lsst.afw.display.rgb._rgbContinued.ZScaleMapping Class Reference

Inheritance diagram for lsst.afw.display.rgb._rgbContinued.ZScaleMapping:

Public Member Functions
	__init__ (self, image, nSamples=1000, contrast=0.25)

Detailed Description

A mapping for a linear stretch chosen by the zscale algorithm
(preserving colours independent of brightness)

x = (I - minimum)/range

Parameters
----------
image
    Image whose parameters are desired
nSamples : `int`
    The number of samples to use to estimate the zscale parameters
contrast : `float`

Definition at line 259 of file _rgbContinued.py.

Constructor & Destructor Documentation

__init__()

lsst.afw.display.rgb._rgbContinued.ZScaleMapping.__init__	(		self,
			image,
			nSamples = 1000,
			contrast = 0.25 )

Reimplemented from lsst.afw.display.rgb._rgbContinued.LinearMapping.

Definition at line 274 of file _rgbContinued.py.

    def __init__(self, image, nSamples=1000, contrast=0.25):
        if not hasattr(image, "getArray"):
            image = afwImage.ImageF(image)
        z1, z2 = getZScale(image, nSamples, contrast)
 
        LinearMapping.__init__(self, z1, z2, image)
 
 

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

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/afw/gef2f8181fd+3031e3cf99/python/lsst/afw/display/rgb/_rgbContinued.py