相机：观众的眼睛。这里用的是 PerspectiveCamera（透视相机）。
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 :
，详情可参考爱思助手下载最新版本
Этот конфликт сложный, практически неразрешимый. И никакого успеха посредничество в нем не сулит
杜耀豪的母亲与兄弟姊妹的合影，摄于1954年。（受访者供图）