(9+ messages) Understanding of color space YUV and RGB-A Fat Fish Blog-CSDN Blog https://blog.csdn.net/asahinokawa/article/details/80596655
YUV (also known as YCrCb) is a color coding method (belonging to PAL) adopted by the European television system.
YUV is mainly used to optimize the transmission of color video signals, making it backward compatible with old-fashioned black and white TVs. Compared with RGB video signal transmission, its biggest advantage is that it only takes up very little bandwidth (RGB requires three independent video signals to be transmitted simultaneously). Among them, "Y" represents the brightness (Luminance or Luma), which is the grayscale value; while "U" and "V" represent the chroma (Chrominance or Chroma), which is used to describe the color and saturation of the image. Specify the color of the pixel. "Brightness" is established through the RGB input signal by superimposing certain parts of the RGB signal together. "Chroma" defines two aspects of color-hue and saturation, which are represented by Cr and Cb respectively. Among them, Cr reflects the difference between the red part of the RGB input signal and the brightness value of the RGB signal. And Cb reflects the difference between the blue part of the RGB input signal and the brightness value of the RGB signal.