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Photo: Official Artemis crew portrait. Josh Valcarcel/NASA Handout/EPA-EFE/REX/Shutterstock
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for each pixel in image。关于这个话题，搜狗输入法下载提供了深入分析
Comparison between Knoll’s and Yliluoma’s algorithms using a 16-colour irregular palette. Left to right: Knoll, Yliluoma. The ‘Yliluoma’s ordered dithering algorithm 2‘ variant was used.