Incidentally, you can combine the outputs again by piping the Red, Green and Blue images from the CIFilter in my previous post to 3 Billboards, and setting the Blending Mode of each billboard to Add.
a|x http://machinesdontcare.wordpress.com ----- Original Message ---- From: Alex Drinkwater <[EMAIL PROTECTED]> To: [email protected] Sent: Thursday, 8 May, 2008 9:03:31 PM Subject: Re: Color Channel Splitting 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 _______________________________________________ Do not post admin requests to the list. They will be ignored. Quartzcomposer-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/quartzcomposer-dev/the_voder%40yahoo.co.uk This email sent to [EMAIL PROTECTED] ________________________________ Sent from Yahoo! Mail. A Smarter Email.. __________________________________________________________ Sent from Yahoo! Mail. A Smarter Email http://uk.docs.yahoo.com/nowyoucan.html
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