This code in a CIFilter will let you selectively enable/disable Red, Green and
Blue channels.
Use Boolean splitters attached to the Red Green and Blue inputs. The cables
will be orange, but it will still work fine.
/*
Enables/disables RGB channels
*/
kernel vec4 selectChannels(sampler Image, float Red, float Green, float Blue)
{
// Sample input pixels
vec4 pix = sample(Image, samplerCoord(Image));
// Enable or enable channels
pix.r = (Red == 1.0) ? pix.r : 0.0;
pix.g = (Green == 1.0) ? pix.g : 0.0;
pix.b = (Blue == 1.0) ? pix.b : 0.0;
// Output
return pix;
}
Hope this helps,
a|x
http://machinesdontcare.wordpress.com
----- Original Message ----
From: neb <[EMAIL PROTECTED]>
To: [email protected]
Sent: Thursday, 8 May, 2008 7:38:39 PM
Subject: Color Channel Splitting
A simple problem, I know the answer is right in front of me but can't
seem to find it...
How would I go about splitting a single image feed into RGBA or HSBA
component channels, so that I can process each channel individually as
images, and then reassemble (or not) later on in the chain? I'm using
QC3 on leopard.
Thanks!
- Neb
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