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Local graylevel transforms

Short tutorial

Local graylevel transforms are applying the transforms explained in the gray-level mapping and histogram specification applets on overlapping, local, square windows around every pixel. The goal is to allow contrast enhancements giving more equal contrast in every part of the image. The method is computationally intensive as this applet surely will show you.

Related links:
Local histogram equalization at
See also the links under the gray-level mapping and histogram specification applets.

Applet instructions

Click the images on the upper right to change the image being processed. The up most slider let you change the local window size. The other sliders change the parameters in the equation above the sliders. This is the equation used when clicking the "Linear eq." button.


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