Patent ID: 9367916
Filing Date: 2016-06-14
CPC Classification: G06T,H04N

Claim Text:
1. A computer-implemented method of lens shading correction (LSC), comprising: obtaining at least one statistics grid of pixel data spatially corresponding to a frame; determining a reference point on the statistics grid depending on color shading data of the frame; generating LSC color values of a plurality of points on the statistics grid, wherein each LSC color value is associated with a color-related value from one of the plurality of points and a color-related value at the reference point; generating parameter variable values associated with a function and for each of the plurality of points with an LSC color value; determining parameter values of the function using the parameter variable values and the LSC color values; and computing lens shading correction factors for the plurality of points by using the function with the parameter values inserted into the function, wherein the LSC color values are only provided for points corresponding to one or more specified clusters of blocks of smooth and uniform areas of the frame.