lsst.meas.algorithms.detection Namespace Reference

Classes
class	PsfGenerationError
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 1081 of file detection.py.

def 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.
    """
    exposure0 = exposureList[0]
    image0 = exposure0.getMaskedImage()
 
    addedImage = image0.Factory(image0, True)
    addedImage.setXY0(image0.getXY0())
 
    for exposure in exposureList[1:]:
        image = exposure.getMaskedImage()
        addedImage += image
 
    addedExposure = exposure0.Factory(addedImage, exposure0.getWcs())
    return addedExposure