#79 RGBAdjust just like ColorYUV -AutoBlack/AutoWhite

[Marek Roth]

Sure, there is RGBAdjust, though that one is very limited.
I could imagine a funktion like this:
ColorRGB (clip, float "gain_r", float "off_r", float
"gamma_r", float "cont_r", float "gain_g", float
"off_g", float "gamma_g", float "cont_g", float
"gain_b", float "off_b", float "gamma_b", float
"cont_b", boolean "analyze", boolean "autowhite",
boolean "autoblack")
For example, this would be very handy on some pure
sources which just have a bit too much green in the
blacklevel but good colors elsewhere.

[Ian Brabham]

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Good point!

RGBAdjust() recently learned about offsets, and analyse, I
may teach it about gamma when time permits.

Any thoughts on how the autowhite/autoblack should work.
The implementation in ColorYUV() is a bit lame, but possible.

Possible ideas are 2 pass, look a few frames ahead, running
averages, peak decay (the last 2 have problems with random
access).

IanB

[Ian Brabham]

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The 2.5.6 May 6 release has been taught about per channel
gamma.

I had another look at the autogain/autowhite from ColorYUV
and it is very lame. I will deassign myself from this item until
a plausible algorithm for autoblack/autowhite is proposed.

IanB