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Question

How to tell if images are from same source/camera?

Hi - this is an odd request but I'd appreciate anyone's help if they know how to or forward me in the right direction. I suspect someone is up to no good by claiming they are pregnant and have sent me photos (found on the internet) of positive pregnancy test kits. The photos sent through on WhatsApp look different when comparing them (IMO) and was wondering if there's a technical way of knowing whether these photos come from the same source or taken in the same place?

These are the inconsistencies I could spot:
- image file size variance - although resolutions are the same, if they were taken by the same camera wouldn't they all be similar in file size?
- there are numerous marks when zoomed in on the individual digital stick ("2.jpeg") that aren't present on the photo with both sticks.
- the individual digital stick ("2.jpeg") has completely different lighting with a crystal clear screen vs the photo with both sticks taken together ("4.jpeg")
- the non-digital sticks look different - one looks like a "fatter" design when comparing to photo with both visible ("1.jpeg")

3 photos can be downloaded here

If anyone could help it would be greatly appreciated as causing a lot of stress!

Thank you.

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All Answers

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Answer
Re: photo's

In reply to: How to tell if images are from same source/camera?

Ask for the original photo's and look at the metadata.

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Metadata

In reply to: Re: photo's

Thanks for your reply. I'm aware of metadata, however, I feel as if there's a technical way of knowing whether the photos are different without metadata - I'm no photo editing expert, but I have measured ratio differences between the length and widths of the pregnancy window result (non-digital) when comparing 2 of the photos which cannot be possible if they are the same pregnancy sticks. I'd rather be very certain the photos are bogus before asking for the original photos and inspecting metadata.

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Answer
Nod. Check metadata.

In reply to: How to tell if images are from same source/camera?

But when it comes to legal cases you put the camera with the photos into the evidence pool/collection so there is no question.

Once the copy leaves the source it can be altered and if the source is lost, well no way to prove it.

I'm not a lawyer but have worked with some about this. Bottom line, if this is a legal case/issue, follow your lawyer's advice.

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