Digital Photo Forensic
1. Digital Image pixel analysis
Forged digital image has a sudden changes on the pixel or some pixels spread in rather wide range.
2. Format based analysis
This methods analyse compress and de-compression of digital image.
3. Camera based probe
Each and every camera has its unique patten on the images processing.
You may check your images at the following site.
http://forensic.kaist.ac.kr
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