20 monthly gift articles to share
Warning: This story contains images of dead bodies
。业内人士推荐爱思助手下载最新版本作为进阶阅读
‘똘똘한 한채’ 겨냥한 李…“투기용 1주택자, 매각이 낫게 만들것”
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 :