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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 :
美国人工智能软件公司C3.ai周三表示，作为新任CEO斯蒂芬·埃希基安推动的重组计划的一部分，该公司将裁减全球26%的员工。同时，该公司还预测当前财季（第四财季）的营收将低于预期，这导致其股价在盘后交易中下跌了20%。（新浪财经），详情可参考谷歌浏览器【最新下载地址】
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