"deloid" wrote in message
Someone posted a note indicating that they could tell exactly what was done
to a photograph by reading metadata. He knew from a posted photo where cloning had been done. How is that detective work done?
Hi.
They are telling porkies.
It is often possible to tell that an image has been in Photoshop, but there is no way the Meta Data could record what, or even if anything, had been done to it.
The clone stamp is a good example, because the number of times it can get clicked when doing editing, can run into the hundreds. If the meta data was going to record every action, its file size would soon exceed that of the image.
There are ways, (the easiest is to increase Contrast and or Density), which will often show up where something has been added or removed, because the editor has failed to get an exact match.
It is by no means certain that expert and careful editing could be detected.
Roy G
