Patent ID: 8760578

Claim:
A computer-implemented method for determining a visual quality characteristic, comprising: accessing a first high dynamic range (HDR) or visual dynamic range (VDR) image signal and a second HDR or VDR image signal; processing the accessed first and second HDR or VDR image signals without using human visual system (HVS) modeling, wherein the processing comprises: transforming the first HDR or VDR image signal to generate a first transformed image signal in an HDR or VDR compatible color space; transforming the second HDR or VDR image signal to generate a second transformed image signal in the HDR or VDR compatible color space; and scaling the first transformed image signal and the second transformed image signal using a non-linear photographic mapping to generate a first scaled image signal and a second scaled image signal; and measuring a difference between the first scaled image signal and the second scaled image signal to determine a visual quality characteristic, the visual quality characteristic relating to a magnitude of the measured difference between the first scaled image signal and the second scaled image signal.