1. A method of reducing mosquito noise in an image having pixels and a representation of a background, comprising: determining a representative luminance value corresponding to the background, wherein the representative luminance value is a function of a comparison between a luminance value of a selected pixel in the image with a set of adjacent luminance values corresponding to luminance values of pixels that are proximate to the selected pixel; comparing luminance values of the pixels to the representative luminance value corresponding to the background, so as to determine a set of background pixels; and assigning to pixels of the set of background pixels average luminance values determined according to luminance values of adjacent pixels.