def block_reader(self, *args, **kwargs):
block = kwargs["block"]
block = [block[2], block[0], block[3] - block[2], block[1] - block[0]]
array = rrat(self.filename, block=block)
# pixel interleaved vector -> band interleaved vector
if array.ndim == 3 and array.shape[2] < array.shape[0] and array.shape[2] < array.shape[1]:
array = np.rollaxis(array, 2)
# pixel interleaved matrix -> band interleaved vector
if (
array.ndim == 4
and array.shape[2] < array.shape[0]
and array.shape[2] < array.shape[1]
and array.shape[3] < array.shape[0]
and array.shape[3] < array.shape[1]
):
array = np.rollaxis(np.rollaxis(array, 2), 3, start=1)
array = np.reshape(array, (array.shape[0] * array.shape[1], array.shape[2], array.shape[3]))
array[~np.isfinite(array)] = 0.0
return array
def reader(self, *args, **kwargs):
fN = len(self.filenames)
meta = {}
if 'ppfiles' in self.__dict__:
pp = Xml2Py(self.ppfiles[0])
meta['sensor'] = 'DLR F-SAR'
meta['band'] = band
meta['prf'] = pp.prf
meta['c0'] = pp.c0
meta['rd'] = pp.rd
meta['rs'] = pp.rsf/subx
meta['lam'] = pp.__dict__['lam']
meta['band'] = pp.band
meta['antdir'] = pp.antdir
meta['v0'] = pp.v0
meta['h0'] = pp.h0
meta['terrain'] = pp.terrain
meta['bw'] = pp.cbw
if (len(self.rat_block) == 4):
meta['rd'] += self.rat_block[0] / meta['rs']
meta['CH_pol'] = [' ']*(fN**2)
pind = 0
for f1 in self.ppfiles:
pp1 = Xml2Py(f1)
for f2 in self.ppfiles:
pp2 = Xml2Py(f2)
meta['CH_pol'][pind] = pp1.polarisation+pp2.polarisation
ppind += 1
file = RatFile(self.filenames[0])
if len(self.rat_block) != 4:
imDim = file.dim[0:2][::-1]
else:
imDim = self.rat_block[2:4][::-1]
imDim = np.asarray(imDim,dtype='i4')
blenOut = 100
blenIn = blenOut*self.suby
nBlocks = int(np.ceil(imDim[0]/float(blenIn)))
sub = np.asarray([self.suby,self.subx],dtype='i4')
oDim = imDim / sub
meta['nrg'] = oDim[0]
meta['naz'] = oDim[1]
P = ProgressBar(' ' + self.name, nBlocks)
P.update(0)
for n in range(nBlocks):
rInd = np.minimum(np.asarray([n*blenIn,(n+1)*blenIn]),imDim[0])
wInd = rInd/sub
if wInd[0] >= wInd[1]:
continue
binInd = [(wInd[1]-wInd[0])*sub[0],oDim[1]*sub[1]]
bDim = (wInd[1]-wInd[0],oDim[1])
for u in range(fN):
blk = [0,rInd[0],imDim[1],rInd[1]-rInd[0]]
if len(self.rat_block) == 4:
blk[0] = self.rat_block[0]
blk[1] += self.rat_block[1]
blk[2] = self.rat_block[2]
arr1 = rrat(self.filenames[u],block=blk)
arr1 = arr1[0:binInd[0],0:binInd[1]]
if (u == 0) and (n == 0):
covar = np.empty((fN,fN)+tuple(oDim),dtype=arr1.dtype)
covar[u,u,wInd[0]:wInd[1],:] = rebin(np.abs(arr1)**2,bDim)
for v in range(u+1,fN):
arr2 = rrat(self.filenames[v],block=blk)
covar[u,v,wInd[0]:wInd[1],:] = rebin(arr1*np.conj(arr2),bDim)
covar[v,u,wInd[0]:wInd[1],:] = np.conj(covar[u,v,wInd[0]:wInd[1],:])
P.update(n+1)
return covar, meta
