def testZScale(self):
"""Test using a zscale stretch"""
rgbImage = rgb.ZScaleMapping(self.images[R]).makeRgbImage()
if display:
plt = rgb.displayRGB(rgbImage, False)
plt.title("zscale")
plt.show()
def __init__(self, image=None, nSamples=1000, contrast=0.25):
"""Initialise an object able to carry out a zscale mapping
@param image to be used to estimate the stretch
@param nSamples Number of data points to use (default: 1000)
@param contrast Control the range of pixels to display around the median (default: 0.25)
"""
Normalize.__init__(self)
## The object used to perform the desired mapping
self.mapping = afwRgb.ZScaleMapping(image, nSamples, contrast)