Adam7


adam7

graphics, algorithm
one of the progressive coding methods used in png images. adam7, named after its author, adam m. costello, consists of seven distinct p-sses over the image. each p-ss transmits a subset of the pixels in the image. the p-ss in which each pixel is transmitted is defined by replicating the following 8-by-8 pattern over the entire image, starting at the top left:
1 6 4 6 2 6 4 6 7 7 7 7 7 7 7 7 5 6 5 6 5 6 5 6 7 7 7 7 7 7 7 7 3 6 4 6 3 6 4 6 7 7 7 7 7 7 7 7 5 6 5 6 5 6 5 6 7 7 7 7 7 7 7 7
(2000-09-12)

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