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 :
持之以恒筑牢根基，确保长久守牢不发生规模性返贫致贫底线——，更多细节参见heLLoword翻译官方下载
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await dropOld.writer.write(chunk2); // ok，推荐阅读safew官方下载获取更多信息
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