Two-dimensional color transformations for wide gamut workflows in digital cameras

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 (Σout) 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.