[MPlayer-dev-eng] [PATCH] vf_eq2 default parameter fix
Hampa Hug
hampa at hampa.ch
Tue Oct 28 17:42:05 CET 2003
Arpi wrote:
> (btw the vf_eq seems to handle negative contrast/brightness, while
> i'm not sure if vf_eq2 handles it correctly in LUT mode!!?)
Hmm, I never noticed that.
They both handle it correctly, but interpret the contrast parameter
differently. In vf_eq the parameter range is [-100..100]. Negative
values reduce contrast, positive values increase contrast.
In vf_eq2 the parameter range is [-inf..+inf]. Positve values less
than 1.0 reduce contrast, those greater than 1.0 increase
contrast. Negative values behave the same as their absolute
value, except that the image is also inverted.
Hampa
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