The above image was photoshopped. (purse strap still in her hand, botched background) We've come to expect this in advertising, albeit with a little more attention to detail. In a court of law, however, obvious problems arise. Neal Krawetz shows how he dissects a picture. (link below picture)
In this case, the ELA shows a couple of things. First, the entire dress was modified. If you visit their web site, you have the option to select a dress color and they digitally add in the color. So the color of the dress is not original. The ELA also has high values on her eyes and mouth. Those were digitally enhanced. This coloring also shows up in the 2nd and 3rd principal components. Basically, the artist brightened her teeth and tweaked her eye color...
This Link gives you access to a image error level analyser. (the program remains on the authors site, it renders the picture, you do what you want with the information) Another tool to go with that big grain of salt in your work-kit.
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