Notifications
Clear all

Layers in photos.

pajkow
(@pajkow)
Member

Hi All,

I am looking for a forensic software to analyze photos to detect layers. I need to examine photos like jpg or png. I would like to be able to check with a good level of certainty if some parts of the photos were modified. I tried jpeg snoop or Irfan View but this does not provide that level of certainty. Is there a pro tool with the license for this type of jobs?

Quote
Topic starter Posted : 15/03/2021 10:42 pm
Passmark
(@passmark)
Active Member

JPG file format doesn't support 'layers'.

They do, sometimes, support internal thumbnails. And not all editing tools will update the thumb(s).

ReplyQuote
Posted : 17/03/2021 2:31 am
pajkow
(@pajkow)
Member

@passmark - yes, that is right, however I am looking something rather like “an end product” of editing so for e.g. in Adobe Photoshop Menu File> Save As FILE Name+ JPG format or PNG.  In here I am not too sure if there would be original thumbnails still embedded. I am yet to test this.

So, I am rather looking for a tool that would tell me more about pixels saturation in certain areas, specific channel examinations and similar stuff. I am not that expert in this area but looking for a pro tool that I can use and learn.  

ReplyQuote
Topic starter Posted : 17/03/2021 10:20 am
azrael
(@azrael)
Senior Member

There are a bunch of open source tools out there which address various aspects of what you are asking for. May I suggest that you take a look at the following material by Hany Farid ( or buy his book ... ) to get some specific search terms, and then you'll both be able to find the tools that you seek & understand what they are doing ! 🙂

https://farid.berkeley.edu/downloads/tutorials/digitalimageforensics.pdf  

ReplyQuote
Posted : 17/03/2021 11:30 am
pajkow
(@pajkow)
Member

@azrael

Looks like a good read!, TY.

ReplyQuote
Topic starter Posted : 17/03/2021 3:08 pm
Share:
Share to...