1. A method for processing two-dimensional images when creating a three-dimensional model of an object, the method comprising the steps of: a. capturing a plurality of images of the object under lighting conditions in which the image is backlit such that the background in the image is lit and the object is not lit, the images comprising a set of pixel data with each pixel containing a light intensity value which describes the image; b. capturing an image of the background under the backlighting conditions where the object has been removed before capturing the image, the image comprising a set pixel data with each pixel containing a light intensity value which describes the image; c. examining each of the light intensity values of each pixel in the image of the background and building a first histogram which groups light intensity values within the image of the background into distribution categories; d. creating a first mask to identify those pixels within the image of the background which fall into the distribution category that has the most pixels, the first mask keeping unmasked those pixels which fall into that distribution category and keeping masked those pixels which do not fall into that distribution category; e. selecting one image from the plurality of images of the object; f. examining each of the light intensity values of each pixel in the selected image of the object and building a second histogram which groups light intensity values within the selected image of the object into distribution categories; g. creating a second mask to identify those pixels within the image of the object which fall into the distribution category of those pixels that have the lowest light intensity values, the second mask keeping unmasked those pixels which fall into that distribution category and keeping masked those pixels which do not fall into that distribution category; h. matching the unmasked pixels in the first mask to corresponding unmasked pixels in the second mask and where corresponding matches can be found using the light intensity values of each such pixel pair to solve for a scaling coefficient and an offset coefficient; and i. using the coefficients to process the remaining images of the object and identifying within those images those pixels which describe the object.