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While there are quite a few software applications that compare images in order to find duplicates, there is only one solution that has own unique comparison algorithm. While most applications can only locate duplicate images of the same format, Image Comparer™ will identify the same images even if one is a JPEG and another is a Bitmap image. Furthermore, Image Comparer™ can identify duplicate images even if they have different sizes and resolution settings. Program's unique algorithm can even identify similar images. The program shows the degree of similarity; 100% means the two images are identical, 95% means that one of the images was probably altered and so on."If you have thousands of images on your computers, trying to determine if you have any duplicates can be difficult and time consuming. Image Comparer is able to search your hard drive and determine if you have any duplicate images and how much space you can save by removing them. The only limitation I see is it doesn't support any RAW formats so you can't see if you have any duplicates of RAW images you really don't want.