1. A method of image processing, comprising: obtaining two images of a location; normalizing, by a processor, the two images to form two normalized images; registering, by the processor, the two normalized images; dividing, by the processor, corresponding pixels of the two normalized images into slope groupings, wherein the slope groupings comprise a first group with slope and a second group without slope; comparing, by the processor, the slope groupings to determine which corresponding pixels have a probability of change greater than a predetermined threshold; creating, by the processor, polygons to indicate areas of change in the two images corresponding to the pixels determined to have the probability of change greater than the predetermined threshold; and displaying the polygons to indicate the areas of change in the two images.