Фото: Сергей Бобылев / ТАСС
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.
，这一点在safew官方版本下载中也有详细论述
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// 逻辑：只要右侧元素<最大值，说明该元素需纳入无序区间，右边界右移
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