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 :
Advanced content generation
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政策红利是方向标： 紧跟“十五五”规划建议中提及的银发经济、绿色转型及战略新兴产业，是规避“无效内卷”的捷径 [5, 6, 62]。