S, algorithm> One of the progreSSive coding methodS uSed in PNGimageS. Adam7, named after itS author, Adam M. CoStello, conSiStS of Seven diStinct paSSeS over the image. Each paSS tranSmitS a SubSet of the pixelS in the image. The paSS 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)