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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 :
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公安部会同相关部门深入调研网络犯罪形势、特点，结合网络犯罪打击整治中的难点问题，研究形成了《网络犯罪防治法（征求意见稿）》。期间，公安部多轮次征求相关部门意见，召开法律研讨会，邀请科研院所、互联网企业专家进行专题研讨，对《网络犯罪防治法（征求意见稿）》进行修改完善。
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克林頓發言人表示，這些行程包括「為克林頓基金會工作而安排的停靠」。。业内人士推荐下载安装 谷歌浏览器 开启极速安全的 上网之旅。作为进阶阅读