lsst.ip.diffim  13.0-26-g703d095+5
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lsst.ip.diffim.utils.DipoleTestImage Class Reference

Utility class for dipole measurement testing. More...

Inheritance diagram for lsst.ip.diffim.utils.DipoleTestImage:

Public Member Functions

def __init__
 
def fitDipoleSource
 
def detectDipoleSources
 Utility function for detecting dipoles. More...
 

Public Attributes

 w
 
 h
 
 xcenPos
 
 ycenPos
 
 xcenNeg
 
 ycenNeg
 
 psfSigma
 
 flux
 
 fluxNeg
 
 noise
 
 gradientParams
 

Private Member Functions

def _makeDipoleImage
 Generate an exposure and catalog with the given dipole source(s) More...
 
def _makeStarImage
 Generate an exposure and catalog with the given stellar source(s) More...
 

Detailed Description

Utility class for dipole measurement testing.

Generate an image with simulated dipoles and noise; store the original "pre-subtraction" images and catalogs as well. Used to generate test data for DMTN-007 (http://dmtn-007.lsst.io).

Definition at line 742 of file utils.py.

Constructor & Destructor Documentation

def lsst.ip.diffim.utils.DipoleTestImage.__init__ (   self,
  w = 101,
  h = 101,
  xcenPos = [27.],
  ycenPos = [25.],
  xcenNeg = [23.],
  ycenNeg = [25.],
  psfSigma = 2.,
  flux = [30000.],
  fluxNeg = None,
  noise = 10.,
  gradientParams = None 
)

Definition at line 752 of file utils.py.

Member Function Documentation

def lsst.ip.diffim.utils.DipoleTestImage._makeDipoleImage (   self)
private

Generate an exposure and catalog with the given dipole source(s)

Definition at line 768 of file utils.py.

def lsst.ip.diffim.utils.DipoleTestImage._makeStarImage (   self,
  xc = [15.3],
  yc = [18.6],
  flux = [2500],
  schema = None,
  randomSeed = None 
)
private

Generate an exposure and catalog with the given stellar source(s)

Definition at line 794 of file utils.py.

def lsst.ip.diffim.utils.DipoleTestImage.detectDipoleSources (   self,
  doMerge = True,
  diffim = None,
  detectSigma = 5.5,
  grow = 3,
  minBinSize = 32 
)

Utility function for detecting dipoles.

Detect pos/neg sources in the diffim, then merge them. A bigger "grow" parameter leads to a larger footprint which helps with dipole measurement for faint dipoles.

Parameters

doMerge : bool Whether to merge the positive and negagive detections into a single source table diffim : lsst.afw.image.exposure.exposure.ExposureF Difference image on which to perform detection detectSigma : float Threshold for object detection grow : int Number of pixels to grow the footprints before merging minBinSize : int Minimum bin size for the background (re)estimation (only applies if the default leads to min(nBinX, nBinY) < fit order so the default config parameter needs to be decreased, but not to a value smaller than minBinSize, in which case the fitting algorithm will take over and decrease the fit order appropriately.)

Returns

sources : lsst.afw.table.SourceCatalog If doMerge=True, the merged source catalog is returned OR detectTask : lsst.meas.algorithms.SourceDetectionTask schema : lsst.afw.table.Schema If doMerge=False, the source detection task and its schema are returned

Definition at line 824 of file utils.py.

def lsst.ip.diffim.utils.DipoleTestImage.fitDipoleSource (   self,
  source,
  kwds 
)

Definition at line 819 of file utils.py.

Member Data Documentation

lsst.ip.diffim.utils.DipoleTestImage.flux

Definition at line 760 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.fluxNeg

Definition at line 761 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.gradientParams

Definition at line 765 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.h

Definition at line 754 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.noise

Definition at line 764 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.psfSigma

Definition at line 759 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.w

Definition at line 753 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.xcenNeg

Definition at line 757 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.xcenPos

Definition at line 755 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.ycenNeg

Definition at line 758 of file utils.py.

lsst.ip.diffim.utils.DipoleTestImage.ycenPos

Definition at line 756 of file utils.py.


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