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#!/usr/bin/env python3
#
# Author: Piyush Agram
# Copyright 2016
#
# Heresh Fattahi: Adopted for stack processing
import argparse
import numpy as np
import os
import isce
import isceobj
import logging
import datetime
from isceobj.Location.Offset import OffsetField, Offset
from isceobj.Util.decorators import use_api
import s1a_isce_utils as ut
#logger = logging.getLogger('isce.topsinsar.rangecoreg')
def createParser():
parser = argparse.ArgumentParser( description='Estimate range misregistration using overlap bursts')
parser.add_argument('-o', '--out_range', type=str, dest='output', default='misreg.txt',
help='Output textfile with the constant range offset')
parser.add_argument('-t', '--snr_threshold', type=float, dest='offsetSNRThreshold', default=6.0,
help='SNR threshold for overlap masking')
parser.add_argument('-m','--reference', type=str, dest='reference', required=True,
help='Reference image')
parser.add_argument('-s', '--secondary',type=str, dest='secondary', required=True,
help='Secondary image')
return parser
def cmdLineParse(iargs=None):
'''
Command line parser.
'''
parser = createParser()
return parser.parse_args(args=iargs)
def runAmpcor(reference, secondary):
'''
Run one ampcor process.
'''
import isceobj
from mroipac.ampcor.Ampcor import Ampcor
mImg = isceobj.createSlcImage()
mImg.load(reference + '.xml')
mImg.setAccessMode('READ')
mImg.createImage()
sImg = isceobj.createSlcImage()
sImg.load(secondary + '.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 main(iargs=None):
inps = cmdLineParse(iargs)
'''
Estimate constant offset in range.
'''
#if not self.doESD:
# return
#catalog = isceobj.Catalog.createCatalog(self._insar.procDoc.name)
#swathList = self._insar.getValidSwathList(self.swaths)
referenceSwathList = ut.getSwathList(os.path.join(inps.reference, 'overlap'))
secondarySwathList = ut.getSwathList(os.path.join(inps.secondary, 'overlap'))
swathList = list(sorted(set(referenceSwathList+secondarySwathList)))
rangeOffsets = []
snr = []
for swath in swathList:
#if self._insar.numberOfCommonBursts[swath-1] < 2:
# print('Skipping range coreg for swath IW{0}'.format(swath))
# continue
#minBurst, maxBurst = self._insar.commonReferenceBurstLimits(swath-1)
#maxBurst = maxBurst - 1 ###For overlaps
#referenceTop = self._insar.loadProduct( os.path.join(self._insar.referenceSlcOverlapProduct, 'top_IW{0}.xml'.format(swath)))
#referenceBottom = self._insar.loadProduct( os.path.join(self._insar.referenceSlcOverlapProduct , 'bottom_IW{0}.xml'.format(swath)))
referenceTop = ut.loadProduct(os.path.join(inps.reference , 'overlap','IW{0}_top.xml'.format(swath)))
referenceBottom = ut.loadProduct(os.path.join(inps.reference ,'overlap', 'IW{0}_bottom.xml'.format(swath)))
secondaryTop = ut.loadProduct(os.path.join(inps.secondary, 'overlap', 'IW{0}_top.xml'.format(swath)))
secondaryBottom = ut.loadProduct(os.path.join(inps.secondary, 'overlap', 'IW{0}_bottom.xml'.format(swath)))
#secondaryTop = self._insar.loadProduct( os.path.join(self._insar.coregOverlapProduct , 'top_IW{0}.xml'.format(swath)))
#secondaryBottom = self._insar.loadProduct( os.path.join(self._insar.coregOverlapProduct, 'bottom_IW{0}.xml'.format(swath)))
minReference = referenceTop.bursts[0].burstNumber
maxReference = referenceTop.bursts[-1].burstNumber
minSecondary = secondaryTop.bursts[0].burstNumber
maxSecondary = secondaryTop.bursts[-1].burstNumber
minBurst = max(minSecondary, minReference)
maxBurst = min(maxSecondary, maxReference)
#maxBurst = maxBurst - 1 ###For overlaps
maxBurst = maxBurst + 1
for pair in [(referenceTop,secondaryTop), (referenceBottom,secondaryBottom)]:
for ii in range(minBurst,maxBurst):
mFile = pair[0].bursts[ii-minReference].image.filename
sFile = pair[1].bursts[ii-minSecondary].image.filename
field = runAmpcor(mFile, sFile)
for offset in field:
rangeOffsets.append(offset.dx)
snr.append(offset.snr)
###Cull
mask = np.logical_and(np.array(snr) > inps.offsetSNRThreshold, np.abs(rangeOffsets) < 1.2)
val = np.array(rangeOffsets)[mask]
medianval = np.median(val)
meanval = np.mean(val)
stdval = np.std(val)
# convert the estimations to meters
medianval = medianval * referenceTop.bursts[0].rangePixelSize
meanval = meanval * referenceTop.bursts[0].rangePixelSize
stdval = stdval * referenceTop.bursts[0].rangePixelSize
hist, bins = np.histogram(val, 50, density=True)
center = 0.5*(bins[:-1] + bins[1:])
outputDir = os.path.dirname(inps.output)
os.makedirs(outputDir, exist_ok=True)
try:
import matplotlib as mpl
mpl.use('Agg')
import matplotlib.pyplot as plt
except:
print('Matplotlib could not be imported. Skipping debug plot ...')
debugPlot = False
debugPlot = False
if debugPlot:
try:
####Plotting
plt.figure()
plt.bar(center, hist, align='center', width = 0.7*(bins[1] - bins[0]))
plt.xlabel('Range shift in pixels')
plt.savefig( os.path.join(outputDir, 'rangeMisregistration.jpg'))
plt.show()
plt.close()
except:
print('Looks like matplotlib could not save image to JPEG, continuing .....')
print('Install Pillow to ensure debug plots for Residual range offsets are generated.')
pass
with open(inps.output, 'w') as f:
f.write('median : '+str(medianval) +'\n')
f.write('mean : '+str(meanval)+'\n')
f.write('std : '+str(stdval)+'\n')
f.write('snr threshold : '+str(inps.offsetSNRThreshold)+'\n')
f.write('mumber of coherent points : '+str(len(val))+'\n')
if __name__ == '__main__':
'''
Main driver.
'''
main()