Multispectral lighting reproduction
AssigneeUniversity of Southern California
InventorsPaul E. Debevec, Chloe Legendre, Sumanta Pattanaik
Life of this patent
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Abstract
Systems and techniques for multispectral lighting reproduction, in one aspect, include: one or more light sources having different lighting spectra; and one or more computers comprising at least one processor and at least one memory device, the one or more computers programmed to drive the one or more light sources directly using intensity coefficients that have been determined by comparing first data for a multi-color reference object photographed by a camera in a scene with second data for the multi-color reference object photographed when lit by respective ones of the different lighting spectra of the one or more light sources.
Claims29
A system comprising:
- one or more light sources having different lighting spectra;
- and
- one or more computers comprising at least one processor and at least one memory device, the one or more computers programmed to drive the one or more light sources directly using intensity coefficients that have been determined by comparing first data for a multi-color reference object photographed by a camera in a scene with second data for the multi-color reference object photographed when lit by respective ones of the different lighting spectra of the one or more light sources.
A method comprising:
- determining light intensity coefficients by minimizing a difference between (i) photograph of a multi-color reference object taken by a camera in a scene and (ii) a recorded set of multiple bases for an appearance of the multi-color reference object from photographs taken of the multi-color reference object when lit by respective ones of multiple light spectra;
- driving light sources in a lighting stage directly using the determined light intensities coefficients;
- and
- capturing imagery of a subject in the lighting stage illuminated by the light sources as they are driven using the determined light intensity coefficients.
A non-transitory computer-readable medium encoding a computer program operable to cause data processing apparatus to perform operations comprising:
- (a) determining light intensity coefficients by minimizing a difference between (i) photograph of a multi-color reference object taken by a camera in a scene and (ii) a recorded set of multiple bases for an appearance of the multi-color reference object from photographs taken of the multi-color reference object when lit by respective ones of multiple light spectra;
- (b) driving light sources in a lighting stage directly using the determined light intensities coefficients.
Dependencies are inferred from the claim text.