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LSST Data Management Base Package
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lsst.meas.algorithms.detection Namespace Reference

Classes

class  SourceDetectionConfig
 
class  SourceDetectionTask
 

Functions

 addExposures (exposureList)
 

Function Documentation

◆ addExposures()

lsst.meas.algorithms.detection.addExposures ( exposureList)
Add a set of exposures together.

Parameters
----------
exposureList : `list` of `lsst.afw.image.Exposure`
    Sequence of exposures to add.

Returns
-------
addedExposure : `lsst.afw.image.Exposure`
    An exposure of the same size as each exposure in ``exposureList``,
    with the metadata from ``exposureList[0]`` and a masked image equal
    to the sum of all the exposure's masked images.

Definition at line 1048 of file detection.py.

1048def addExposures(exposureList):
1049 """Add a set of exposures together.
1050
1051 Parameters
1052 ----------
1053 exposureList : `list` of `lsst.afw.image.Exposure`
1054 Sequence of exposures to add.
1055
1056 Returns
1057 -------
1058 addedExposure : `lsst.afw.image.Exposure`
1059 An exposure of the same size as each exposure in ``exposureList``,
1060 with the metadata from ``exposureList[0]`` and a masked image equal
1061 to the sum of all the exposure's masked images.
1062 """
1063 exposure0 = exposureList[0]
1064 image0 = exposure0.getMaskedImage()
1065
1066 addedImage = image0.Factory(image0, True)
1067 addedImage.setXY0(image0.getXY0())
1068
1069 for exposure in exposureList[1:]:
1070 image = exposure.getMaskedImage()
1071 addedImage += image
1072
1073 addedExposure = exposure0.Factory(addedImage, exposure0.getWcs())
1074 return addedExposure