[Digikam-devel] [Bug 141439] Whishlist: A velvia similar plugin. AKA vivid saturation

[Gerhard Kulzer]

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http://bugs.kde.org/show_bug.cgi?id=141439         




------- Additional Comments From gerhard kulzer net  2007-02-14 16:41 -------
Am Monday 12 February 2007 schrieb Gilles Caulier:
[bugs.kde.org quoted mail]
Hi Gilles, 
I tried it with the mixer [took me a while to get back into the scheme syntax, 
it should be called script-fou :-)] and it works well. 
What I could not verify it the spline function (the channel mixing is applied 
in a contrast enhanced manner: more inthe highlights, less in the shadows). I 
think I cannot reproduce it manually, that must be done under the hood. But 
even without spline the result looks quite promissing.

These are the values I tried (20% accentation):
# Channel Mixer Configuration File
CHANNEL: BLUE
PREVIEW: true
MONOCHROME: false
PRESERVE_LUMINOSITY: false
RED: 1.400 -0.200 -0.200
GREEN: -0.200 1.400 -0.200
BLUE: -0.200 -0.200 1.400
BLACK: 1.000 0.000 0.000

In gimp I needed only 6% to achieve the same effect. I believe the rest comes 
through the contrast amplification.

my 10¢