1) Color space 
YCbCr, Y′CbCr, or Y Pb/Cb Pr/Cr, also written as {YCbCr} or {YCbCr}, is a family of color spaces used as a part of the color image pipeline in video and digital photography systems. Y′ is the luma component and CB and CR are the blue-difference and red-difference chroma components. Y′ (with prime) is distinguished from Y, which is luminance,...