https://au.mathworks.com/help/visionhdl/ref/visionhdl.colorspaceconverter-system-object.html
visionhdl.ColorSpaceConverter - Convert color information between color spaces - MATLAB
The visionhdl.ColorSpaceConverter System object converts between R'G'B' and Y'CbCr color spaces, and also converts R'G'B' to intensity.
color informationconvertspacesmatlab