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Definition of "pyramid coding" |
any compression scheme that repeatedly divides an image into two subbands, one, a lowpass representation that is subsampled and used as input for the next level, and the other an error (difference) image. A small lowpass image plus a pyramid of difference images of increasing size is generated, allowing the lowpass information to be coded accurately with few codewords, and the highpass information to be coded with coarse quantization. |
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