1. An imaging device comprising: a pixel array comprising a plurality of pixels arranged in columns and rows, the pixel array outputting a plurality of pixel signals, each pixel signal corresponding to a particular pixel of the pixel array; an adjustment circuit coupled to the pixel array and configured to correct at least one of the plurality of pixel signals by: determining a correction value for a pixel signal to be adjusted, the correction value being based on a respective row and a respective column of the pixel corresponding to the pixel signal to be adjusted, and at least one of a vertical correction value portion and a horizontal correction value portion; and applying the correction value to the pixel signal, wherein the vertical correction value portion for the pixel signal to be adjusted is determined from at least one of a plurality of vertical correction value curves, the number of vertical correction value curves being less than the number of columns in the pixel array, each of the plurality of vertical correction value curves representing vertical correction value portions for all pixels in a particular column of the pixel array with which the respective vertical correction value curve is associated, and wherein the horizontal correction value portion for the pixel signal to be adjusted is determined from at least one of a plurality of horizontal correction value curves, the number of horizontal correction value curves being less than the number of rows in the pixel array, each of the plurality of horizontal correction value curves representing horizontal correction value portions for all pixels in a particular row of the pixel array with which the respective horizontal correction value curve is associated.