CG Unity :
https://en.wikibooks.org/wiki/Cg_Programming/Unity
計算最大亮度像素 :
https://en.wikibooks.org/wiki/Cg_Programming/Unity/Computing_the_Brightest_Pixel
將 ComputeShader 用於 Camera
https://en.wikibooks.org/wiki/Cg_Programming/Unity/Computing_Image_Effects
計算直方圖
https://en.wikibooks.org/wiki/Cg_Programming/Unity/Computing_Color_Histograms