Color analytics for a digital image

1. A computer system which comprises:

a CPU; and

a memory storing an image file containing an image;

the CPU arranged and configured to execute a routine to determine multi-band intrinsic component information as a function of spatio-spectral information for intrinsic material and illumination for surfaces depicted in the image, expressed in a spatial extent of spectral characteristics, and calculate analytical information, as a function of the multi-band intrinsic component information, wherein the analytical information includes an illumination intensity histogram, a shadow depth and relative fill light color information.

2. A computer program product, disposed on a non-transitory computer readable media, the product including computer executable process steps operable to control a computer to: provide an image file depicting an image, in a computer memory, determine multi-band intrinsic component information as a function of spatio-spectral information for intrinsic material and illumination for surfaces depicted in the image, expressed in a spatial extent of spectral characteristics, and calculate analytical information, as a function of the multi-band intrinsic component information, wherein the analytical information includes an illumination intensity histogram, a shadow depth and relative fill light color information.

3. The computer program product of claim 2 including the further process step of displaying the calculated analytical information.

4. The computer program product of claim 2 wherein the multiband intrinsic component information comprises a multi-band illumination image.

5. The computer program product of claim 4 wherein the process step to calculate analytical information, as a function of the multi-band intrinsic component information, is carried out by calculating an illumination intensity histogram of the multi-band illumination image.

6. The computer program product of claim 5 including the additional process step of calculating a shadow depth indication as a function of the illumination intensity histogram.

7. The computer program product of claim 2 wherein the spatio-spectral

information comprises a characteristic spectral ratio.

8. The computer program product of claim 7 wherein the process step to calculate analytical information, as a function of the multi-band intrinsic component information, is carried out by using multi-band intrinsic component information inherent in the characteristic spectral ratio to represent relative fill light color.

9. The computer program product of claim 2 wherein the process step to determine multi-band intrinsic component information as a function of spatiospectral information for the image is carried out by determining multi-band intrinsic component information relative to a face depicted in the image.

10. A device comprising:

a CPU;

a memory storing an image file containing an image;

the CPU arranged and configured to execute a routine to determine multi-band intrinsic component information as a function of spatio-spectral information for intrinsic material and illumination for surfaces depicted in the image, expressed in a spatial extent of spectral characteristics, and calculate analytical information, as a function of the multi-band intrinsic component information, wherein the analytical information includes an illumination intensity histogram, a shadow depth and relative fill light color information; and a display, coupled to the CPU, for display of the analytical information.

11. The device of claim 10 wherein the CPU 12 executes the step to determine multi-band intrinsic component information as a function of spatio-spectral information for the image by determining multi-band intrinsic component information relative to a face depicted in the image.