从日常使用的角度考虑，第一档防窥强度基本上就完全足够了，几乎不影响屏幕显示素质。
Author(s): Stepan Savka, Andriy Serednytski, Dmytro Popovych，详情可参考夫子
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Another way to approach dithering is to analyse the input image in order to make informed decisions about how best to perturb pixel values prior to quantisation. Error-diffusion dithering does this by sequentially taking the quantisation error for the current pixel (the difference between the input value and the quantised value) and distributing it to surrounding pixels in variable proportions according to a diffusion kernel . The result is that input pixel values are perturbed just enough to compensate for the error introduced by previous pixels.，详情可参考Line官方版本下载