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# 

# LSST Data Management System 

# Copyright 2008, 2009, 2010 LSST Corporation. 

# 

# This product includes software developed by the 

# LSST Project (http://www.lsst.org/). 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the LSST License Statement and 

# the GNU General Public License along with this program. If not, 

# see <http://www.lsstcorp.org/LegalNotices/>. 

# 

 

"""Test lsst.coadd.utils.copyGoodPixels 

""" 

import unittest 

 

from builtins import range 

import numpy as np 

 

import lsst.utils.tests 

import lsst.afw.geom as afwGeom 

import lsst.afw.image as afwImage 

import lsst.coadd.utils as coaddUtils 

from lsst.log import Log 

 

try: 

display 

except NameError: 

display = False 

 

Log.getLogger("coadd.utils").setLevel(Log.INFO) 

 

 

def referenceCopyGoodPixelsImage(destImage, srcImage): 

"""Reference implementation of lsst.coadd.utils.copyGoodPixels for Images 

 

Unlike lsst.coadd.utils.copyGoodPixels this one does not update the input destImage, 

but instead returns the new version 

 

Inputs: 

- destImage: source image before adding srcImage (a MaskedImage) 

- srcImage: masked image to add to destImage (a MaskedImage) 

- badPixelMask: mask of bad pixels to ignore (an int) 

 

Returns: 

- destImage: new destImage 

- numGoodPix: number of good pixels 

""" 

destImage = destImage.Factory(destImage, True) # make deep copy 

 

overlapBBox = destImage.getBBox() 

overlapBBox.clip(srcImage.getBBox()) 

 

64 ↛ 65line 64 didn't jump to line 65, because the condition on line 64 was never true if overlapBBox.isEmpty(): 

return (destImage, 0) 

 

destImageView = destImage.Factory(destImage, overlapBBox, afwImage.PARENT, False) 

destImageArray = destImageView.getArray() 

 

srcImageView = srcImage.Factory(srcImage, overlapBBox, afwImage.PARENT, False) 

srcImageArray = srcImageView.getArray() 

 

isBadArray = np.isnan(srcImageArray) 

 

destImageArray[:] = np.where(isBadArray, destImageArray, srcImageArray) 

numGoodPix = np.sum(np.logical_not(isBadArray)) 

return destImage, numGoodPix 

 

 

def referenceCopyGoodPixelsMaskedImage(destImage, srcImage, badPixelMask): 

"""Reference implementation of lsst.coadd.utils.copyGoodPixels for MaskedImages 

 

Unlike lsst.coadd.utils.copyGoodPixels this one does not update the input destImage, 

but instead returns an updated copy 

 

@param[in] destImage: source image before adding srcImage (a MaskedImage) 

@param[in] srcImage: masked image to add to destImage (a MaskedImage) 

@param[in] badPixelMask: mask of bad pixels to ignore (an int) 

 

Returns: 

- destImage: new destImage 

- numGoodPix: number of good pixels 

""" 

destImage = destImage.Factory(destImage, True) # make deep copy 

 

overlapBBox = destImage.getBBox() 

overlapBBox.clip(srcImage.getBBox()) 

 

99 ↛ 100line 99 didn't jump to line 100, because the condition on line 99 was never true if overlapBBox.isEmpty(): 

return (destImage, 0) 

 

destImageView = destImage.Factory(destImage, overlapBBox, afwImage.PARENT, False) 

destImageArrayList = destImageView.getArrays() 

 

srcImageView = srcImage.Factory(srcImage, overlapBBox, afwImage.PARENT, False) 

srcImageArrayList = srcImageView.getArrays() 

 

isBadArray = (srcImageArrayList[1] & badPixelMask) != 0 

 

for ind in range(3): 

destImageView = destImageArrayList[ind] 

srcImageView = srcImageArrayList[ind] 

destImageView[:] = np.where(isBadArray, destImageView, srcImageView) 

numGoodPix = np.sum(np.logical_not(isBadArray)) 

return destImage, numGoodPix 

 

 

MaxMask = 0xFFFF 

 

 

class CopyGoodPixelsTestCase(lsst.utils.tests.TestCase): 

"""A test case for copyGoodPixels 

""" 

 

def getSolidMaskedImage(self, bbox, val, badMask=0): 

afwDim = bbox.getDimensions() 

npShape = (afwDim[1], afwDim[0]) 

 

np.random.seed(0) 

maskedImage = afwImage.MaskedImageF(bbox) 

imageArrays = maskedImage.getArrays() 

imageArrays[0][:] = val 

imageArrays[2][:] = val * 0.5 

imageArrays[1][:, 0:npShape[1]/2] = 0 

imageArrays[1][:, npShape[1]/2:] = badMask 

return maskedImage 

 

def getRandomMaskedImage(self, bbox, excludeMask=0): 

"""Get a randomly generated masked image 

""" 

141 ↛ 142line 141 didn't jump to line 142, because the condition on line 141 was never true if excludeMask > MaxMask: 

raise RuntimeError("excludeMask = %s > %s = MaxMask" % (excludeMask, MaxMask)) 

 

afwDim = bbox.getDimensions() 

npShape = (afwDim[1], afwDim[0]) 

 

np.random.seed(0) 

maskedImage = afwImage.MaskedImageF(bbox) 

imageArrays = maskedImage.getArrays() 

imageArrays[0][:] = np.random.normal(5000, 5000, npShape) # image 

imageArrays[2][:] = np.random.normal(3000, 3000, npShape) # variance 

imageArrays[1][:] = np.logical_and(np.random.randint(0, 8, npShape), ~excludeMask) 

return maskedImage 

 

def getRandomImage(self, bbox, nanSigma=0): 

"""Get a randomly generated image 

""" 

afwDim = bbox.getDimensions() 

npShape = (afwDim[1], afwDim[0]) 

 

np.random.seed(0) 

image = afwImage.ImageF(bbox) 

imageArray = image.getArray() 

imageArray[:] = np.random.normal(5000, 5000, npShape) 

if nanSigma > 0: 

# add NaNs at nanSigma above mean of a test array 

nanTest = np.random.normal(0, 1, npShape) 

imageArray[:] = np.where(nanTest > nanSigma, np.nan, imageArray) 

return image 

 

def basicMaskedImageTest(self, srcImage, destImage, badMask): 

refDestImage, refNumGoodPix = referenceCopyGoodPixelsMaskedImage(destImage, srcImage, badMask) 

numGoodPix = coaddUtils.copyGoodPixels(destImage, srcImage, badMask) 

 

self.assertEqual(numGoodPix, refNumGoodPix) 

 

msg = "masked image != reference masked image" 

try: 

self.assertMaskedImagesAlmostEqual(destImage, refDestImage, msg=msg) 

except Exception: 

destImage.writeFits("destMaskedImage.fits") 

refDestImage.writeFits("refDestMaskedImage.fits") 

raise 

 

def basicImageTest(self, srcImage, destImage): 

refDestImage, refNumGoodPix = referenceCopyGoodPixelsImage(destImage, srcImage) 

numGoodPix = coaddUtils.copyGoodPixels(destImage, srcImage) 

 

msg = "image != reference image" 

try: 

self.assertImagesAlmostEqual(destImage, refDestImage, msg=msg) 

except Exception: 

destImage.writeFits("destImage.fits") 

refDestImage.writeFits("refDestImage.fits") 

raise 

 

self.assertEqual(numGoodPix, refNumGoodPix) 

 

def testMaskedImage(self): 

"""Test image version of copyGoodPixels""" 

srcBBox = afwGeom.Box2I(afwGeom.Point2I(2, 17), afwGeom.Point2I(100, 101)) 

destBBox = afwGeom.Box2I(afwGeom.Point2I(13, 4), afwGeom.Point2I(95, 130)) 

destXY0 = destBBox.getMin() 

 

srcImage = self.getRandomMaskedImage(srcBBox) 

for badMask in (0, 3, MaxMask): 

destImage = self.getRandomMaskedImage(destBBox, excludeMask=badMask) 

destBBox = destImage.getBBox() 

self.basicMaskedImageTest(srcImage, destImage, badMask) 

 

for bboxStart in (destXY0, (50, 51)): 

for bboxDim in ((25, 36), (200, 200)): 

destViewBox = afwGeom.Box2I(afwGeom.Point2I(*bboxStart), afwGeom.Extent2I(*bboxDim)) 

destViewBox.clip(destBBox) 

destView = destImage.Factory(destImage, destViewBox, afwImage.PARENT, False) 

self.basicMaskedImageTest(srcImage, destView, badMask) 

 

def testImage(self): 

"""Test image version of copyGoodPixels""" 

srcBBox = afwGeom.Box2I(afwGeom.Point2I(2, 17), afwGeom.Point2I(100, 101)) 

destBBox = afwGeom.Box2I(afwGeom.Point2I(13, 4), afwGeom.Point2I(95, 130)) 

destXY0 = destBBox.getMin() 

 

srcImage = self.getRandomImage(srcBBox) 

for nanSigma in (0, 0.7, 2.0): 

destImage = self.getRandomImage(destBBox, nanSigma=nanSigma) 

destBBox = destImage.getBBox() 

self.basicImageTest(srcImage, destImage) 

 

for bboxStart in (destXY0, (50, 51)): 

for bboxDim in ((25, 36), (200, 200)): 

destViewBox = afwGeom.Box2I(afwGeom.Point2I(*bboxStart), afwGeom.Extent2I(*bboxDim)) 

destViewBox.clip(destBBox) 

destView = destImage.Factory(destImage, destViewBox, afwImage.PARENT, False) 

self.basicImageTest(srcImage, destView) 

 

 

class MemoryTester(lsst.utils.tests.MemoryTestCase): 

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

246 ↛ 247line 246 didn't jump to line 247, because the condition on line 246 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()