lsst.ip.diffim.imageMapReduce.ImageMapper Class Reference

Inheritance diagram for lsst.ip.diffim.imageMapReduce.ImageMapper:

Public Member Functions
def	run (self, subExposure, expandedSubExposure, fullBBox, **kwargs)

Static Public Attributes
	ConfigClass = ImageMapperConfig

Detailed Description

Abstract base class for any task that is to be
used as `ImageMapReduceConfig.mapper`.

Notes
-----
An `ImageMapper` is responsible for processing individual
sub-exposures in its `run` method, which is called from
`ImageMapReduceTask.run`. `run` may return a processed new
sub-exposure which can be be "stitched" back into a new resulting
larger exposure (depending on the configured
`ImageReducer`); otherwise if it does not return an
lsst.afw.image.Exposure, then the
`ImageReducer.config.reducer.reduceOperation`
should be set to 'none' and the result will be propagated
as-is.

Definition at line 89 of file imageMapReduce.py.

Member Function Documentation

run()

def lsst.ip.diffim.imageMapReduce.ImageMapper.run	(		self,
			subExposure,
			expandedSubExposure,
			fullBBox,
		**	kwargs
	)

Perform operation on `subExposure`.

To be implemented by subclasses. See class docstring for more
details. This method is given the `subExposure` which
is to be operated upon, and an `expandedSubExposure` which
will contain `subExposure` with additional surrounding
pixels. This allows for, for example, convolutions (which
should be performed on `expandedSubExposure`), to prevent the
returned sub-exposure from containing invalid pixels.

This method may return a new, processed sub-exposure which can
be be "stitched" back into a new resulting larger exposure
(depending on the paired, configured `ImageReducer`);
otherwise if it does not return an lsst.afw.image.Exposure, then the
`ImageReducer.config.mapper.reduceOperation`
should be set to 'none' and the result will be propagated
as-is.

Parameters
----------
subExposure : `lsst.afw.image.Exposure`
    the sub-exposure upon which to operate
expandedSubExposure : `lsst.afw.image.Exposure`
    the expanded sub-exposure upon which to operate
fullBBox : `lsst.geom.Box2I`
    the bounding box of the original exposure
kwargs :
    additional keyword arguments propagated from
    `ImageMapReduceTask.run`.

Returns
-------
result : `lsst.pipe.base.Struct`
    A structure containing the result of the `subExposure` processing,
    which may itself be of any type. See above for details. If it is an
    `lsst.afw.image.Exposure` (processed sub-exposure), then the name in
    the Struct should be 'subExposure'. This is implemented here as a
    pass-through example only.

Definition at line 110 of file imageMapReduce.py.

    def run(self, subExposure, expandedSubExposure, fullBBox, **kwargs):
        """Perform operation on `subExposure`.
 
        To be implemented by subclasses. See class docstring for more
        details. This method is given the `subExposure` which
        is to be operated upon, and an `expandedSubExposure` which
        will contain `subExposure` with additional surrounding
        pixels. This allows for, for example, convolutions (which
        should be performed on `expandedSubExposure`), to prevent the
        returned sub-exposure from containing invalid pixels.
 
        This method may return a new, processed sub-exposure which can
        be be "stitched" back into a new resulting larger exposure
        (depending on the paired, configured `ImageReducer`);
        otherwise if it does not return an lsst.afw.image.Exposure, then the
        `ImageReducer.config.mapper.reduceOperation`
        should be set to 'none' and the result will be propagated
        as-is.
 
        Parameters
        ----------
        subExposure : `lsst.afw.image.Exposure`
            the sub-exposure upon which to operate
        expandedSubExposure : `lsst.afw.image.Exposure`
            the expanded sub-exposure upon which to operate
        fullBBox : `lsst.geom.Box2I`
            the bounding box of the original exposure
        kwargs :
            additional keyword arguments propagated from
            `ImageMapReduceTask.run`.
 
        Returns
        -------
        result : `lsst.pipe.base.Struct`
            A structure containing the result of the `subExposure` processing,
            which may itself be of any type. See above for details. If it is an
            `lsst.afw.image.Exposure` (processed sub-exposure), then the name in
            the Struct should be 'subExposure'. This is implemented here as a
            pass-through example only.
        """
        return pipeBase.Struct(subExposure=subExposure)
 
 

Member Data Documentation

ConfigClass

lsst.ip.diffim.imageMapReduce.ImageMapper.ConfigClass = ImageMapperConfig

static

Definition at line 106 of file imageMapReduce.py.

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The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-0.7.0/Linux64/ip_diffim/22.0.1-24-g1ad7a390+a9625a72a8/python/lsst/ip/diffim/imageMapReduce.py