Instead of perturbing each pixel in the input image at random, we can choose to dither by a predetermined amount depending on the pixel’s position in the image. This can be achieved using a threshold map; a small, fixed-size matrix where each entry tells us the amount by which to perturb the input value , producing the dithered value . This matrix is tiled across the input image and sampled for every pixel during the dithering process. The following describes a dithering function for a 4×4 matrix given the pixel raster coordinates :
Жители Санкт-Петербурга устроили «крысогон»17:52
，详情可参考搜狗输入法2026
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第四条 行政执法监督工作坚持中国共产党的领导，坚持以人民为中心，推动实现行政执法政治效果、法律效果和社会效果有机统一。