lsst.meas.algorithms.installGaussianPsf.InstallGaussianPsfTask Class Reference

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

Public Member Functions
def	run (self, exposure)

Static Public Attributes
	ConfigClass = InstallGaussianPsfConfig

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()

def 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 64 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().getDeterminantRadius()
            width, height = psfModel.computeImage().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

ConfigClass

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

static

Definition at line 61 of file installGaussianPsf.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/meas_algorithms/22.0.1-32-gf62ce7b1+aa4237961e/python/lsst/meas/algorithms/installGaussianPsf.py