Contrast Enhancement

[gowribala]

Hai..

To clearly view the shapes and sudden intensity change ,I need to improve the contrast in my processing image.

For contrast enhancement i have used Histogram Equalization.But i didn't get expected output.

please guide me how to achieve contrast enhancement.

[snibgo]

Increasing contrast somewhere will always reduce it somewhere else.

Can you put up your image and explain what you want?

[fmw42]

In IM, you have two modes of operation for histogram equalization using -equalize

If you want to equalize all channels together then,

convert image -equalize result

If you want to equalize each channel separately then,

convert image -channel rgb -equalize result


But as snibgo said, it is always best to provide examples of what you want to do and a clear explanation of the problem along with identifying your version of IM and platform.

see viewtopic.php?f=1&t=9620