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 :
Shares in company increased over 20% as investors were encouraged by CEO’s assertion that cuts will drive profits
，推荐阅读同城约会获取更多信息
曝 vivo X300 Ultra 全球首发索尼 2 亿像素 LYT-901
* Write a detailed test suite as you add more features. The test must be re-executed at every major change.