Photoshop: It's Obvious

Error Level Analysis. Mainly used for JPEG pictures, ELA is used to verify if a JPEG image is resaved. How does it work? Everytime you re-save a JPEG image, it gets recompressed and it loses quality.

But how exactly does it work?

"Error level analysis allows you see to see the difference in quality level, represented by brightness. Things which are very bright have been edited most recently, whilst duller parts have been resaved multiple times. This allows you to see not just which parts of the image have been changed, but in what order the changes occurred." (Image Forensics)

Here is an online tool you can use to possibly verify if an image has been photoshopped. It's not 100% perfect and should be taken with a grain of salt. Photoshopping occurs almost anywhere and we are so blind-sided by magazines and online pictures that what we expect to be perfection, is actually just photoshopped distress.

http://errorlevelanalysis.com/ (Image Forensics)

-Cole Turner