Update of "Dithering"

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Artifact ID: 36ea12dd1ea5e26eb7b60436f6486362aa90de7c
Page Name:Dithering
Date: 2014-02-02 19:09:56
Original User: user
Parent: 9eddeb805e2f890282b3e5761e6242868a40b910


Dithering is the algorithm for preparing of image to black-white printing (old newspapers, old books) or for old displays systems. Here is 2 different implementations: general purpose with using of matrixes defined in imsh.scm library and special dithering algorithms.
Original image:

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Output image for general Sierra:

Output image for general Sierra Two Rows: