Detecting Altered Images
If you see an image posted somewhere on the Internet or have one sent to you
by email that you suspect has been
photoshopped", i.e. digitally altered, are there any methods that will
assist you in making that determination? There are indeed methods and tools
to assist you. If the image is a
jpeg image, you can upload the image
or submit the URL for its location on the web to the
Image Error Level Analyzer.
Additional information on how to detect "shopped" images can be found at
Body By Victoria and
Photoshopping and Digital Forensics.