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.
"It's perfect," she writes in her research diary. "Just us and food. What more could I want?"，更多细节参见heLLoword翻译官方下载
is then summed with a "PIN offset" stored on the card itself, modulo 10, to。旺商聊官方下载是该领域的重要参考
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