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# 

# LSST Data Management System 

# 

# Copyright 2008-2016 AURA/LSST. 

# 

# 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 <https://www.lsstcorp.org/LegalNotices/>. 

# 

import unittest 

import numpy as np 

 

import lsst.geom 

import lsst.afw.table as afwTable 

import lsst.afw.image as afwImage 

from lsst.meas.algorithms import SourceDetectionTask 

from lsst.meas.algorithms.testUtils import plantSources 

import lsst.utils.tests 

 

display = False 

 

 

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

"""Test the aperture correction.""" 

 

def testBasics(self): 

bbox = lsst.geom.Box2I(lsst.geom.Point2I(256, 100), lsst.geom.Extent2I(128, 127)) 

minCounts = 5000 

maxCounts = 50000 

starSigma = 1.5 

numX = 5 

numY = 5 

coordList = self.makeCoordList( 

bbox=bbox, 

numX=numX, 

numY=numY, 

minCounts=minCounts, 

maxCounts=maxCounts, 

sigma=starSigma, 

) 

kwid = 11 

sky = 2000 

addPoissonNoise = True 

exposure = plantSources(bbox=bbox, kwid=kwid, sky=sky, coordList=coordList, 

addPoissonNoise=addPoissonNoise) 

 

schema = afwTable.SourceTable.makeMinimalSchema() 

config = SourceDetectionTask.ConfigClass() 

config.reEstimateBackground = False 

task = SourceDetectionTask(config=config, schema=schema) 

for doSmooth in (False, True): 

taskSigma = 2.2 

res = task.detectFootprints(exposure, doSmooth=doSmooth, sigma=taskSigma) 

self.assertEqual(res.numPos, numX * numY) 

self.assertEqual(res.numNeg, 0) 

self.assertEqual(task.metadata.get("sigma"), taskSigma) 

self.assertEqual(task.metadata.get("doSmooth"), doSmooth) 

self.assertEqual(task.metadata.get("nGrow"), int(taskSigma * config.nSigmaToGrow + 0.5)) 

 

res = task.detectFootprints(exposure, doSmooth=doSmooth, sigma=None) 

taskSigma = task.metadata.get("sigma") 

self.assertLess(abs(taskSigma - starSigma), 0.1) 

self.assertEqual(res.numPos, numX * numY) 

self.assertEqual(res.numNeg, 0) 

 

def makeCoordList(self, bbox, numX, numY, minCounts, maxCounts, sigma): 

"""Make a coordList for plantSources.""" 

""" 

Coords are uniformly spaced in a rectangular grid, with linearly increasing counts 

""" 

dX = bbox.getWidth() / float(numX) 

dY = bbox.getHeight() / float(numY) 

minX = bbox.getMinX() + (dX / 2.0) 

minY = bbox.getMinY() + (dY / 2.0) 

dCounts = (maxCounts - minCounts) / (numX * numY - 1) 

 

coordList = [] 

counts = minCounts 

for i in range(numX): 

x = minX + (dX * i) 

for j in range(numY): 

y = minY + (dY * j) 

coordList.append([x, y, counts, sigma]) 

counts += dCounts 

return coordList 

 

def testTempBackgrounds(self): 

"""Test that the temporary backgrounds we remove are properly restored""" 

bbox = lsst.geom.Box2I(lsst.geom.Point2I(12345, 67890), lsst.geom.Extent2I(128, 127)) 

original = afwImage.ExposureF(bbox) 

rng = np.random.RandomState(123) 

original.image.array[:] = rng.normal(size=original.image.array.shape) 

original.mask.set(0) 

original.variance.set(1.0) 

 

def checkExposure(original, doTempLocalBackground, doTempWideBackground): 

config = SourceDetectionTask.ConfigClass() 

config.reEstimateBackground = False 

config.thresholdType = "pixel_stdev" 

config.doTempLocalBackground = doTempLocalBackground 

config.doTempWideBackground = doTempWideBackground 

schema = afwTable.SourceTable.makeMinimalSchema() 

task = SourceDetectionTask(config=config, schema=schema) 

 

exposure = original.clone() 

task.detectFootprints(exposure, sigma=3.21) 

 

self.assertFloatsEqual(exposure.image.array, original.image.array) 

# Mask is permitted to vary: DETECTED bit gets set 

self.assertFloatsEqual(exposure.variance.array, original.variance.array) 

 

checkExposure(original, False, False) 

checkExposure(original, True, False) 

checkExposure(original, False, True) 

checkExposure(original, True, True) 

 

 

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

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

139 ↛ 140line 139 didn't jump to line 140, because the condition on line 139 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()