1. A computerized method for comparing a first image of a scene and a second image of the scene comprising: a. providing the first image of the scene and the second image of the scene; b. using a computer, adjusting a given area of the first image to approximately equal the average intensity of a given area of the second image, the given area of the first image and the given area of the second image corresponding to the same location in the scene; c. using the computer, calculating the absolute difference in intensity between the given area of the first image after adjustment and the given area of the second image and identifying a selected portion of the given area of the first image where the absolute difference is above a threshold; and d. using the computer, adjusting the average intensity of the selected portion of the given area of the first image to approximately equal the average intensity of the corresponding portion of the given area of the second image and marking the selected portion where the absolute difference between the selected portion and the corresponding area in the second image is above the threshold.