Why HE doesn't have flat histogram

Why do histogram equalisation programs usually not produce images with flat histograms?

Answers (1)

Image Analyst
Image Analyst on 19 Feb 2016
All it does is to redistribute the gray levels non-linearly. It's not flat because the image quantized into gray levels. If it were continuous, it would be flat. However, there are ways to get a flat histogram. See my attached demos.

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on 19 Feb 2016

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on 19 Feb 2016

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