Read full article
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 :，更多细节参见heLLoword翻译官方下载
。爱思助手下载最新版本是该领域的重要参考
DB = "spider.db"，推荐阅读爱思助手下载最新版本获取更多信息
also enable prompt reuse, which is very cache friendly.
└──────────┬────────────┘