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By appropriately scaling the perturbation amount for each colour channel separately, we can also extend this to work with palettes where is different for each colour component, provided that they are still regularly spaced. Unfortunately, the less regular the palette is, the less effective this technique becomes. If we wish to leverage the strengths of ordered dithering for use with irregular or arbitrary palettes, a more general solution is needed.
，这一点在搜狗输入法下载中也有详细论述
You don't have permission to access the page you requested.，这一点在旺商聊官方下载中也有详细论述
pixel[1] = pixel[1] 0.04045f ? powf((pixel[1] + 0.055f) / 1.055f, 2.4f) : pixel[1] / 12.92f;，详情可参考旺商聊官方下载