1. A method for determining tonal corrected signals from incident light, comprising: receiving incident light in the form of first, second and third components; determining a luminance component as a function of one or more of the first, second and third components; determining a luma as a function of the luminance component using a piece-wise linear function that comprises piece-wise low-key, mid-tone and high-key functions for translating luminance values to luma values; determining a luminance gain as a function of the luma and the luminance component; determining a first tonal corrected signal as a function of the luma; and determining second and third tonal corrected signals as a function of the luminance gain.