Patent ID: 8620102

Claim:
An imaging device comprising: a pixel array, the pixel array outputting a plurality of pixel values; and an image processing unit coupled to the pixel array, the image processing unit being operable to correct a responsiveness of pixels in the array by applying respective positional gain adjustment values to the pixel values, wherein a positional gain adjustment value for a particular pixel value associated with a first row of pixels is the value of a first generic piecewise-quadratic correction function as defined by a first set of stored parameters and a positional gain adjustment value for a particular pixel value associated with subsequent rows of pixels is the value of the first generic piecewise-quadratic correction function as defined by a set of calculated parameters, the sets of calculated parameters defining the first generic piecewise-quadratic correction function being determined by a second generic piecewise-quadratic function as defined, for each calculated parameter defining the first generic piecewise-quadratic function, by a respective one of a plurality of second sets of stored parameters.