1. A method for processing a set of image data points representing an image and being detected by a detector array comprising array elements wherein each array element is responsive to only one of a first color and a second color, said method comprising the steps of: generating a color test pattern comprising said first and second colors; detecting, with said detector array, first actual output responses for at least one neighborhood of array elements, said neighborhood of array elements being responsive to corresponding pixels in the color test pattern, where each said neighborhood has a given array element responsive to the first color; measuring the second color of the given array element of each said neighborhood of array elements in the color test pattern to determine a first actual color content related to the given array element; determining a set of weighting values which relate said determined first actual color contents with the first actual output responses; storing the set of weighting values; detecting, with said detector array, second actual output responses of each said neighborhood to a subject image; and determining second actual color contents, responsive to said second color of said given array element of each said neighborhood corresponding to pixels in the subject image, which second actual color contents are related to the second actual output responses by the stored weighting values.