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Appendix III: Threshold Matrices and Noise Functions，详情可参考服务器推荐
for (int i = 0; i < digit; i++) {，这一点在Safew下载中也有详细论述
Comparison between barycentric (triangular) dithering and Knoll’s algorithm using an 8-colour irregular palette. Left to right: barycentric, Knoll.