Native CLAHE support

[fmw42]

Here is the result using IM 7.0.8.16 beta

Input:


CLAHE:

Code: Select all

magick 49228938-c2277f80-f3ec-11e8-8476-2c352741e49f.jpg -clahe 16x16+256+2.5 49228938-c2277f80-f3ec-11e8-8476-2c352741e49f_clahe_16x16+256+2p5.jpg

For comparison, here are two results from my adaptivegamma script:


Adaptivegamma:

Code: Select all

adaptivegamma -m 0 -b 1.5 -s 5 adaptivegamma/49228938-c2277f80-f3ec-11e8-8476-2c352741e49f.jpg 49228938-c2277f80-f3ec-11e8-8476-2c352741e49f_adaptivegamma_m0_b1p5.jpg

Code: Select all

adaptivegamma -m 0 -b 1.5 -s 50 adaptivegamma/49228938-c2277f80-f3ec-11e8-8476-2c352741e49f.jpg 49228938-c2277f80-f3ec-11e8-8476-2c352741e49f_adaptivegamma_m0_b1p5_s50.jpg

The adaptive gamma does not seem to have quite the contrast as the CLAHE.

[fmw42]

It seems to be working fine for me now using tile size in width and height in pixels and also in percent in IM 7.0.8.17 beta.