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YCbCr is sometimes abbreviated to YCC.Typically the terms Y′CbCr, YCbCr, YPbPr and YUV are used interchangeably, leading to some confusion. The main difference is that YPbPr is used with analog images and YCbCr with digital images, leading to different scaling values for U max and V max (in YCbCr both are ) when converting to/from YUV.
00 = RGB 4:4:4 01 = RGB 4:4:4 + YCrCb 4:4:4 10 = RGB 4:4:4 + YCrCb 4:2:2 11 = RGB 4:4:4 + YCrCb 4:4:4 + YCrCb 4:2:2 Display type (analog): 00 = monochrome or grayscale 01 = RGB color 10 = non-RGB color 11 = undefined Bit 2: Standard sRGB colour space. Bytes 25–34 must contain sRGB standard values. Bit 1: Preferred timing mode specified in ...
The three values of the YCoCg color model are calculated as follows from the three color values of the RGB color model: [2] [] = [] [] The values of Y are in the range from 0 to 1, while Co and Cg are in the range of −0.5 to 0.5, as is typical with "YCC" color models such as YCbCr.
This can be very important when converting from Y′UV (or Y′CbCr) to RGB, since the formulas above can produce "invalid" RGB values – i.e., values below 0% or very far above 100% of the range (e.g., outside the standard 16–235 luma range (and 16–240 chroma range) for TVs and HD content, or outside 0–255 for standard definition on PCs).
This is achieved by encoding RGB image data into a composite black and white image, with separated color difference data . For example with Y ′ C b C r {\displaystyle Y'C_{b}C_{r}} , gamma encoded R ′ G ′ B ′ {\displaystyle R'G'B'} components are weighted and then summed together to create the luma Y ′ {\displaystyle Y'} component.
HSV is a transformation of an RGB color space, and its components and colorimetry are relative to the RGB color space from which it was derived. HSL ( h ue, s aturation, l ightness/ l uminance), also known as HLS or HSI (hue, saturation, i ntensity) is quite similar to HSV , with "lightness" replacing "brightness".
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If we consider how YCbCr relates to RGB, it's worth noting that there is no article titled "RGB" on Wikipedia, only an article on RGB color spaces.That article makes it clear that there isn't one single RGB color space, but rather multiple color spaces built on the RGB color model, each one with its own primaries, transfer functions, white points, etc.