1. A method for processing a digitized image having pixels aligned in rows and columns and having color intensity values for each of a plurality of colors, each pixel having a color intensity value for only one of the colors, the method including for successive first pixels: deriving a first local average value, which is the local average value of the color intensity value of the color which is present in the first pixel; deriving a respective local average value of each of the other colors; for each of the other colors deriving a respective color correction factor proportional to the local average of that other color and inversely proportional to the first local average value; and deriving an interpolated color intensity value for each of the other colors as the color intensity value of the color which is present in the first pixel multiplied by the respective color correction factor.