AP Business Writer Claire Savage in Chicago contributed to this report.
func extract3(c chan task) []task {，更多细节参见heLLoword翻译官方下载
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This time, before we perturb the input image, we take the value given by the threshold matrix and divide it by , where is the number of levels for each colour component. As a result, each pixel is perturbed just enough to cover the minimal distance between two colours in the palette. Since the entire palette is evenly distributed across colour space, we only need to modify the range of perturbation along each axis. The dithering equation then becomes: