Talk:Channel (digital image)
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I've heard things about a "delta channel" or "z-depth channel", which represents the distance between the pixel's source and the viewer/camera. It effectively shows where the pixels are located in 3D space.
- It can allow a compositor to remove the background from an image, akin to color keying, and overlay the trimmed image on another background.
- An image editor can use it to alter depth-of-field, blurring or sharpening/deconvoluting selected ranges.
—Nahum Reduta 02:10, 19 May 2007 (UTC)