User`s guide

Image Enhancement
• Image signal = Separate color signals
5 Use the Color Space Conversion block to separate the luma information
from the color information. Set the block parameters as follows:
• Conversion =
sR'G'B' to L*a*b*
• Image signal = Separate color signals
Because the range o f the L* values is between 0 and 100, you must
normalize them to between 0 and 1 before you pass them to the Histogram
Equalization block, which expects floating point input in this range.
6 Use the Constant block to define a normalization factor. Set the Constant
value parameter to
100.
7 UsetheDivideblocktonormalizetheL*valuestobetween0and1.Accept
the default parameters.
8 Use the Histogram Equalization block to m odify the contrast in the image.
Accept the default parameters.
This block enhances the contrast of images by transforming the luma
values in the color image so that the histogram of the output image
approximately matches a specified histogram.
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