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 :
2026年，跨境电商告别了依靠信息差的“野蛮生长”期，正式进入“精耕细作”的韧性时代 [18]。尽管面临关税波动及全球贸易格局重构的挑战，中国产品的国际竞争力提升和多元化市场拓展（如东盟、拉美、海合会等“美国+N”布局）依然支撑着出口的高质量增长 [1, 13, 18]。，详情可参考safew官方下载
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圖像來源，US House Oversight Committee