Patent Document ID: 10157446
Application ID: 15335643
Patent Status: 1

Claim One:
1. An image processing system configured to determine an intrinsic colour component of one or more objects present in a sequence of frames, for use in rendering the one or more objects, wherein some of the frames of the sequence are to be used as lighting keyframes, the image processing system comprising: lighting determination logic configured to: determine, as a linear combination of spherical harmonic coefficients, a lighting estimate for a lighting keyframe A of said sequence of frames; determine, as a linear combination of spherical harmonic coefficients, a lighting estimate for a lighting keyframe B of said sequence of frames; and determine a lighting estimate for an intermediate frame positioned between the lighting keyframes A and B in said sequence of frames, by interpolating the respective spherical harmonic coefficients between said determined lighting estimates for the lighting keyframes A and B of said sequence of frames; and intrinsic colour determination logic configured to use the determined lighting estimate for the intermediate frame to separate image values representing said one or more objects in the intermediate frame into said intrinsic colour component and a shading component, wherein the intrinsic colour component is for use in rendering said one or more objects.