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interealtime/gist:b97ced10eb7c74c0a66f

Created August 18, 2014 14:54
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Local contrast filter
Raw
gistfile1.txt
Take original image A, blur it to get image B. Then:
(A-B) * effectStrength + B
gives you output with lots more apparent detail.
It boosts contrast against surrounding pixels. A blur kernel with 1 pixel radius is equivalent to standard pixel sharpening, bigger blurs give a better effect but produce haloes around objects. You need a smarter blur that preserves edges to remove them.
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