Because the human eye doesn't see red, green and blue light equally we need a reliable way of representing the brightness of a pixel independent of colour. And so steps up the luminance histogram - the most accurate way of spotting clipped shadows and blown highlights threatening the very existence of your image!
Photoshop Video Tutorial - Luminance Histogram
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6 Jul 2008 - 21:12
brightness, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, levels command, luminance, luminance histogram, midtones, Photographic, photoshop cs3, shadows, video tutorial
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