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 :
退休移民官、基督教角聲佈道團紐約事工總幹事陳熾牧師接受BBC中文訪問時指，一些華人餐館、超市、美容店、按摩店、洗衣店等也是ICE會進行調查及執法行動的地方，這些行動也會引來華人社群的擔憂。
。搜狗输入法下载是该领域的重要参考
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funding for the public good.