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.
第一百零三条 公安机关对与违反治安管理行为有关的场所或者违反治安管理行为人的人身、物品可以进行检查。检查时，人民警察不得少于二人，并应当出示人民警察证。
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政绩之本，在于为民。政绩好不好，人民最有发言权。
garbage? Maybe we can allocate those on the stack?
。safew官方下载是该领域的重要参考
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第三个动作，也是最重要却最容易被忽略的：「擦拭镜头」。