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sunhux

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how to detect an altered / doctored pdf & jpg image

What are the ways to detect if an image that was screen shot from original
source has been altered / doctored.  

Do list any freeware & professional tools
Avatar of Dave Baldwin
Dave Baldwin
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To be certain, you would have to have the original image to compare it to.
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Joe Winograd
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sunhux

ASKER

> What type of altering or doctoring were you hoping to detect?
Say a little picture was erased from the original image or
another image was super-imposed onto existing image
The properties would reflect date created and date modified and date accessed
You would have to have an original image to compare it against.  All the date info can be altered.
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Thank you sunhux