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Science Forum Index » Image Processing Forum » A question about paint shop histogram equalization...
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 Posted: Mon May 19, 2008 10:58 am |
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Guest
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Hi to all,
what is the meaning of the gamma parameter, used in the program Paint
Shop, in the window of histogram equalization? How it is implemented? |
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| ImageAnalyst... |
| Posted: Tue May 20, 2008 1:34 am |
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Guest
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On May 19, 4:58 pm, king... at (no spam) freemail.it wrote:
Quote: Hi to all,
what is the meaning of the gamma parameter, used in the program Paint
Shop, in the window of histogram equalization? How it is implemented?
------------------------------------
Not exactly sure since I don't know their algorithm, but just from a
knowledge of gamma in general, I'd say that instead of giving a flat
histogram and a perfect ramp CDF (this would be the IDEAL case), it
would give a skewed histogram with the CDF being more of your
classical gamma shape rather than a perfect triangle ramp from 0-255.
It probably gives more bright gray levels than dark ones which has the
effect of brightening the dark regions without saturating the bright
regions (that's the general intent of using a gamma to give better
appearing photos).
Regards,
ImageAnalyst |
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