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.
第九十九条 人民警察询问被侵害人或者其他证人，可以在现场进行，也可以到其所在单位、住处或者其提出的地点进行；必要时，也可以通知其到公安机关提供证言。
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