|Which one is real ?|
Like User52, ever wondered if a digital image has been altered? Improvements in photo manipulation softwares such as Photoshop and GIMP have made image alteration both easier to commit and harder to detect.
But now thanks to a small software called JPEGsnoop, anyone can determine if a photo is edited using any photo editing software. Though not foolproof, this free and portable utility for Windows does a great job at detecting if an image is original or it has been altered.
First download JPEGsnoop from here and extract JPEGsnoop.exe anywhere on your computer. Start the software and check “I have read the terms” box and click OK (see screenshot below).
Program's main window will appear, now drag the image to this window and wait for the report to generate. Scroll down to the last paragraph of this report and look for the word "assessment". Here if it says “Image is processed/edited”, then the image is surly been altered by software means. Chances are, directly above that that line you may even find what program was used to edit the image!
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The only drawback of JPEGsnoop is that it can't predict what portions of the image has been altered and to what extent the modified image is different from the original one. That is, it can tell if an image has been altered from its original but not by how much.
Image Error Level Analyzer is a great online tool, using which, you can perform a quick scan of a JPEG image and analyze which sections might be modified. You can even play with the quality slider to spot anomalies in the error level.
FotoForensics is another online tool that's worth mentioning here. Do check their tutorial page that demonstrates different modification levels with sample photos.
Mac Users can use the software Photo Sniff ( priced at $1.99 in the Mac App Store) to accomplish the same.
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