lsst.meas.algorithms.pcaPsfDeterminer Namespace Reference

Classes
class	PcaPsfDeterminerConfig
class	PcaPsfDeterminerTask
	A measurePsfTask psf estimator. More...

Functions
def	numCandidatesToReject (numBadCandidates, numIter, totalIter)
def	candidatesIter (psfCellSet, ignoreBad=True)
	Generator for Psf candidates. More...

Function Documentation

candidatesIter()

def lsst.meas.algorithms.pcaPsfDeterminer.candidatesIter	(		psfCellSet,
			ignoreBad = True
	)

Generator for Psf candidates.

This allows two 'for' loops to be reduced to one.

Parameters

psfCellSet	SpatialCellSet of PSF candidates
ignoreBad	Ignore candidates flagged as BAD?

Returns

SpatialCell, PsfCandidate

Definition at line 636 of file pcaPsfDeterminer.py.

numCandidatesToReject()

def lsst.meas.algorithms.pcaPsfDeterminer.numCandidatesToReject	(		numBadCandidates,
			numIter,
			totalIter
	)

Return the number of PSF candidates to be rejected.

The number of candidates being rejected on each iteration gradually
increases, so that on the Nth of M iterations we reject N/M of the bad
candidates.

Parameters
----------
numBadCandidates : int
    Number of bad candidates under consideration.

numIter : int
    The number of the current PSF iteration.

totalIter : int
    The total number of PSF iterations.

Returns
-------
int
    Number of candidates to reject.

Definition at line 46 of file pcaPsfDeterminer.py.