alph2Z
I think this was the cleverer approach so far. I wasnīt aware of this kind of thing available on the net, thanks.
But, have a look on what the site claims:
"If parts of the image are from different source files, they may have been saved a number of different times, and thus they will stand out as a different colour in the ELA test."
I donīt think the image was manipulated in this way (say, the juxtaposition of different images). I think that itīs possible that the original image was only "hazed" at the center. I am not sure about the interpretation of the test, but I think that itīs not very suitable to detect this kind of manipulation.