JPEGSnoop is a handy little freeware utility for examining image files to see if they’ve been tampered with or altered. It also provides a load of additional information including details on the type of editing program used and the quality level the edited JPEG image was saved as. The interface is crude, but all you need to do is scroll to the bottom of the page of results and check out the Assessment section. Nifty piece of software if you’ve ever wondered whether a photo is real or fake. Could be very useful too!
Ever wondered if that UFO photo or sasquatch sighting is a fake? … or if that camera manufacturer’s sample images have been touched up? Simply open an image in JPEGsnoop and scroll down to the section titled, *** Searching Compression Signatures ***…The utility will compare the compression characteristics of the photo against an internal database of thousands of camera “signatures” to locate a match. If a match is found, the matching digital camera or editor is shown. If the signature matches a photo editor (such as Photoshop), then there is a good chance that the photo has been edited (i.e. not original!). The assessment line indicates one of four possible outcomes: * Class 1 – Image is processed/edited * Class 2 – Image has high probability of being processed/edited * Class 3 – Image has high probability of being original * Class 4 – Uncertain if processed or original