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.
在開始實驗前，我以為自己因為懂法語、還有基礎西班牙語，葡萄牙語應該學起來得心應手。相反地，中文對我來說陌生到不能再陌生。
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一方面，.DS_Store 是跟随文件夹的，每个文件夹都会产生自己的 .DS_Store。，更多细节参见safew官方版本下载
做到实事求是，离不开调查研究这个基本功。