1. An article of manufacture comprising a tangible computer readable medium including data that, when accessed by a processor, cause the processor to perform operations comprising: generating an input block of coefficients in an input color space, wherein the input block includes a first type coefficient and a plurality of second type coefficients; converting the first type coefficient in the input block to an output value in an output color space; using the output value to determine a scaling factor for the second type coefficients; applying the scaling factor to the second type coefficients to determine second type coefficients in the output color space; and forming a component output block of coefficients in the output color space from the output value for the first type coefficient and the determined second type coefficients in the output color space.