1. A method to generate color output signals in response to input signals from an image capture device, the method comprising: receiving first, second, and third input signals from the image capture device; generating an input scale factor (Σ) in response to the input signals; generating first and second chromaticity signals (p, q) in response to the input signals; mapping the first and second chromaticity signals to first and second preliminary color signals (x, y), wherein the mapping involves two-dimensional transformation of the first and second chromaticity signals to the first and second preliminary color signals respectively; mapping the first and second chromaticity signals to a preliminary scale factor ({tilde over (Σ)} out ), wherein the mapping involves a two-dimensional transformation of the first and second chromaticity signals to the preliminary scale factor; generating an output scaling factor ({tilde over (Σ)} out ) by multiplying the preliminary scale factor with the input scale factor; and generating a set of output color signals (X, Y, Z) in response to the output scaling factor and the first and second preliminary color signals.