generating image data representative of a scene using a two-dimensional photosensor array, said image data comprising a plurality of pixel values, wherein each photosensor in said photosensor array generates a pixel value;

identifying a defective photosensor;

determining a first pixel value and a second pixel value, said first pixel value corresponding to a first photosensor and said second pixel value corresponding to a second photosensor, said first photosensor and said second photosensor being located on a first axis, said defective photosensor being located on said first axis between said first photosensor and said second photosensor;

determining a third pixel value and a fourth pixel value, said third pixel value corresponding to a third photosensor and said fourth pixel value corresponding to a fourth photosensor, said third photosensor and said fourth photosensor being located on a second axis, said defective photosensor being located on said second axis between said third photosensor and said fourth photosensor;

calculating a first absolute value of the difference between said first pixel value and said second pixel value;

calculating a second absolute value of the difference between said third pixel value and said fourth pixel value;

wherein the value of a pixel value corresponding to said defective photosensor is the average of the pixel values corresponding to the lesser of either said first absolute value or said second absolute value.