周报 第25期
Texture Compression in 2020
- 主要涉及纹理压缩格式和库，针对的是GPUs，因此“PNG”，“JPG”不在讨论范畴内。
- use “block compression” format, to save sampling bandwidth, memory usage, and for faster texture loads.
- 简单的结论：
- On PC, you’d use BC7(modern) or DXTC(old) format.
- On mobile, you’d use ASTC(modern) or ETC(old) format.
camera and lens
- 各种交互性的小样子来介绍相机和镜头的工作原理
- record light by image sensor，曝光不足或者过曝
- A Bayer filter uses two green filters because light in green part of the spectrum heavily correlates with perceived brightness.
- The final step of obtaining a normal image is called demosaicing.
- 小孔成像相机
- cosine-fourth-power law（natural vignetting）
- Motion blur
- Glass，折射，反射等等