1. A method of detecting defects in printed images comprising: operating a printer with a controller to form a first printed image and a second printed image on at least one image receiving member, the second printed image being a duplicate of the first printed image; generating with optical detectors first image data corresponding to the first printed image; generating with optical detectors second image data corresponding to the second printed image; generating with the controller at least one segment from the first image data corresponding to the first printed image; identifying with the controller sizes and shapes of edges for each segment in the first image data corresponding to the first printed image; generating with the controller at least one segment from the second image data corresponding to the second printed image; identifying with the controller sizes and shapes of edges for each segment in the second image data corresponding to the second printed image; identifying with the controller the second printed image as a duplicate of the first printed image in response to a correlation of the sizes and shapes of edges in each segment of the first image data corresponding to the first printed image to the sizes and shapes of edges in each segment of the second image data corresponding to the second printed image exceeding a predetermined threshold; generating with the controller difference data corresponding to a difference between the first image data corresponding to the first printed image and the second image data corresponding to the second printed image; and identifying with the controller a defect in the second printed image from the difference data.