Task to be used as an ImageMapperSubtask for performing
A&L decorrelation on subimages on a grid across a A&L difference image.
This task subclasses DecorrelateALKernelTask in order to implement
all of that task's configuration parameters, as well as its `run` method.
Definition at line 351 of file imageDecorrelation.py.
def lsst.ip.diffim.imageDecorrelation.DecorrelateALKernelMapperSubtask.run |
( |
|
self, |
|
|
|
subExposure, |
|
|
|
expandedSubExposure, |
|
|
|
fullBBox, |
|
|
|
template, |
|
|
|
science, |
|
|
|
alTaskResult = None , |
|
|
|
psfMatchingKernel = None , |
|
|
|
preConvKernel = None , |
|
|
|
kwargs |
|
) |
| |
Perform decorrelation operation on `subExposure`, using
`expandedSubExposure` to allow for invalid edge pixels arising from
convolutions.
This method performs A&L decorrelation on `subExposure` using
local measures for image variances and PSF. `subExposure` is a
sub-exposure of the non-decorrelated A&L diffim. It also
requires the corresponding sub-exposures of the template
(`template`) and science (`science`) exposures.
Parameters
----------
subExposure : lsst.afw.image.Exposure
the sub-exposure of the diffim
expandedSubExposure : lsst.afw.image.Exposure
the expanded sub-exposure upon which to operate
fullBBox : afwGeom.BoundingBox
the bounding box of the original exposure
template : afw.Exposure
the corresponding sub-exposure of the template exposure
science : afw.Exposure
the corresponding sub-exposure of the science exposure
alTaskResult : pipeBase.Struct
the result of A&L image differencing on `science` and
`template`, importantly containing the resulting
`psfMatchingKernel`. Can be `None`, only if
`psfMatchingKernel` is not `None`.
psfMatchingKernel : Alternative parameter for passing the
A&L `psfMatchingKernel` directly.
preConvKernel : If not None, then pre-filtering was applied
to science exposure, and this is the pre-convolution
kernel.
kwargs :
additional keyword arguments propagated from
`ImageMapReduceTask.run`.
Returns
-------
A `pipeBase.Struct` containing:
* `subExposure` : the result of the `subExposure` processing.
* `decorrelationKernel` : the decorrelation kernel, currently
not used.
Notes
-----
This `run` method accepts parameters identical to those of
`ImageMapperSubtask.run`, since it is called from the
`ImageMapperTask`. See that class for more information.
Definition at line 366 of file imageDecorrelation.py.