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About: LRGB     Goto   Sponge   NotDistinct   Permalink

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LRGB, short for Luminance, Red, Green and Blue, is a photographic technique used in amateur astronomy for producing good quality color photographs by combining a high-quality black-and-white image with a lower-quality color image. In amateur astronomy, it is easier and cheaper to obtain good quality, high signal-to-noise ratio images in black and white. The LRGB method is used to work around this to get good color images. The color information from the color image is combined with the overall brightness from the black-and-white image.