objSim.dataType = 'FLOAT'
objSim.setWidth(masterWidth)
objSim.setAccessMode('read')
objSim.createImage()
masterLength = imageSim.getLength()
finalIteration = False
for iterNum in xrange(nstages-1,-1,-1):
####Rewind the images
try:
objAmp.rewind()
objSim.rewind()
except:
print('Issues when rewinding images.') #KK sys.exit?
######
logger.debug('Starting Iteration Stage : %d'%(iterNum))
logger.debug("Gross Across: %s" % (coarseAcross))
logger.debug("Gross Down: %s" % (coarseDown))
####Clear objs
objAmpcor = None
objOff = None
offField = None
objAmpcor = Ampcor()
objAmpcor.setImageDataType1('real')
objAmpcor.setImageDataType2('complex')
####Dummy values as there is no scale difference at this step
objAmpcor.setFirstPRF(1.0)
objAmpcor.setSecondPRF(1.0)
objAmpcor.setFirstRangeSpacing(1.0)
objAmpcor.setSecondRangeSpacing(1.0)
#####Scale all the reference and search windows
scaleFactor = scale**iterNum
objAmpcor.windowSizeWidth *= scaleFactor
objAmpcor.windowSizeHeight *= scaleFactor
objAmpcor.searchWindowSizeWidth *= scaleFactor
objAmpcor.searchWindowSizeHeight *= scaleFactor
xMargin = 2*objAmpcor.searchWindowSizeWidth + objAmpcor.windowSizeWidth
yMargin = 2*objAmpcor.searchWindowSizeHeight + objAmpcor.windowSizeHeight
#####Set image limits for search
offAc = max(firstAc,-coarseAcross)+xMargin
offDn = max(firstDn,-coarseDown)+yMargin
offAcmax = int(coarseAcross)
logger.debug("Gross Max Across: %s" % (offAcmax))
lastAc = int(min(masterWidth, slaveWidth-offAcmax) - xMargin)
offDnmax = int(coarseDown)
logger.debug("Gross Max Down: %s" % (offDnmax))
lastDn = int(min(masterLength, slaveLength-offDnmax) - yMargin)
logger.debug("Last Down: %s" %(lastDn))
objAmpcor.setFirstSampleAcross(offAc)
objAmpcor.setLastSampleAcross(lastAc)
objAmpcor.setFirstSampleDown(offDn)
objAmpcor.setLastSampleDown(lastDn)
objAmpcor.setAcrossGrossOffset(coarseAcross)
objAmpcor.setDownGrossOffset(coarseDown)
if (offAc > lastAc) or (offDn > lastDn):
print('Search window scale is too large.')
print('Skipping Scale: %d'%(iterNum+1))
continue
if ((lastAc - offAc) <= (2*xMargin)) or ((lastDn - offDn) <= (2*yMargin)):
print('Image not large enough accounting for margins.')
print('Skipping Scale: %d'%(iterNum+1))
continue
logger.debug('Looks = %d'%scaleFactor)
logger.debug('Correlation window sizes: %d %d'%(objAmpcor.windowSizeWidth, objAmpcor.windowSizeHeight))
logger.debug('Search window sizes: %d %d'%(objAmpcor.searchWindowSizeWidth, objAmpcor.searchWindowSizeHeight))
logger.debug(' Across pos: %d %d out of (%d,%d)'%(objAmpcor.firstSampleAcross, objAmpcor.lastSampleAcross, masterWidth, slaveWidth))
logger.debug(' Down pos: %d %d out of (%d,%d)'%(objAmpcor.firstSampleDown, objAmpcor.lastSampleDown, masterLength, slaveLength))
if (iterNum == 0) or finalIteration:
if catalog is not None:
# Record the inputs
isceobj.Catalog.recordInputs(catalog, objAmpcor,
"runRgoffset.%s" % sceneid,
logger,
"runRgoffset.%s" % sceneid)
objAmpcor.setNumberLocationAcross(numLocationAcross)
objAmpcor.setNumberLocationDown(numLocationDown)
else:
objAmpcor.setNumberLocationAcross(20)
objAmpcor.setNumberLocationDown(20)
objAmpcor.setAcrossLooks(scaleFactor)
objAmpcor.setDownLooks(scaleFactor)
objAmpcor.setZoomWindowSize(scale*objAmpcor.zoomWindowSize)
objAmpcor.setOversamplingFactor(2)
objAmpcor.ampcor(objSim,objAmp)
offField = objAmpcor.getOffsetField()
if (iterNum == 0) or finalIteration:
if catalog is not None:
# Record the outputs
isceobj.Catalog.recordOutputs(catalog, objAmpcor,
"runRgoffset.%s" % sceneid,
logger,
"runRgoffset.%s" % sceneid)
else:
objOff = isceobj.createOffoutliers()
objOff.wireInputPort(name='offsets', object=offField)
objOff.setSNRThreshold(2.0)
objOff.setDistance(10)
objOff.setStdWriter = stdWriter.set_file_tags("nstage_offoutliers"+str(iterNum),
"log",
"err",
"out")
objOff.offoutliers()
coarseAcross = int(objOff.averageOffsetAcross)
coarseDown = int(objOff.averageOffsetDown)
objSim.finalizeImage()
objAmp.finalizeImage()
objOff = None
objAmpcor = None
return offField
def run(imageAmp, imageSim, numBand, prf, fs1, infos, stdWriter, catalog=None, sceneid='NO_ID'):
#fs1: range sampling rate
firstAc = infos['firstSampleAcrossPrf']
firstDown = infos['firstSampleDownPrf']
numLocationAcross = infos['numberLocationAcrossPrf']
numLocationDown = infos['numberLocationDownPrf']
coarseAcross = 0
coarseDown = 0
#Fake amplitude image as a complex image
objAmp = isceobj.createImage()
objAmp.setAccessMode('read')
objAmp.dataType = 'CFLOAT'
objAmp.bands = 1
objAmp.setFilename(imageAmp.filename)
objAmp.setWidth(imageAmp.width)
objAmp.createImage()
widthAmp = objAmp.getWidth()
intLength = objAmp.getLength()
objSim = isceobj.createImage()
objSim.setFilename(imageSim.filename)
objSim.setWidth(imageSim.width)
objSim.dataType='FLOAT'
objSim.setAccessMode('read')
objSim.createImage()
# check if it's correct
delRg1 = CN.SPEED_OF_LIGHT / (2*fs1)
objAmpcor = Ampcor()
objAmpcor.setImageDataType1('real')
objAmpcor.setImageDataType2('complex')
####Adjust first and last values using window sizes
xMargin = 2*objAmpcor.searchWindowSizeWidth + objAmpcor.windowSizeWidth
yMargin = 2*objAmpcor.searchWindowSizeHeight + objAmpcor.windowSizeHeight
offAc = max(firstAc, -coarseAcross) + xMargin
offDn = max(firstDown, -coarseDown) + yMargin
lastAc = int(min(widthAmp, widthAmp-offAc) - xMargin)
lastDn = int(min(intLength, intLength-offDn) - yMargin)
print(xMargin, yMargin)
print(offAc, lastAc)
print(offDn, lastDn)
objAmpcor.setFirstSampleAcross(offAc)
objAmpcor.setLastSampleAcross(lastAc)
objAmpcor.setNumberLocationAcross(numLocationAcross)
objAmpcor.setFirstSampleDown(offDn)
objAmpcor.setLastSampleDown(lastDn)
objAmpcor.setNumberLocationDown(numLocationDown)
#set the tag used in the outfile. each message is preceded by this tag
#if the writer is not of "file" type the call has no effect
objAmpcor.stdWriter = stdWriter.set_file_tags("rgoffset",
"log",
"err",
"out")
objAmpcor.setFirstPRF(prf)
objAmpcor.setSecondPRF(prf)
objAmpcor.setAcrossGrossOffset(coarseAcross)
objAmpcor.setDownGrossOffset(coarseDown)
objAmpcor.setFirstRangeSpacing(delRg1)
objAmpcor.setSecondRangeSpacing(delRg1)
objAmpcor.ampcor(objSim,objAmp)
if catalog is not None:
# Record the inputs and outputs
isceobj.Catalog.recordInputsAndOutputs(catalog, objAmpcor,
"runRgoffset_ampcor.%s" % sceneid,
logger,
"runRgoffset_ampcor.%s" % sceneid)
objAmp.finalizeImage()
objSim.finalizeImage()
return objAmpcor.getOffsetField()
def runRgoffset(self):
numLocationAcross = self._insar.getNumberLocationAcrossPrf()
numLocationDown = self._insar.getNumberLocationDownPrf()
firstAc = self._insar.getFirstSampleAcrossPrf()
firstDown = self._insar.getFirstSampleDownPrf()
#Fake amplitude image as a complex image
imageAmp = self._insar.getResampAmpImage()
objAmp = isceobj.createImage()
objAmp.setAccessMode('read')
objAmp.dataType = 'CFLOAT'
objAmp.bands = 1
objAmp.setFilename(imageAmp.filename)
objAmp.setWidth(imageAmp.width)
objAmp.createImage()
widthAmp = objAmp.getWidth()
intLength = objAmp.getLength()
imageSim = self._insar.getSimAmpImage()
objSim = isceobj.createImage()
objSim.setFilename(imageSim.filename)
objSim.setWidth(imageSim.width)
objSim.dataType = 'FLOAT'
objSim.setAccessMode('read')
objSim.createImage()
simWidth = imageSim.getWidth()
simLength = imageSim.getLength()
fs1 = self._insar.getReferenceFrame().getInstrument().getRangeSamplingRate(
) ##check
delRg1 = CN.SPEED_OF_LIGHT / (2 * fs1) ## if it's correct
objAmpcor = Ampcor(name='insarapp_intsim_ampcor')
objAmpcor.configure()
objAmpcor.setImageDataType1('real')
objAmpcor.setImageDataType2('mag')
####Adjust first and last values using window sizes
xMargin = 2 * objAmpcor.searchWindowSizeWidth + objAmpcor.windowSizeWidth
yMargin = 2 * objAmpcor.searchWindowSizeHeight + objAmpcor.windowSizeHeight
if not objAmpcor.acrossGrossOffset:
coarseAcross = 0
else:
coarseAcross = objAmpcor.acrossGrossOffset
if not objAmpcor.downGrossOffset:
coarseDown = 0
else:
coarseDown = objAmpcor.downGrossOffset
offAc = max(firstAc, -coarseAcross) + xMargin + 1
offDn = max(firstDown, -coarseDown) + yMargin + 1
lastAc = int(min(widthAmp, simWidth - offAc) - xMargin - 1)
lastDn = int(min(intLength, simLength - offDn) - yMargin - 1)
if not objAmpcor.firstSampleAcross:
objAmpcor.setFirstSampleAcross(offAc)
if not objAmpcor.lastSampleAcross:
objAmpcor.setLastSampleAcross(lastAc)
if not objAmpcor.numberLocationAcross:
objAmpcor.setNumberLocationAcross(numLocationAcross)
if not objAmpcor.firstSampleDown:
objAmpcor.setFirstSampleDown(offDn)
if not objAmpcor.lastSampleDown:
objAmpcor.setLastSampleDown(lastDn)
if not objAmpcor.numberLocationDown:
objAmpcor.setNumberLocationDown(numLocationDown)
#set the tag used in the outfile. each message is precided by this tag
#is the writer is not of "file" type the call has no effect
self._stdWriter.setFileTag("rgoffset", "log")
self._stdWriter.setFileTag("rgoffset", "err")
self._stdWriter.setFileTag("rgoffset", "out")
objAmpcor.setStdWriter(self._stdWriter)
prf = self._insar.getReferenceFrame().getInstrument(
).getPulseRepetitionFrequency()
objAmpcor.setFirstPRF(prf)
objAmpcor.setSecondPRF(prf)
if not objAmpcor.acrossGrossOffset:
objAmpcor.setAcrossGrossOffset(coarseAcross)
if not objAmpcor.downGrossOffset:
objAmpcor.setDownGrossOffset(coarseDown)
objAmpcor.setFirstRangeSpacing(delRg1)
objAmpcor.setSecondRangeSpacing(delRg1)
objAmpcor.ampcor(objSim, objAmp)
# Record the inputs and outputs
from isceobj.Catalog import recordInputsAndOutputs
recordInputsAndOutputs(self._insar.procDoc, objAmpcor, "runRgoffset_ampcor", \
logger, "runRgoffset_ampcor")
self._insar.setOffsetField(objAmpcor.getOffsetField())
self._insar.setRefinedOffsetField(objAmpcor.getOffsetField())
objAmp.finalizeImage()
objSim.finalizeImage()
def runSlcMatch(self):
'''match a pair of SLCs
'''
if not self.doDenseOffset:
return
if not ((self._insar.modeCombination == 0) or (self._insar.modeCombination == 1)):
return
catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
self.updateParamemetersFromUser()
demFile = os.path.abspath(self._insar.dem)
wbdFile = os.path.abspath(self._insar.wbd)
denseOffsetDir = 'dense_offset'
os.makedirs(denseOffsetDir, exist_ok=True)
os.chdir(denseOffsetDir)
masterTrack = self._insar.loadProduct(self._insar.masterTrackParameter)
slaveTrack = self._insar.loadProduct(self._insar.slaveTrackParameter)
#########################################################################################
##################################################
# compute geometric offsets
##################################################
if self.useGPU and self._insar.hasGPU():
topoGPU(masterTrack, 1, 1, demFile,
'lat.rdr', 'lon.rdr', 'hgt.rdr', 'los.rdr')
geo2RdrGPU(slaveTrack, 1, 1,
'lat.rdr', 'lon.rdr', 'hgt.rdr', 'rg.off', 'az.off')
else:
topoCPU(masterTrack, 1, 1, demFile,
'lat.rdr', 'lon.rdr', 'hgt.rdr', 'los.rdr')
geo2RdrCPU(slaveTrack, 1, 1,
'lat.rdr', 'lon.rdr', 'hgt.rdr', 'rg.off', 'az.off')
##################################################
# resample SLC
##################################################
#SlaveSlcResampled = os.path.splitext(self._insar.slaveSlc)[0]+'_resamp'+os.path.splitext(self._insar.slaveSlc)[1]
SlaveSlcResampled = self._insar.slaveSlcCoregistered
rangeOffsets2Frac = 0.0
azimuthOffsets2Frac = 0.0
resamp(self._insar.slaveSlc,
SlaveSlcResampled,
'rg.off',
'az.off',
masterTrack.numberOfSamples, masterTrack.numberOfLines,
slaveTrack.prf,
slaveTrack.dopplerVsPixel,
[rangeOffsets2Frac, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0],
[azimuthOffsets2Frac, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0])
create_xml(SlaveSlcResampled, masterTrack.numberOfSamples, masterTrack.numberOfLines, 'slc')
if self.estimateResidualOffset:
numberOfOffsets = 800
rangeStep = 50
length = masterTrack.numberOfLines
width = masterTrack.numberOfSamples
waterBodyRadar('lat.rdr', 'lon.rdr', wbdFile, 'wbd.rdr')
wbd=np.memmap('wbd.rdr', dtype=np.int8, mode='r', shape=(length, width))
azimuthStep = int(length/width*rangeStep+0.5)
landRatio = np.sum(wbd[0:length:azimuthStep,0:width:rangeStep]!=-1)/(int(length/azimuthStep)*int(width/rangeStep))
del wbd
if (landRatio <= 0.00125):
print('\n\nWARNING: land area too small for estimating residual slc offsets')
print('do not estimate residual offsets\n\n')
catalog.addItem('warning message', 'land area too small for estimating residual slc offsets', 'runSlcMatch')
else:
numberOfOffsets /= landRatio
#we use equal number of offsets in range and azimuth here
numberOfOffsetsRange = int(np.sqrt(numberOfOffsets)+0.5)
numberOfOffsetsAzimuth = int(np.sqrt(numberOfOffsets)+0.5)
if numberOfOffsetsRange > int(width/2):
numberOfOffsetsRange = int(width/2)
if numberOfOffsetsAzimuth > int(length/2):
numberOfOffsetsAzimuth = int(length/2)
if numberOfOffsetsRange < 10:
numberOfOffsetsRange = 10
if numberOfOffsetsAzimuth < 10:
numberOfOffsetsAzimuth = 10
##########################################
#2. match using ampcor
##########################################
ampcor = Ampcor(name='insarapp_slcs_ampcor')
ampcor.configure()
mSLC = isceobj.createSlcImage()
mSLC.load(self._insar.masterSlc+'.xml')
mSLC.setAccessMode('read')
mSLC.createImage()
sSLC = isceobj.createSlcImage()
sSLC.load(SlaveSlcResampled+'.xml')
sSLC.setAccessMode('read')
sSLC.createImage()
ampcor.setImageDataType1('complex')
ampcor.setImageDataType2('complex')
ampcor.setMasterSlcImage(mSLC)
ampcor.setSlaveSlcImage(sSLC)
#MATCH REGION
#compute an offset at image center to use
rgoff = 0.0
azoff = 0.0
#it seems that we cannot use 0, haven't look into the problem
if rgoff == 0:
rgoff = 1
if azoff == 0:
azoff = 1
firstSample = 1
if rgoff < 0:
firstSample = int(35 - rgoff)
firstLine = 1
if azoff < 0:
firstLine = int(35 - azoff)
ampcor.setAcrossGrossOffset(rgoff)
ampcor.setDownGrossOffset(azoff)
ampcor.setFirstSampleAcross(firstSample)
ampcor.setLastSampleAcross(mSLC.width)
ampcor.setNumberLocationAcross(numberOfOffsetsRange)
ampcor.setFirstSampleDown(firstLine)
ampcor.setLastSampleDown(mSLC.length)
ampcor.setNumberLocationDown(numberOfOffsetsAzimuth)
#MATCH PARAMETERS
#full-aperture mode
if (self._insar.modeCombination == 21) or \
(self._insar.modeCombination == 22) or \
(self._insar.modeCombination == 31) or \
(self._insar.modeCombination == 32):
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(512)
#note this is the half width/length of search area, number of resulting correlation samples: 32*2+1
ampcor.setSearchWindowSizeWidth(32)
ampcor.setSearchWindowSizeHeight(32)
#triggering full-aperture mode matching
ampcor.setWinsizeFilt(8)
ampcor.setOversamplingFactorFilt(64)
#regular mode
else:
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(64)
ampcor.setSearchWindowSizeWidth(16)
ampcor.setSearchWindowSizeHeight(16)
#REST OF THE STUFF
ampcor.setAcrossLooks(1)
ampcor.setDownLooks(1)
ampcor.setOversamplingFactor(64)
ampcor.setZoomWindowSize(16)
#1. The following not set
#Matching Scale for Sample/Line Directions (-) = 1. 1.
#should add the following in Ampcor.py?
#if not set, in this case, Ampcor.py'value is also 1. 1.
#ampcor.setScaleFactorX(1.)
#ampcor.setScaleFactorY(1.)
#MATCH THRESHOLDS AND DEBUG DATA
#2. The following not set
#in roi_pac the value is set to 0 1
#in isce the value is set to 0.001 1000.0
#SNR and Covariance Thresholds (-) = {s1} {s2}
#should add the following in Ampcor?
#THIS SHOULD BE THE ONLY THING THAT IS DIFFERENT FROM THAT OF ROI_PAC
#ampcor.setThresholdSNR(0)
#ampcor.setThresholdCov(1)
ampcor.setDebugFlag(False)
ampcor.setDisplayFlag(False)
#in summary, only two things not set which are indicated by 'The following not set' above.
#run ampcor
ampcor.ampcor()
offsets = ampcor.getOffsetField()
mSLC.finalizeImage()
sSLC.finalizeImage()
#3. cull offsets
refinedOffsets = cullOffsetsRoipac(offsets, numThreshold=50)
if refinedOffsets == None:
print('\n\nWARNING: too few offsets left for slc residual offset estimation')
print('do not estimate residual offsets\n\n')
catalog.addItem('warning message', 'too few offsets left for slc residual offset estimation', 'runSlcMatch')
else:
rangeOffset, azimuthOffset = meanOffset(refinedOffsets)
os.remove(SlaveSlcResampled)
os.remove(SlaveSlcResampled+'.vrt')
os.remove(SlaveSlcResampled+'.xml')
rangeOffsets2Frac = rangeOffset
azimuthOffsets2Frac = azimuthOffset
resamp(self._insar.slaveSlc,
SlaveSlcResampled,
'rg.off',
'az.off',
masterTrack.numberOfSamples, masterTrack.numberOfLines,
slaveTrack.prf,
slaveTrack.dopplerVsPixel,
[rangeOffsets2Frac, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0],
[azimuthOffsets2Frac, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0])
create_xml(SlaveSlcResampled, masterTrack.numberOfSamples, masterTrack.numberOfLines, 'slc')
catalog.addItem('number of offsets range', numberOfOffsetsRange, 'runSlcMatch')
catalog.addItem('number of offsets azimuth', numberOfOffsetsAzimuth, 'runSlcMatch')
catalog.addItem('range residual offset after geometric coregistration', rangeOffset, 'runSlcMatch')
catalog.addItem('azimuth residual offset after geometric coregistration', azimuthOffset, 'runSlcMatch')
if self.deleteGeometryFiles:
os.remove('lat.rdr')
os.remove('lat.rdr.vrt')
os.remove('lat.rdr.xml')
os.remove('lon.rdr')
os.remove('lon.rdr.vrt')
os.remove('lon.rdr.xml')
os.remove('hgt.rdr')
os.remove('hgt.rdr.vrt')
os.remove('hgt.rdr.xml')
os.remove('los.rdr')
os.remove('los.rdr.vrt')
os.remove('los.rdr.xml')
# if os.path.isfile('wbd.rdr'):
# os.remove('wbd.rdr')
# os.remove('wbd.rdr.vrt')
# os.remove('wbd.rdr.xml')
#########################################################################################
os.chdir('../')
catalog.printToLog(logger, "runSlcMatch")
self._insar.procDoc.addAllFromCatalog(catalog)
def run(frame1,
frame2,
formSlc1,
formSlc2,
imSlc1,
imSlc2,
nstages,
scale,
infos,
stdWriter,
catalog=None,
sceneid='NO_ID'):
logger.info(
"Calculate offset between slcs using %d stages of ampcor: %s " %
(nstages, sceneid))
prf1 = frame1.getInstrument().getPulseRepetitionFrequency()
prf2 = frame2.getInstrument().getPulseRepetitionFrequency()
nearRange1 = formSlc1.startingRange
nearRange2 = formSlc2.startingRange
fs1 = frame1.getInstrument().getRangeSamplingRate()
fs2 = frame2.getInstrument().getRangeSamplingRate()
###There seems to be no other way of determining image length - Piyush
patchSize = infos['patchSize']
numPatches = infos['numberPatches']
valid_az_samples = infos['numberValidPulses']
firstAc = infos['firstSampleAcrossPrf']
firstDown = infos['firstSampleDownPrf']
numLocationAcross = infos['numberLocationAcrossPrf']
numLocationDown = infos['numberLocationDownPrf']
delRg1 = CN.SPEED_OF_LIGHT / (2 * fs1)
delRg2 = CN.SPEED_OF_LIGHT / (2 * fs2)
grossRg = infos['grossRg']
if grossRg is not None:
coarseAcross = grossRg
else:
coarseRange = (nearRange1 - nearRange2) / delRg2
coarseAcross = int(coarseRange + 0.5)
if (coarseRange <= 0):
coarseAcross = int(coarseRange - 0.5)
grossAz = infos['grossAz']
if grossAz is not None:
coarseDown = grossAz
else:
s1 = formSlc1.mocompPosition[1][0]
s1_2 = formSlc1.mocompPosition[1][1]
s2 = formSlc2.mocompPosition[1][0]
s2_2 = formSlc2.mocompPosition[1][1]
coarseAz = int((s1 - s2) / (s2_2 - s2) + prf2 * (1 / prf1 - 1 / prf2) *
(patchSize - valid_az_samples) / 2)
coarseDown = int(coarseAz + 0.5)
if (coarseAz <= 0):
coarseDown = int(coarseAz - 0.5)
coarseAcross = 0 + coarseAcross
coarseDown = 0 + coarseDown
mSlc = isceobj.createSlcImage()
IU.copyAttributes(imSlc1, mSlc)
accessMode = 'read'
mSlc.setAccessMode(accessMode)
mSlc.createImage()
masterWidth = mSlc.getWidth()
masterLength = mSlc.getLength()
sSlc = isceobj.createSlcImage()
IU.copyAttributes(imSlc2, sSlc)
accessMode = 'read'
sSlc.setAccessMode(accessMode)
sSlc.createImage()
slaveWidth = sSlc.getWidth()
slaveLength = sSlc.getLength()
finalIteration = False
for iterNum in xrange(nstages - 1, -1, -1):
####Rewind the images
try:
mSlc.rewind()
sSlc.rewind()
except:
print('Issues when rewinding images.'
) #KK shouldn't it be an error? sys.exit
######
logger.debug('Starting Iteration Stage : %d' % (iterNum))
logger.debug("Gross Across: %s" % (coarseAcross))
logger.debug("Gross Down: %s" % (coarseDown))
####Clear objs
objAmpcor = None
objOff = None
offField = None
objAmpcor = Ampcor()
objAmpcor.setImageDataType1('complex')
objAmpcor.setImageDataType2('complex')
objAmpcor.setFirstPRF(prf1)
objAmpcor.setSecondPRF(prf2)
objAmpcor.setFirstRangeSpacing(delRg1)
objAmpcor.setSecondRangeSpacing(delRg2)
#####Scale all the reference and search windows
scaleFactor = scale**iterNum
objAmpcor.windowSizeWidth *= scaleFactor
objAmpcor.windowSizeHeight *= scaleFactor
objAmpcor.searchWindowSizeWidth *= scaleFactor
objAmpcor.searchWindowSizeHeight *= scaleFactor
xMargin = 2 * objAmpcor.searchWindowSizeWidth + objAmpcor.windowSizeWidth
yMargin = 2 * objAmpcor.searchWindowSizeHeight + objAmpcor.windowSizeHeight
#####Set image limits for search
offAc = max(firstAc, -coarseAcross) + xMargin
offDn = max(firstDown, -coarseDown) + yMargin
offAcmax = int(coarseAcross + ((fs2 / fs1) - 1) * masterWidth)
logger.debug("Gross Max Across: %s" % (offAcmax))
lastAc = int(min(masterWidth, slaveWidth - offAcmax) - xMargin)
offDnmax = int(coarseDown + ((prf2 / prf1) - 1) * masterLength)
logger.debug("Gross Max Down: %s" % (offDnmax))
lastDn = int(min(masterLength, slaveLength - offDnmax) - yMargin)
objAmpcor.setFirstSampleAcross(offAc)
objAmpcor.setLastSampleAcross(lastAc)
objAmpcor.setFirstSampleDown(offDn)
objAmpcor.setLastSampleDown(lastDn)
objAmpcor.setAcrossGrossOffset(coarseAcross)
objAmpcor.setDownGrossOffset(coarseDown)
if (offAc > lastAc) or (offDn > lastDn):
print('Search window scale is too large.')
print('Skipping Scale: %d' % (iterNum + 1))
continue
logger.debug('Looks = %d' % scaleFactor)
logger.debug('Correlation window sizes: %d %d' %
(objAmpcor.windowSizeWidth, objAmpcor.windowSizeHeight))
logger.debug('Search window sizes: %d %d' %
(objAmpcor.searchWindowSizeWidth,
objAmpcor.searchWindowSizeHeight))
logger.debug(' Across pos: %d %d out of (%d,%d)' %
(objAmpcor.firstSampleAcross, objAmpcor.lastSampleAcross,
masterWidth, slaveWidth))
logger.debug(' Down pos: %d %d out of (%d,%d)' %
(objAmpcor.firstSampleDown, objAmpcor.lastSampleDown,
masterLength, slaveLength))
if (iterNum == 0) or finalIteration:
if catalog is not None:
# Record the inputs
isceobj.Catalog.recordInputs(catalog, objAmpcor,
"runOffsetprf.%s" % sceneid,
logger,
"runOffsetprf.%s" % sceneid)
objAmpcor.setNumberLocationAcross(numLocationAcross)
objAmpcor.setNumberLocationDown(numLocationDown)
else:
objAmpcor.setNumberLocationAcross(10)
objAmpcor.setNumberLocationDown(10)
objAmpcor.setAcrossLooks(scaleFactor)
objAmpcor.setDownLooks(scaleFactor)
objAmpcor.setZoomWindowSize(scale * objAmpcor.zoomWindowSize)
objAmpcor.setOversamplingFactor(2)
objAmpcor.ampcor(mSlc, sSlc)
offField = objAmpcor.getOffsetField()
if (iterNum == 0) or finalIteration:
if catalog is not None:
# Record the outputs
isceobj.Catalog.recordOutputs(catalog, objAmpcor,
"runOffsetprf.%s" % sceneid,
logger,
"runOffsetprf.%s" % sceneid)
else:
objOff = isceobj.createOffoutliers()
objOff.wireInputPort(name='offsets', object=offField)
objOff.setSNRThreshold(2.0)
objOff.setDistance(10)
objOff.setStdWriter = stdWriter.set_file_tags(
"nstage_offoutliers" + str(iterNum), "log", "err", "out")
objOff.offoutliers()
coarseAcross = int(objOff.averageOffsetAcross)
coarseDown = int(objOff.averageOffsetDown)
mSlc.finalizeImage()
sSlc.finalizeImage()
objOff = None
objAmpcor = None
return offField
def runOffsetprf(self):
from isceobj.Catalog import recordInputs
logger.info("Calculate offset between slcs using ampcor")
masterFrame = self._insar.getMasterFrame()
slaveFrame = self._insar.getSlaveFrame()
masterOrbit = self._insar.getMasterOrbit()
slaveOrbit = self._insar.getSlaveOrbit()
prf1 = masterFrame.getInstrument().getPulseRepetitionFrequency()
prf2 = slaveFrame.getInstrument().getPulseRepetitionFrequency()
nearRange1 = self.insar.formSLC1.startingRange
nearRange2 = self.insar.formSLC2.startingRange
fs1 = masterFrame.getInstrument().getRangeSamplingRate()
fs2 = slaveFrame.getInstrument().getRangeSamplingRate()
###There seems to be no other way of determining image length - Piyush
patchSize = self._insar.getPatchSize()
numPatches = self._insar.getNumberPatches()
valid_az_samples = self._insar.getNumberValidPulses()
firstAc = self._insar.getFirstSampleAcrossPrf()
firstDown = self._insar.getFirstSampleDownPrf()
numLocationAcross = self._insar.getNumberLocationAcrossPrf()
numLocationDown = self._insar.getNumberLocationDownPrf()
delRg1 = CN.SPEED_OF_LIGHT / (2 * fs1)
delRg2 = CN.SPEED_OF_LIGHT / (2 * fs2)
coarseRange = (nearRange1 - nearRange2) / delRg2
coarseAcross = int(coarseRange + 0.5)
if (coarseRange <= 0):
coarseAcross = int(coarseRange - 0.5)
pass
if self.grossRg is not None:
coarseAcross = self.grossRg
pass
s1 = self.insar.formSLC1.mocompPosition[1][0]
s1_2 = self.insar.formSLC1.mocompPosition[1][1]
s2 = self.insar.formSLC2.mocompPosition[1][0]
s2_2 = self.insar.formSLC2.mocompPosition[1][1]
coarseAz = int((s1 - s2) / (s2_2 - s2) + prf2 * (1 / prf1 - 1 / prf2) *
(patchSize - valid_az_samples) / 2)
coarseDown = int(coarseAz + 0.5)
if (coarseAz <= 0):
coarseDown = int(coarseAz - 0.5)
pass
if self.grossAz is not None:
coarseDown = self.grossAz
pass
coarseAcross = 0 + coarseAcross
coarseDown = 0 + coarseDown
mSlcImage = self._insar.getMasterSlcImage()
mSlc = isceobj.createSlcImage()
IU.copyAttributes(mSlcImage, mSlc)
accessMode = 'read'
mSlc.setAccessMode(accessMode)
mSlc.createImage()
masterWidth = mSlc.getWidth()
masterLength = mSlc.getLength()
sSlcImage = self._insar.getSlaveSlcImage()
sSlc = isceobj.createSlcImage()
IU.copyAttributes(sSlcImage, sSlc)
accessMode = 'read'
sSlc.setAccessMode(accessMode)
sSlc.createImage()
slaveWidth = sSlc.getWidth()
slaveLength = sSlc.getLength()
objAmpcor = Ampcor(name='insarapp_slcs_ampcor')
objAmpcor.configure()
objAmpcor.setImageDataType1('complex')
objAmpcor.setImageDataType2('complex')
if objAmpcor.acrossGrossOffset:
coarseAcross = objAmpcor.acrossGrossOffset
if objAmpcor.downGrossOffset:
coarseDown = objAmpcor.downGrossOffset
logger.debug("Gross Across: %s" % (coarseAcross))
logger.debug("Gross Down: %s" % (coarseDown))
xMargin = 2 * objAmpcor.searchWindowSizeWidth + objAmpcor.windowSizeWidth
yMargin = 2 * objAmpcor.searchWindowSizeHeight + objAmpcor.windowSizeHeight
#####Compute image positions
offAc = max(firstAc, -coarseAcross) + xMargin
offDn = max(firstDown, -coarseDown) + yMargin
offAcmax = int(coarseAcross + ((fs2 / fs1) - 1) * masterWidth)
logger.debug("Gross Max Across: %s" % (offAcmax))
lastAc = int(min(masterWidth, slaveWidth - offAcmax) - xMargin)
offDnmax = int(coarseDown + ((prf2 / prf1) - 1) * masterLength)
logger.debug("Gross Max Down: %s" % (offDnmax))
lastDown = int(min(masterLength, slaveLength - offDnmax) - yMargin)
if not objAmpcor.firstSampleAcross:
objAmpcor.setFirstSampleAcross(offAc)
if not objAmpcor.lastSampleAcross:
objAmpcor.setLastSampleAcross(lastAc)
if not objAmpcor.numberLocationAcross:
objAmpcor.setNumberLocationAcross(numLocationAcross)
if not objAmpcor.firstSampleDown:
objAmpcor.setFirstSampleDown(offDn)
if not objAmpcor.lastSampleDown:
objAmpcor.setLastSampleDown(lastDown)
if not objAmpcor.numberLocationDown:
objAmpcor.setNumberLocationDown(numLocationDown)
#####Override gross offsets if not provided
if not objAmpcor.acrossGrossOffset:
objAmpcor.setAcrossGrossOffset(coarseAcross)
if not objAmpcor.downGrossOffset:
objAmpcor.setDownGrossOffset(coarseDown)
#####User inputs are overriden here
objAmpcor.setFirstPRF(prf1)
objAmpcor.setSecondPRF(prf2)
objAmpcor.setFirstRangeSpacing(delRg1)
objAmpcor.setSecondRangeSpacing(delRg2)
# Record the inputs
recordInputs(self._insar.procDoc, objAmpcor, "runOffsetprf", logger,
"runOffsetprf")
objAmpcor.ampcor(mSlc, sSlc)
# Record the outputs
from isceobj.Catalog import recordOutputs
recordOutputs(self._insar.procDoc, objAmpcor, "runOffsetprf", logger,
"runOffsetprf")
mSlc.finalizeImage()
sSlc.finalizeImage()
# save the input offset field for the record
self._insar.setOffsetField(objAmpcor.getOffsetField())
self._insar.setRefinedOffsetField(objAmpcor.getOffsetField())
def runRdrDemOffset(self):
'''estimate between radar image and dem
'''
catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
self.updateParamemetersFromUser()
referenceTrack = self._insar.loadTrack(reference=True)
demFile = os.path.abspath(self._insar.dem)
insarDir = 'insar'
os.makedirs(insarDir, exist_ok=True)
os.chdir(insarDir)
rdrDemDir = 'rdr_dem_offset'
os.makedirs(rdrDemDir, exist_ok=True)
os.chdir(rdrDemDir)
##################################################################################################
#compute dem pixel size
demImage = isceobj.createDemImage()
demImage.load(demFile + '.xml')
#DEM pixel size in meters (appoximate value)
demDeltaLon = abs(demImage.getDeltaLongitude()) / 0.0002777777777777778 * 30.0
demDeltaLat = abs(demImage.getDeltaLatitude()) / 0.0002777777777777778 * 30.0
#number of looks to take in range
if self._insar.numberRangeLooksSim == None:
if self._insar.numberRangeLooks1 * referenceTrack.rangePixelSize > demDeltaLon:
self._insar.numberRangeLooksSim = 1
else:
self._insar.numberRangeLooksSim = int(demDeltaLon / (self._insar.numberRangeLooks1 * referenceTrack.rangePixelSize) + 0.5)
#number of looks to take in azimuth
if self._insar.numberAzimuthLooksSim == None:
if self._insar.numberAzimuthLooks1 * referenceTrack.azimuthPixelSize > demDeltaLat:
self._insar.numberAzimuthLooksSim = 1
else:
self._insar.numberAzimuthLooksSim = int(demDeltaLat / (self._insar.numberAzimuthLooks1 * referenceTrack.azimuthPixelSize) + 0.5)
#simulate a radar image using dem
simulateRadar(os.path.join('../', self._insar.height), self._insar.sim, scale=3.0, offset=100.0)
sim = isceobj.createImage()
sim.load(self._insar.sim+'.xml')
#take looks
if (self._insar.numberRangeLooksSim == 1) and (self._insar.numberAzimuthLooksSim == 1):
simLookFile = self._insar.sim
ampLookFile = 'amp_{}rlks_{}alks.float'.format(self._insar.numberRangeLooksSim*self._insar.numberRangeLooks1,
self._insar.numberAzimuthLooksSim*self._insar.numberAzimuthLooks1)
cmd = "imageMath.py -e='sqrt(a_0*a_0+a_1*a_1)' --a={} -o {} -t float".format(os.path.join('../', self._insar.amplitude), ampLookFile)
runCmd(cmd)
else:
simLookFile = 'sim_{}rlks_{}alks.float'.format(self._insar.numberRangeLooksSim*self._insar.numberRangeLooks1,
self._insar.numberAzimuthLooksSim*self._insar.numberAzimuthLooks1)
ampLookFile = 'amp_{}rlks_{}alks.float'.format(self._insar.numberRangeLooksSim*self._insar.numberRangeLooks1,
self._insar.numberAzimuthLooksSim*self._insar.numberAzimuthLooks1)
ampTmpFile = 'amp_tmp.float'
look(self._insar.sim, simLookFile, sim.width, self._insar.numberRangeLooksSim, self._insar.numberAzimuthLooksSim, 2, 0, 1)
look(os.path.join('../', self._insar.amplitude), ampTmpFile, sim.width, self._insar.numberRangeLooksSim, self._insar.numberAzimuthLooksSim, 4, 1, 1)
width = int(sim.width/self._insar.numberRangeLooksSim)
length = int(sim.length/self._insar.numberAzimuthLooksSim)
create_xml(simLookFile, width, length, 'float')
create_xml(ampTmpFile, width, length, 'amp')
cmd = "imageMath.py -e='sqrt(a_0*a_0+a_1*a_1)' --a={} -o {} -t float".format(ampTmpFile, ampLookFile)
runCmd(cmd)
os.remove(ampTmpFile)
os.remove(ampTmpFile+'.vrt')
os.remove(ampTmpFile+'.xml')
#initial number of offsets to use
numberOfOffsets = 800
#compute land ratio to further determine the number of offsets to use
wbd=np.memmap(os.path.join('../', self._insar.wbdOut), dtype='byte', mode='r', shape=(sim.length, sim.width))
landRatio = np.sum(wbd[0:sim.length:10, 0:sim.width:10]!=-1) / int(sim.length/10) / int(sim.width/10)
del wbd
if (landRatio <= 0.00125):
print('\n\nWARNING: land area too small for estimating offsets between radar and dem')
print('do not estimate offsets between radar and dem\n\n')
self._insar.radarDemAffineTransform = [1.0, 0.0, 0.0, 1.0, 0.0, 0.0]
catalog.addItem('warning message', 'land area too small for estimating offsets between radar and dem', 'runRdrDemOffset')
os.chdir('../../')
catalog.printToLog(logger, "runRdrDemOffset")
self._insar.procDoc.addAllFromCatalog(catalog)
return
#total number of offsets to use
numberOfOffsets /= landRatio
#allocate number of offsets in range/azimuth according to image width/length
width = int(sim.width/self._insar.numberRangeLooksSim)
length = int(sim.length/self._insar.numberAzimuthLooksSim)
#number of offsets to use in range/azimuth
numberOfOffsetsRange = int(np.sqrt(numberOfOffsets * width / length))
numberOfOffsetsAzimuth = int(length / width * np.sqrt(numberOfOffsets * width / length))
#this should be better?
numberOfOffsetsRange = int(np.sqrt(numberOfOffsets))
numberOfOffsetsAzimuth = int(np.sqrt(numberOfOffsets))
if numberOfOffsetsRange > int(width/2):
numberOfOffsetsRange = int(width/2)
if numberOfOffsetsAzimuth > int(length/2):
numberOfOffsetsAzimuth = int(length/2)
if numberOfOffsetsRange < 10:
numberOfOffsetsRange = 10
if numberOfOffsetsAzimuth < 10:
numberOfOffsetsAzimuth = 10
catalog.addItem('number of range offsets', '{}'.format(numberOfOffsetsRange), 'runRdrDemOffset')
catalog.addItem('number of azimuth offsets', '{}'.format(numberOfOffsetsAzimuth), 'runRdrDemOffset')
#matching
ampcor = Ampcor(name='insarapp_slcs_ampcor')
ampcor.configure()
mMag = isceobj.createImage()
mMag.load(ampLookFile+'.xml')
mMag.setAccessMode('read')
mMag.createImage()
sMag = isceobj.createImage()
sMag.load(simLookFile+'.xml')
sMag.setAccessMode('read')
sMag.createImage()
ampcor.setImageDataType1('real')
ampcor.setImageDataType2('real')
ampcor.setReferenceSlcImage(mMag)
ampcor.setSecondarySlcImage(sMag)
#MATCH REGION
rgoff = 0
azoff = 0
#it seems that we cannot use 0, haven't look into the problem
if rgoff == 0:
rgoff = 1
if azoff == 0:
azoff = 1
firstSample = 1
if rgoff < 0:
firstSample = int(35 - rgoff)
firstLine = 1
if azoff < 0:
firstLine = int(35 - azoff)
ampcor.setAcrossGrossOffset(rgoff)
ampcor.setDownGrossOffset(azoff)
ampcor.setFirstSampleAcross(firstSample)
ampcor.setLastSampleAcross(width)
ampcor.setNumberLocationAcross(numberOfOffsetsRange)
ampcor.setFirstSampleDown(firstLine)
ampcor.setLastSampleDown(length)
ampcor.setNumberLocationDown(numberOfOffsetsAzimuth)
#MATCH PARAMETERS
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(64)
#note this is the half width/length of search area, so number of resulting correlation samples: 8*2+1
ampcor.setSearchWindowSizeWidth(16)
ampcor.setSearchWindowSizeHeight(16)
#REST OF THE STUFF
ampcor.setAcrossLooks(1)
ampcor.setDownLooks(1)
ampcor.setOversamplingFactor(64)
ampcor.setZoomWindowSize(16)
#1. The following not set
#Matching Scale for Sample/Line Directions (-) = 1. 1.
#should add the following in Ampcor.py?
#if not set, in this case, Ampcor.py'value is also 1. 1.
#ampcor.setScaleFactorX(1.)
#ampcor.setScaleFactorY(1.)
#MATCH THRESHOLDS AND DEBUG DATA
#2. The following not set
#in roi_pac the value is set to 0 1
#in isce the value is set to 0.001 1000.0
#SNR and Covariance Thresholds (-) = {s1} {s2}
#should add the following in Ampcor?
#THIS SHOULD BE THE ONLY THING THAT IS DIFFERENT FROM THAT OF ROI_PAC
#ampcor.setThresholdSNR(0)
#ampcor.setThresholdCov(1)
ampcor.setDebugFlag(False)
ampcor.setDisplayFlag(False)
#in summary, only two things not set which are indicated by 'The following not set' above.
#run ampcor
ampcor.ampcor()
offsets = ampcor.getOffsetField()
ampcorOffsetFile = 'ampcor.off'
cullOffsetFile = 'cull.off'
affineTransformFile = 'affine_transform.txt'
writeOffset(offsets, ampcorOffsetFile)
#finalize image, and re-create it
#otherwise the file pointer is still at the end of the image
mMag.finalizeImage()
sMag.finalizeImage()
# #cull offsets
# import io
# from contextlib import redirect_stdout
# f = io.StringIO()
# with redirect_stdout(f):
# fitoff(ampcorOffsetFile, cullOffsetFile, 1.5, .5, 50)
# s = f.getvalue()
# #print(s)
# with open(affineTransformFile, 'w') as f:
# f.write(s)
#cull offsets
import subprocess
proc = subprocess.Popen(["python3", "-c", "import isce; from contrib.alos2proc_f.alos2proc_f import fitoff; fitoff('ampcor.off', 'cull.off', 1.5, .5, 50)"], stdout=subprocess.PIPE)
out = proc.communicate()[0]
with open(affineTransformFile, 'w') as f:
f.write(out.decode('utf-8'))
#check number of offsets left
with open(cullOffsetFile, 'r') as f:
numCullOffsets = sum(1 for linex in f)
if numCullOffsets < 50:
print('\n\nWARNING: too few points left after culling, {} left'.format(numCullOffsets))
print('do not estimate offsets between radar and dem\n\n')
self._insar.radarDemAffineTransform = [1.0, 0.0, 0.0, 1.0, 0.0, 0.0]
catalog.addItem('warning message', 'too few points left after culling, {} left'.format(numCullOffsets), 'runRdrDemOffset')
os.chdir('../../')
catalog.printToLog(logger, "runRdrDemOffset")
self._insar.procDoc.addAllFromCatalog(catalog)
return
#read affine transform parameters
with open(affineTransformFile) as f:
lines = f.readlines()
i = 0
for linex in lines:
if 'Affine Matrix ' in linex:
m11 = float(lines[i + 2].split()[0])
m12 = float(lines[i + 2].split()[1])
m21 = float(lines[i + 3].split()[0])
m22 = float(lines[i + 3].split()[1])
t1 = float(lines[i + 7].split()[0])
t2 = float(lines[i + 7].split()[1])
break
i += 1
self._insar.radarDemAffineTransform = [m11, m12, m21, m22, t1, t2]
##################################################################################################
os.chdir('../../')
catalog.printToLog(logger, "runRdrDemOffset")
self._insar.procDoc.addAllFromCatalog(catalog)
def estimateFrameOffset(swath1, swath2, image1, image2, matchingMode=0):
'''
estimate offset of two adjacent frames using matching
matchingMode: 0: ScanSAR full-aperture image
1: regular image
'''
import isceobj
from isceobj.Alos2Proc.Alos2ProcPublic import cullOffsets
from isceobj.Alos2Proc.Alos2ProcPublic import cullOffsetsRoipac
from isceobj.Alos2Proc.Alos2ProcPublic import meanOffset
from mroipac.ampcor.Ampcor import Ampcor
##########################################
#2. match using ampcor
##########################################
ampcor = Ampcor(name='insarapp_slcs_ampcor')
ampcor.configure()
#mSLC = isceobj.createSlcImage()
mSLC = isceobj.createImage()
mSLC.load(image1 + '.xml')
mSLC.setFilename(image1)
#mSLC.extraFilename = image1 + '.vrt'
mSLC.setAccessMode('read')
mSLC.createImage()
#sSLC = isceobj.createSlcImage()
sSLC = isceobj.createImage()
sSLC.load(image2 + '.xml')
sSLC.setFilename(image2)
#sSLC.extraFilename = image2 + '.vrt'
sSLC.setAccessMode('read')
sSLC.createImage()
if mSLC.dataType.upper() == 'CFLOAT':
ampcor.setImageDataType1('complex')
ampcor.setImageDataType2('complex')
elif mSLC.dataType.upper() == 'FLOAT':
ampcor.setImageDataType1('real')
ampcor.setImageDataType2('real')
else:
raise Exception('file type not supported yet.')
ampcor.setMasterSlcImage(mSLC)
ampcor.setSlaveSlcImage(sSLC)
#MATCH REGION
#compute an offset at image center to use
rgoff = -(swath2.startingRange -
swath1.startingRange) / swath1.rangePixelSize
azoff = -(
(swath2.sensingStart -
swath1.sensingStart).total_seconds()) / swath1.azimuthLineInterval
rgoff = int(rgoff)
azoff = int(azoff)
#it seems that we cannot use 0, haven't look into the problem
if rgoff == 0:
rgoff = 1
if azoff == 0:
azoff = 1
firstSample = 1
if rgoff < 0:
firstSample = int(35 - rgoff)
firstLine = 1
if azoff < 0:
firstLine = int(35 - azoff)
ampcor.setAcrossGrossOffset(rgoff)
ampcor.setDownGrossOffset(azoff)
ampcor.setFirstSampleAcross(firstSample)
ampcor.setLastSampleAcross(mSLC.width)
ampcor.setNumberLocationAcross(30)
ampcor.setFirstSampleDown(firstLine)
ampcor.setLastSampleDown(mSLC.length)
ampcor.setNumberLocationDown(10)
#MATCH PARAMETERS
#full-aperture mode
if matchingMode == 0:
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(512)
#note this is the half width/length of search area, number of resulting correlation samples: 32*2+1
ampcor.setSearchWindowSizeWidth(32)
ampcor.setSearchWindowSizeHeight(32)
#triggering full-aperture mode matching
ampcor.setWinsizeFilt(8)
ampcor.setOversamplingFactorFilt(64)
#regular mode
else:
ampcor.setWindowSizeWidth(64)
ampcor.setWindowSizeHeight(64)
ampcor.setSearchWindowSizeWidth(32)
ampcor.setSearchWindowSizeHeight(32)
#REST OF THE STUFF
ampcor.setAcrossLooks(1)
ampcor.setDownLooks(1)
ampcor.setOversamplingFactor(64)
ampcor.setZoomWindowSize(16)
#1. The following not set
#Matching Scale for Sample/Line Directions (-) = 1. 1.
#should add the following in Ampcor.py?
#if not set, in this case, Ampcor.py'value is also 1. 1.
#ampcor.setScaleFactorX(1.)
#ampcor.setScaleFactorY(1.)
#MATCH THRESHOLDS AND DEBUG DATA
#2. The following not set
#in roi_pac the value is set to 0 1
#in isce the value is set to 0.001 1000.0
#SNR and Covariance Thresholds (-) = {s1} {s2}
#should add the following in Ampcor?
#THIS SHOULD BE THE ONLY THING THAT IS DIFFERENT FROM THAT OF ROI_PAC
#ampcor.setThresholdSNR(0)
#ampcor.setThresholdCov(1)
ampcor.setDebugFlag(False)
ampcor.setDisplayFlag(False)
#in summary, only two things not set which are indicated by 'The following not set' above.
#run ampcor
ampcor.ampcor()
offsets = ampcor.getOffsetField()
#ampcorOffsetFile = 'ampcor.off'
#writeOffset(offsets, ampcorOffsetFile)
#finalize image, and re-create it
#otherwise the file pointer is still at the end of the image
mSLC.finalizeImage()
sSLC.finalizeImage()
#############################################
#3. cull offsets
#############################################
#refinedOffsets = cullOffsets(offsets)
refinedOffsets = cullOffsetsRoipac(offsets, numThreshold=50)
if refinedOffsets != None:
rangeOffset, azimuthOffset = meanOffset(refinedOffsets)
return (rangeOffset, azimuthOffset)
else:
return None
def estimateOffsetField(burst, simfile,offset=0.0):
'''
Estimate offset field between burst and simamp.
'''
sim = isceobj.createImage()
sim.load(simfile+'.xml')
sim.setAccessMode('READ')
sim.createImage()
sar = isceobj.createSlcImage()
sar.load(burst.getImage().filename + '.xml')
sar.setAccessMode('READ')
sar.createImage()
width = sar.getWidth()
length = sar.getLength()
objOffset = Ampcor(name='reference_offset')
objOffset.configure()
objOffset.setWindowSizeWidth(128)
objOffset.setWindowSizeHeight(128)
objOffset.setSearchWindowSizeWidth(16)
objOffset.setSearchWindowSizeHeight(16)
margin = 2*objOffset.searchWindowSizeWidth + objOffset.windowSizeWidth
nAcross = 40
nDown = 40
if not objOffset.firstSampleAcross:
objOffset.setFirstSampleAcross(margin+101)
if not objOffset.lastSampleAcross:
objOffset.setLastSampleAcross(width-margin-101)
if not objOffset.firstSampleDown:
objOffset.setFirstSampleDown(margin+offset+101)
if not objOffset.lastSampleDown:
objOffset.setLastSampleDown(length - margin-101)
if not objOffset.acrossGrossOffset:
objOffset.setAcrossGrossOffset(0.0)
if not objOffset.downGrossOffset:
objOffset.setDownGrossOffset(offset)
if not objOffset.numberLocationAcross:
objOffset.setNumberLocationAcross(nAcross)
if not objOffset.numberLocationDown:
objOffset.setNumberLocationDown(nDown)
objOffset.setFirstPRF(1.0)
objOffset.setSecondPRF(1.0)
objOffset.setImageDataType1('complex')
objOffset.setImageDataType2('real')
objOffset.ampcor(sar, sim)
sar.finalizeImage()
sim.finalizeImage()
result = objOffset.getOffsetField()
return result