Inheritance diagram for lsst.meas.algorithms.installGaussianPsf.InstallGaussianPsfTask:

Public Member Functions
	run (self, exposure)

Static Public Attributes
	ConfigClass = InstallGaussianPsfConfig

Static Protected Attributes
str	_DefaultName = "installSimplePsfModel"

Detailed Description

Install a Gaussian PSF model in an exposure.

If the exposure already has a PSF model then the new model
has the same sigma and size (width and height in pixels) of the existing
model.

Definition at line 55 of file installGaussianPsf.py.

Member Function Documentation

◆ run()

lsst.meas.algorithms.installGaussianPsf.InstallGaussianPsfTask.run	(		self,
			exposure )

Set exposure's PSF to a simple PSF model

The sigma and width of the new simple PSF model matches the sigma and
width of the current model, if any, else the config parameters are used.

Parameters
----------
exposure : `lsst.afw.image.Exposure`
    Exposure in which to replace or add the PSF model.

Definition at line 65 of file installGaussianPsf.py.

    def run(self, exposure):
        """Set exposure's PSF to a simple PSF model
 
        The sigma and width of the new simple PSF model matches the sigma and
        width of the current model, if any, else the config parameters are used.
 
        Parameters
        ----------
        exposure : `lsst.afw.image.Exposure`
            Exposure in which to replace or add the PSF model.
        """
        if exposure.hasPsf():
            psfModel = exposure.getPsf()
            psfSigma = psfModel.computeShape(psfModel.getAveragePosition()).getDeterminantRadius()
            width, height = psfModel.computeImage(psfModel.getAveragePosition()).getDimensions()
        else:
            psfSigma = self.config.fwhm / FwhmPerSigma
            width = height = self.config.width
 
        if psfSigma <= 0:
            raise RuntimeError("psfSigma = %s <= 0" % (psfSigma,))
 
        self.log.debug("installing a simple Gaussian PSF model with width=%s, height=%s, FWHM=%0.3f",
                       width, height, psfSigma*FwhmPerSigma)
        psfModel = SingleGaussianPsf(width, height, psfSigma)
        exposure.setPsf(psfModel)

Member Data Documentation

◆ _DefaultName

str lsst.meas.algorithms.installGaussianPsf.InstallGaussianPsfTask._DefaultName = "installSimplePsfModel"

staticprotected

Definition at line 63 of file installGaussianPsf.py.

◆ ConfigClass

lsst.meas.algorithms.installGaussianPsf.InstallGaussianPsfTask.ConfigClass = InstallGaussianPsfConfig

static

Definition at line 62 of file installGaussianPsf.py.

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

/j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/meas_algorithms/ge6526c86ff+889fc9d533/python/lsst/meas/algorithms/installGaussianPsf.py

Public Member Functions