Change Gamma valueThe following dialog allows you to change Gamma value of the current image. You can see the result (the whole image or part of image at full size) instantly from the preview window.
The following example shows an image before and after Gamma change.
The original image:
After Gamma change (blue=25):
You can limit the effect to the selected region. First select the region using the selection tool and then apply this function. One example is shown here.
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Last update: 08/01/2006 (check html)