Please port OrderedPosterizeImage to IM7

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glennrp
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Please port OrderedPosterizeImage to IM7

Post by glennrp » 2016-08-23T18:02:11-07:00

The OrderedPosterizeImageChannel method has not been ported from IM6 to IM7, so IM7 falls back on the original bi-level OrderedDitherImage method.

Given a black-to-white gradient image, compare IM-7.0.2-9

Code: Select all

magick gradient.png -ordered-dither o8x8,6 od_o8x8_6_im7.png
which has only black or white pixels with IM-6.9.5-7

Code: Select all

convert gradient.png -ordered-dither o8x8,6 od_o8x8_6_im6.png
whch has six levels of gray pixels

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