Decimation
Decimation – Term used to describe the process by which an image file is reduced by throwing away sampled points. If an image array consisted of 100 samples on the X axis and 100 samples on the Y axis, and every other sample where thrown away, the image file is decimated by a factor of 2 and the size of the file is reduced by 1/4. If only one sample out of every four is saved, the decimation factor is 4 and the file size is 1/16 of the original. Decimation is a low cost way of compressing video files and is found in many low cost systems. Decimation however introduces many artifacts that are unacceptable in higher cost systems.
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