Image Forensics‎ > ‎

Up Down Curve

Another simple method to detect cloning in homogenous areas is to apply a curve with extreme contrasts.
This amplifies even little changes in contrast which can make cloned areas visible, since they break with the background gradient.

Example:
Original image (cc by greggman)

Removed plane from homogenous background

Applied up down curve with visible traces of cloning.



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elsamuko-up-down.scm
(3k)
El Samuko,
Oct 8, 2012, 12:17 PM
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up-down
(14k)
El Samuko,
Oct 8, 2012, 12:17 PM
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