Instructor Richard Harrington revisits Photoshop's calculations command, and shows you how to generate an alpha channel or selection matte based on the color values of an image.
Richard Harrington is author of Producing Video Podcasts, published by Focal Press.
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Richard's visual communications consultancy, RHED Pixel, creates motion graphics, and produces video and multimedia projects. Check out their resource blog at http://www.vidpodcaster.com.
very interesting, only have used calculations for mono, thanks
danielmurray04 2 years ago