From the course: Digital Media Foundations

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Reducing the burden with color subsampling

Reducing the burden with color subsampling

From the course: Digital Media Foundations

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Reducing the burden with color subsampling

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[Instructor] As mentioned earlier, our eyes are not very good at accurately perceiving color. In fact, they're so poor at seeing color relative to our perception of luminance, that image technology manufacturers have learned they can discard much of the color information in an image, interpolate the remaining color information, and we won't notice. By the way, interpolate is just a long word for averaging out. Choosing not to record color information for particular pixels in an image is called color spacing or color sub sampling, and there are a few approaches to it. The principal is very simple and the results can be impressive. You can store less information making the file smaller so you don't need as much storage space or bandwidth to transmit the image, and the audience perceives good quality, color rendition. Color spacing is indicated using three numbers. The first number is kind of the beats in the bar for music. It tells you how the image has been divided up for the purposes…

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