YUV色彩空间的物理意义从RGB转化为YUV时,Y分量代表灰度,但是计算Y时并不是将RGB三者平均而得的,RGB的权值并

上课只听了大概，细节记不得了，丢脸…… 在网上搜索了下，这些权值的确定是为了更符合人眼的感知。人眼对光谱中的黄-绿色区域更敏感，所以G对应的权值较大。 Luma can be relatively easly calculated from RGB channels by averaging the color values and giving more weight to some colors over others to find out the luma value. Scientists came up with weights that match human perception where green has high contribution, red half of that, blue - one third of red. Why this is the case is simply a matter of the way the brain works and this perceptive model is important in how YUV was developed. human color perception is most sensitive to light in the yellow-green region of the spectrum 参考：http://www.***.com/tutorials/color-perception.htm