1. A method of blending a pair of images, each image comprising a plurality of pixels having an intensity, the method comprising: determining a blending edge for each image, each blending edge comprising at least one group of pixels, with each pixel at a pixel position; determining an average intensity of pixels of the blending edges at each pixel position; determining a scaling factor based on a relationship between the average intensity and the intensity of the pixel of the at least one group of pixels of the blending edge at each pixel position of each image; determining a blending area for each image, each blending area comprising at least one group of pixels having a pixel at each of the pixel positions; and scaling the intensity of the pixel at each pixel position of the at least one group of pixels of the blending area of each image with the corresponding scaling factor.