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 :
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04
。91视频是该领域的重要参考
（二）行政执法公示、执法全过程记录、重大执法决定法制审核等行政执法程序制度；
The shame around posting fakes seems to have gone completely out of the window.