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Comparison between barycentric (triangular) dithering and Knoll’s algorithm using an 8-colour irregular palette. Left to right: barycentric, Knoll.
，这一点在safew官方下载中也有详细论述
Go to worldnews，详情可参考搜狗输入法下载
Show data like search volume, trends, keyword。safew官方版本下载是该领域的重要参考