def open(file, band_file=None):
'''
Returns a SpyFile object for an AVIRIS image file.
Arguments:
`file` (str):
Name of the AVIRIS data file.
`band_file` (str):
Optional name of the AVIRIS spectral calibration file.
Returns:
A SpyFile object for the image file.
Raises:
spectral.io.spyfile.InvalidFileError
'''
import numpy as np
from spectral.io.bipfile import BipFile
import os
import glob
from .spyfile import find_file_path, InvalidFileError
import spectral
class Params:
pass
p = Params()
p.filename = find_file_path(file)
p.nbands = 224
p.ncols = 614
fileSize = os.stat(p.filename)[6]
if fileSize % 275072 != 0:
raise InvalidFileError('File size not consistent with AVIRIS format.')
p.nrows = int(fileSize / 275072)
p.byte_order = 1
p.dtype = np.dtype('i2').str
if spectral.byte_order != 1:
p.dtype = np.dtype(p.dtype).newbyteorder().str
metadata = {'default bands': ['29', '18', '8']}
p.offset = 0
img = BipFile(p, metadata)
img.scale_factor = 10000.0
if band_file:
img.bands = read_aviris_bands(find_file_path(band_file))
return img
def open(file, band_file=None):
'''
Returns a SpyFile object for an AVIRIS image file.
Arguments:
`file` (str):
Name of the AVIRIS data file.
`band_file` (str):
Optional name of the AVIRIS spectral calibration file.
Returns:
A SpyFile object for the image file.
Raises:
IOError
'''
import numpy as np
from spectral.io.bipfile import BipFile
import os
import glob
from exceptions import IOError
from spyfile import find_file_path
import spectral
class Params:
pass
p = Params()
p.filename = find_file_path(file)
p.nbands = 224
p.ncols = 614
fileSize = os.stat(p.filename)[6]
if fileSize % 275072 != 0:
raise IOError('File size not consistent with AVIRIS format.')
p.nrows = int(fileSize / 275072)
p.byte_order = 1
p.dtype = np.dtype('i2').str
if spectral.byte_order != 1:
p.dtype = np.dtype(p.dtype).newbyteorder().str
metadata = {'default bands': ['29', '18', '8']}
p.offset = 0
img = BipFile(p, metadata)
img.scale_factor = 10000.0
if band_file:
img.bands = read_aviris_bands(find_file_path(band_file))
else:
# Let user know if band cal files are available
fileDir = os.path.split(p.filename)[0]
calFiles = glob.glob(fileDir + '/*.spc')
if len(calFiles) > 0:
print '\nThe following band calibration files are located in ' \
'the same directory as the opened AVIRIS file:\n'
for f in calFiles:
print " " + os.path.split(f)[1]
print '\nTo associate a band calibration file with an AVIRIS ' \
'data file, re-open the AVIRIS file with the following ' \
'syntax:\n'
print ' >>> img = aviris.open(fileName, calFileName)\n'
return img
def open(file, band_file=None):
'''
Returns a SpyFile object for an AVIRIS image file.
Arguments:
`file` (str):
Name of the AVIRIS data file.
`band_file` (str):
Optional name of the AVIRIS spectral calibration file.
Returns:
A SpyFile object for the image file.
Raises:
IOError
'''
import numpy as np
from spectral.io.bipfile import BipFile
import os
import glob
from exceptions import IOError
from .spyfile import find_file_path
import spectral
class Params:
pass
p = Params()
p.filename = find_file_path(file)
p.nbands = 224
p.ncols = 614
fileSize = os.stat(p.filename)[6]
if fileSize % 275072 != 0:
raise IOError('File size not consistent with AVIRIS format.')
p.nrows = int(fileSize / 275072)
p.byte_order = 1
p.dtype = np.dtype('i2').str
if spectral.byte_order != 1:
p.dtype = np.dtype(p.dtype).newbyteorder().str
metadata = {'default bands': ['29', '18', '8']}
p.offset = 0
img = BipFile(p, metadata)
img.scale_factor = 10000.0
if band_file:
img.bands = read_aviris_bands(find_file_path(band_file))
else:
# Let user know if band cal files are available
fileDir = os.path.split(p.filename)[0]
calFiles = glob.glob(fileDir + '/*.spc')
if len(calFiles) > 0:
print('\nThe following band calibration files are located in ' \
'the same directory as the opened AVIRIS file:\n')
for f in calFiles:
print(" " + os.path.split(f)[1])
print('\nTo associate a band calibration file with an AVIRIS ' \
'data file, re-open the AVIRIS file with the following ' \
'syntax:\n')
print(' >>> img = aviris.open(fileName, calFileName)\n')
return img