Returns the zero value for YCbCr color conversion. \n
* When data type is unsigned Cb and Cr are shifted to 0-max.
* So before they can be used in conversion equations
* Cb and Cr values must be shifted back to fix the zero position.
* \ingroup color
Returns the zero value for YCbCr color conversion. \n * When data type is unsigned Cb and Cr are shifted to 0-max. * So before they can be used in conversion equations * Cb and Cr values must be shifted back to fix the zero position. * \ingroup color