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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/>. 

# 

 

import unittest 

 

import lsst.utils.tests 

import lsst.afw.image as afwImage 

import lsst.afw.geom as afwGeom 

import lsst.ip.isr as ipIsr 

 

 

class IsrTestCases(unittest.TestCase): 

 

def setUp(self): 

self.pmin = afwGeom.Point2I(1, 1) 

self.pmax = afwGeom.Point2I(10, 10) 

self.flatScaleKeyword = "IMMODE" 

self.filenameKeyword = "filename" 

 

def tearDown(self): 

del self.pmin 

del self.pmax 

del self.flatScaleKeyword 

del self.filenameKeyword 

 

def doFlat(self, scaling): 

maskedImage = afwImage.MaskedImageF(afwGeom.Box2I(self.pmin, self.pmax)) 

maskedImage.getImage().set(10) 

 

flat = afwImage.MaskedImageF(afwGeom.Box2I(self.pmin, self.pmax)) 

flat.getImage().set(1) 

flatexposure = afwImage.ExposureF(flat, None) 

dmetadata = flatexposure.getMetadata() 

dmetadata.setString(self.filenameKeyword, 'Unittest Flat') 

 

ipIsr.flatCorrection(maskedImage, flatexposure.getMaskedImage(), 'USER', scaling) 

 

height = maskedImage.getHeight() 

width = maskedImage.getWidth() 

for j in range(height): 

for i in range(width): 

self.assertAlmostEqual(maskedImage.getImage().get(i, j), 10 / (1./scaling), 5) 

 

def testFlat1(self): 

self.doFlat(scaling=10) 

 

def testFlat2(self): 

self.doFlat(scaling=0.1) 

 

def testFlat3(self): 

self.doFlat(scaling=3.7) 

 

def doIllum(self, scaling): 

maskedImage = afwImage.MaskedImageF(afwGeom.Box2I(self.pmin, self.pmax)) 

maskedImage.getImage().set(10) 

 

illum = afwImage.MaskedImageF(afwGeom.Box2I(self.pmin, self.pmax)) 

illum.getImage().set(1) 

illumexposure = afwImage.ExposureF(illum, None) 

dmetadata = illumexposure.getMetadata() 

dmetadata.setString(self.filenameKeyword, 'Unittest Illum') 

 

ipIsr.illuminationCorrection(maskedImage, illumexposure.getMaskedImage(), scaling) 

 

height = maskedImage.getHeight() 

width = maskedImage.getWidth() 

for j in range(height): 

for i in range(width): 

self.assertAlmostEqual(maskedImage.getImage().get(i, j), 10 / (1./scaling), 5) 

 

def testIllum1(self): 

self.doIllum(scaling=10) 

 

def testIllum2(self): 

self.doIllum(scaling=0.1) 

 

def testIllum3(self): 

self.doIllum(scaling=3.7) 

 

def testGainAndReadnoise(self): 

import lsst.afw.image as afwImage 

from lsst.afw.cameraGeom.testUtils import DetectorWrapper 

from lsst.ip.isr import IsrTask 

 

isrTask = IsrTask() 

 

detector = DetectorWrapper().detector 

raw = afwImage.ExposureF(detector.getBBox()) 

 

level = 10 

readNoise = 1 

raw.image.set(level) 

 

amp = detector[0] 

amp.setReadNoise(readNoise) 

 

for gain in [-1, 0, 0.1, 1]: 

amp.setGain(gain) 

isrTask.updateVariance(raw, amp) 

if gain <= 0: 

gain = 1 

 

self.assertEqual(raw.variance.get(0, 0), level/gain + readNoise**2) 

 

 

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

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

133 ↛ 134line 133 didn't jump to line 134, because the condition on line 133 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()