YUV 和 RGB 颜色互转的小工具 自己写的，最近用到了YUV色彩，网上很多算法，可是都不甚完美，花了两天才弄明白，写个小工具，内涵源码，方便测试和使用。-YUV and RGB color system conversion of a small tool to write their own, recently used the YUV color, a lot of online algorithms, but are not quite perfect, it took two day