64 lines
2.9 KiB
Python
64 lines
2.9 KiB
Python
#!/usr/bin/env python3
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#
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# Test program to run ampcor with GPU
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# For two GeoTiff images
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#
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import argparse
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import numpy as np
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from PyCuAmpcor import PyCuAmpcor
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def main():
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'''
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main program
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'''
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objOffset = PyCuAmpcor() # create the processor
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objOffset.algorithm = 0 # cross-correlation method 0=freq 1=time
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objOffset.deviceID = 0 # GPU device id to be used
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objOffset.nStreams = 2 # cudaStreams; multiple streams to overlap data transfer with gpu calculations
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objOffset.referenceImageName = "reference.tif"
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objOffset.referenceImageHeight = 16480 # RasterYSize
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objOffset.referenceImageWidth = 17000 # RasterXSize
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objOffset.secondaryImageName = "secondary.tif"
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objOffset.secondaryImageHeight = 16480
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objOffset.secondaryImageWidth = 17000
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objOffset.windowSizeWidth = 64 # template window size
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objOffset.windowSizeHeight = 64
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objOffset.halfSearchRangeDown = 20 # search range
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objOffset.halfSearchRangeAcross = 20
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objOffset.derampMethod = 1 # deramping for complex signal, set to 1 for real images
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objOffset.skipSampleDown = 128 # strides between windows
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objOffset.skipSampleAcross = 64
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# gpu processes several windows in one batch/Chunk
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# total windows in Chunk = numberWindowDownInChunk*numberWindowAcrossInChunk
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# the max number of windows depending on gpu memory and type
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objOffset.numberWindowDownInChunk = 1
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objOffset.numberWindowAcrossInChunk = 10
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objOffset.corrSurfaceOverSamplingFactor = 8 # oversampling factor for correlation surface
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objOffset.corrSurfaceZoomInWindow = 16 # area in correlation surface to be oversampled
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objOffset.corrSufaceOverSamplingMethod = 1 # fft or sinc oversampler
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objOffset.useMmap = 1 # default using memory map as buffer, if having troubles, set to 0
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objOffset.mmapSize = 1 # mmap or buffer size used for transferring data from file to gpu, in GB
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objOffset.numberWindowDown = 40 # number of windows to be processed
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objOffset.numberWindowAcross = 100
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# if to process the whole image; some math needs to be done
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# margin = 0 # margins to be neglected
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#objOffset.numberWindowDown = (objOffset.secondaryImageHeight - 2*margin - 2*objOffset.halfSearchRangeDown - objOffset.windowSizeHeight) // objOffset.skipSampleDown
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#objOffset.numberWindowAcross = (objOffset.secondaryImageWidth - 2*margin - 2*objOffset.halfSearchRangeAcross - objOffset.windowSizeWidth) // objOffset.skipSampleAcross
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objOffset.setupParams()
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objOffset.referenceStartPixelDownStatic = objOffset.halfSearchRangeDown # starting pixel offset
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objOffset.referenceStartPixelAcrossStatic = objOffset.halfSearchRangeDown
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objOffset.setConstantGrossOffset(0, 0) # gross offset between reference and secondary images
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objOffset.checkPixelInImageRange() # check whether there is something wrong with
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objOffset.runAmpcor()
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if __name__ == '__main__':
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main() |