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Wouldn't you need a reference picture to compare two cameras? Or would you be able to determine which camera took a specific picutre if you get hold of it and c
by nextlevelwizard 6y ago
Wouldn't you need a reference picture to compare two cameras? Or would you be able to determine which camera took a specific picutre if you get hold of it and can take test pictures? Or can you just compare two completely separate pictures and determine if they are taken with the same camera? If you can then that means protestors/anarchists who intend on documenting what is going on and want to stay anonymos should buy a sort of "burner" camera that they do not use for anything else.
- hyko 6y agoThe first rule of hand wavy forensic pseudoscience club is that there are no rules, you just need to be able to bamboozle a jury.
- specialist 6y agoaka Agile Forensics
- kergonath 6y agoYou can analyse things like vignetting, distortion and chromatic aberration to identify a camera model or family. I suppose you could also look for details in AI-processed photos to try and identify the processing software, possibly down to the software version. It would work with phones, for example. Not with manually processed photos, though. The dark noise pattern is specific to each sensor, so if you can reliably get this, you could identify specific devices. So, there are caveats but you can get a lot of information. It's probably a good idea to use a common phone or cheap camera. And change date and time, and make sure it does not leak anything in the EXIF metadata. And make sure that the sensor does not have any dead pixel, because that would be a dead giveaway.
- ersinesen 6y ago[Shameless plug] This app removes that fingerprint (i.e. PRNU): https://www.esenbil.com/photoclean https://www.esenbil.com/photoclean