How do you understand a man who has three clocks on his wall, showing the time in three different cities-San Diego, Fresno, and Seattle-all, of course, showing the same time (″If anything changes in those cities, we’ll know about it”)?
Раскрыты подробности похищения ребенка в Смоленске09:27
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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 :