Patent ID: 8531379

Claim:
A method for determining an image compensation method, said method comprising: a) selecting a reference ambient illumination level; b) determining a reference retinal response based on said reference ambient illumination level using a retinal model, wherein said retinal model preserves retinal response under different ambient light levels by employing a relationship described in the following equations: R ⁡ ( Y , α ) = Y n Y n + α n α = c 1 · ( Y Adapted ) b + c 2 wherein Y is a measured display luminance value, Y adapted is an ambient luminance value, n is a retinal response exponent and c 1 and c 2 are constants and b is a constant that varies between 0.5 and 1; c) determining an actual ambient illumination level in the vicinity of a display; d) determining an actual retinal response based on said actual ambient illumination level using said retinal model; and e) determining an image compensation value based on said reference retinal response and said actual retinal response.