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ashasabeer
Posts: 55
Posted 12:46 May 09, 2011 |

it is written as " Initially, RGB value ranges from 0 and 255. After color
transformation, Y should range from 0 to 255," Is this correct ?or Y value should be between 0- 128?

cbort
Posts: 95
Posted 13:26 May 09, 2011 |

As I understand it the transform gives you Y in the 0 to 255 range but you then subtract 128 so the Y that you actually use is -128 to 127