D 2014-02-02T19:13:44.479
L Dithering
P 49b36209f35692b64cc135e08f59de85f96a263c
U user
W 955
<h1>Dithering</h1>

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.
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Original image:<br/>
<img src="/doc/tip/stalin.jpg"/>
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See results for ...<br/><br/>

Output image for <b>general Sierra</b>:<br/>
<img src="/doc/tip/out/dithgen_sierra.jpg"/>
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Output image for <b>general Sierra Two Rows</b>:<br/>
<img src="/doc/tip/out/dithgen_sierra2.jpg"/>
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Output image for <b>general Sierra Low</b>:<br/>
<img src="/doc/tip/out/dithgen_sierralow.jpg"/>
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Output image for <b>general Floyd-Steinberg</b>:<br/>
<img src="/doc/tip/out/dithgen_floyd.jpg"/>
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Output image for <b>general False Floyd-Steinberg</b>:<br/>
<img src="/doc/tip/out/dithgen_falsefloyd.jpg" width="100%"/>
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Z c5ae880e2702feb7cbeab9afbd2391d9