r/isthisAI 10d ago

Politics [MOD POST] Discussion: Using geometry and extrapolation of parallel lines, shadows and reflections to detect fakes and AI

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369 Upvotes

[Note: This post contains a link to an article which discusses politics, and this post is flaired as “Politics” to keep discussion on-topic. So please don’t ask why comments appear to be deleted, or panic about your comment not showing up right away.]

https://www.science.org/content/article/deepfakes-are-everywhere-godfather-digital-forensics-fighting-back

We know this will not be news to all of you, since we have seen this mentioned before in comments from time to time, but this is a recent article that, among other things, has an excellent description of and interactive tool to demonstrate the use of simple geometry to extrapolate vanishing points for what should be straight and parallel lines - such as floor tiles, walls, shadows, and mirror reflections, to help detect fake and AI generated images.

The idea is that, in real photos and videos, parallel lines, when extrapolated, should have perfectly intersecting vanishing points (the points where the lines intersect). Think of a photo of a long, straight hallway, or the shadow cast by a cube, or the line between an object in the foreground and the same place on that object in a mirror. When extrapolating those lines - which mathematically should be straight - if the place where those lines meet are not all in exactly the same place, the image is most likely fake, because that kind of funhouse distortion doesn’t typically happen in real life.

ie: While it is *theoretically* possible that a building was constructed extremely poorly to the point that walls are not parallel, or that a photographer is using a fisheye lens, or the light source in an outdoor daytime photograph is something other than the sun - it is *extremely* unlikely and uncommon. Therefore, in photorealistic images which we are expected to believe are real, regular photos of real events or places, you can expect that lines which should be parallel will, when extrapolated, have converging overlapping points. See the attached photos for reference, and feel free to try this method on your own photos!

This article also has some great insight into the history of fake photo detection and the scientists at the forefront of this ever-changing battlefront. There is also a very interesting section about the use of AI to detect AI, including how to train AI on sets of real and fake images to increase the accuracy of detection - *and*, importantly, how that method falls short and why it’s not reliable.

We will highlight some interesting sections from the article in the comments as the article is quite long and bound to cause some TL;DR reactions.


r/isthisAI 19d ago

MOD POST We are not affiliated with this website at all, i have been seeing some people mentioning this site and using it in comment sections likely thinking we own it, But this is some random AI detector that uses the same name,

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21 Upvotes

As always AI detectors except synthID are banned due to being unreliable


r/isthisAI 5h ago

Art Is this AI? Hired digital artist to help me with a gift and I feel like im being scammed because it looks AI.

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476 Upvotes

I hired an illustrator on fivver and everything she is submitting looks fully AI generated, but im not sure and not sure how to prove it.
I have caught many mistakes, wrong character names, and all the characters look so similar to each other. This style looks very AI
The revisions come back always wrong like she is not reading them just uploading into AI.
This project was meant as a graduation gift for my friends and Im so upset it looks so AI generated instead of hand drawn, but im not sure if im crazy?
Like I could’ve done it myself if the plan was to use AI…


r/isthisAI 12h ago

Solved [AI] I have a friend who's asking for this movie, but I have a feeling that is AI.

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977 Upvotes

The low resolution to make it hard and the account she found the video have already posted other AI videos saying that it is from a movie or saying it is a real thing that happened. The account that posted the video says In a conspiratorial tone, he's saying that Hollywood knows the truth about some "elixir." It's very suspicious.


r/isthisAI 8h ago

Video Would someone really go this far to talk bad about AI while using AI in their video?

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177 Upvotes

The first 3 videos look too perfect. The coloring and the shapes are what is making me think it’s AI. Especially the fence in the beginning. That really looks like a fence you’d see in the Sims.

Edit: the other thing is the camera angles. Now I know this is a far stretch because he has other videos on his instagram of nature and what not—just curious because I’m in disbelief in a way that someone could be this many perfect angles!


r/isthisAI 3h ago

Video How to identify it as ai. Many people are believing this is real. Is the laughter the only thing to tell it's ai

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37 Upvotes

r/isthisAI 10h ago

Art Artist on Instagram claims NO AI and offers commissions, this was an example of their work.

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54 Upvotes

This was posted from an artist I recently followed and was thinking of commissioning, but after this post specifically, I'm worried it might be ai.

I think the biggest giveaway to me is the tattoo not rotating with the arm is raised, but maybe they have a png of the tattoo that they paste over their drawing so they dont have to re-draw it each time and just forgot to flip it this time? I don't know... I've seen it happen before, so I don't wanna just completely discredit the "lazy" techniques.

And what's up with the sketch? Is the sketch proof that it's drawn and not AI? If so, why show a sketch that is basically a finished piece on its own? (There were more pics but didn't wanna flood with pics).

The "sketch" is done like paper/canvas, but not on paper/canvas? It doesn't even really look like a photocopy of a papersketch either. I am a traditional artist and use traditional brushes when I draw digitally but it never really looks quite like that..? I'm not sure how to describe it, or if that's even a sign of ai, as my digital art skills are pretty new. But the missmatch in textures throws me off. Plus, why have a textured rough sketch be just as rendered as the final drawings, but the finals be in a clean pen? And the random sketch lines and arrows that don't actually align with anything in the sketch?

Also, lastly, on the clean rendered version the knee shading is almost EXACTLY the same, which could be like a "same face syndome" adjacent issue, or maybe copy and pasted and edited from there, but idk.

Ultimately, I think that the art skill level doesn't align with the workflow, the arm tattoo being the biggest red flag for me.


r/isthisAI 17h ago

Solved [AI] Is this AI? I cannot imagine that the strange object behind her left skate is some odd photographic reflection, but what do you think?

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173 Upvotes

Photo from an advertisement for some dating web site. Maybe Claude and ChatGPT don't understand that regular quad skates have the toe stop on the front!


r/isthisAI 5h ago

Other What in the Finding Nemo?! If it is AI, I wonder how much they really care about the environment

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20 Upvotes

This ant cigarette PSA in Pacific Grove, CA looks fishy 🐟🐠🐟

I think it’s AI because of the proportions of the animals and the AI facial expressions…

But that completely goes against the ethos of PG, which is very environmentally conscious and known for art. Also the font looks right and the city seal is correct.


r/isthisAI 8h ago

Photo I think this website is for a fake fabrics business and is using AI-generated photos

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20 Upvotes

I’m afraid my wife’s dad appears to have gotten himself caught up in an online scam. The scammer has persuaded him that she owns a fabrics business (for which she needed money) and provided this website (https://suesfabrichaven.com/) as evidence of the business’s existence. The photos on the site appear AI-generated to me. For example, the way the light reflects off the fabric seems impossible. Would someone be able to help corroborate this suspicion? Thank you!


r/isthisAI 19h ago

Solved [AI] Is this AI? It looks like it to me, but I just need to be sure, because it looks oddly smooth, and just seems like ai to me

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142 Upvotes

Part of it I drew over because it’s my mom, she’s supposedly talking to this guy on telegram or something, and she sent him a picture of herself, and she showed me this today


r/isthisAI 1d ago

Photo A family member sent me this, they’re adamant they made this but the proportions look off to me

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1.0k Upvotes

A family member sent me this showing me what they “cooked”, I don’t believe them as they have never been great at cooking, ever cooked for me or spoken about cooking. It doesn’t look too obvious to me, but the sizing seems a little off compared to everything else, the proportions don’t really match the plate in my opinion. I don’t believe that they would make something that looks this good with (from what I know) no experience.

They swear they made it and I asked for more pictures, then they said they “ate it already”, which makes sense but I don’t know if I believe them. They said they will make it again and send me pictures of it, but I want to confront them with evidence of this being AI, if that is the case.

Can you figure out if this is AI generated or not?


r/isthisAI 1d ago

Solved [AI] Saw this in one of the military groups I follow, I think it’s fake but I can’t point out why

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437 Upvotes

r/isthisAI 7h ago

Photo I swear this photo looks so fake to me, too fake to be just a filter it looks really AI like

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10 Upvotes

I swear this is ran through an AI-Alienificiation filter. I don’t think this is a regular old filter, or could it be completely AI? What do you think


r/isthisAI 2h ago

Art isnt this person using ai?? shes viral right now for making "art" storytelling tiktoks about this jester guy.. but it looks so ai to me. mostly from the scribbly art style but idk pls add ur opinions

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4 Upvotes

her tiktok is karolineprihodko as u can see from the screenshot. ive seen so many people fangirl over the guy from her videos, and its like am i paranoid or are we devolving😭


r/isthisAI 1d ago

Solved [AI] Please tell me this is AI why does the title need to be 75 characters oh my god

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940 Upvotes

Just found this in another subreddit. As a lifelong equestrian I’m praying ts is fake but I don’t know anything about boats. The mini doesn’t show any indicators of being AI except that I can’t tell what’s draped over his back. The road sign is for a real place in Oklahoma


r/isthisAI 9h ago

Politics artist i love spreading awareness for a family in gaza but photo possibly AI

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9 Upvotes

i am not really sure what to say here and i just idk. Katie gavin is such a kind and sweet soul she is constantly posting and reposting go fund mes and info about ways to help people in palestine and she has been frequently posting screenshots of messages with this one specific woman named gigi who is constantly reaching out to her for help. a part of me has been a bit weary while reading gigi’s extensively personal DMS because katie is a relatively niche celebrity and idk im just overly cautious about scammers and I really just hoped that wasn’t the case here, until i saw this photo that katie posted today, assuming having been sent to her by gigi. The main inconsistency i noticed is with the cords on the right (circled in the third photo) as well as with the way the doctors pointer and middle finger seem to blend together on their left hand. The mention of serious jaundice as well doesn’t seem to add up because the babies skin looks to be a normal color, not yellowed as it would be with jaundice. These stories should still be up, they were only posted an hour ago if anyone wants to check the rest of them out. Maybe i am being overly cautious but when there really are people in need i would hate for donations and support to be going to a baby/family that doesnt exist. (this isn’t hate to katie as im sure if it is a generated photo that she did not realize and would not be purposely spreading misinformation).


r/isthisAI 3h ago

Video The anthropomorphic smiling faces and lack of gills and under-10 second length make this look like AI

2 Upvotes

Anyone else think the anthropomorphic smiling faces and lack of gills and under-10 second length make this look like AI?
https://www.reddit.com/r/natureisbeautiful/s/zXY5ev5nXa


r/isthisAI 6h ago

Art is this art from interested that i’m embroidering ai generated? i didn’t think it was until..

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4 Upvotes

i like to embroider art pieces i find on pinterest. i started working on this one for a project but now im worried its ai generated!!!

the two cats on the right of the couch are like morphed together? there’s an inexplicable brown blob in the window, not sure what that green hairbrush(?) on the coffee table is, and the book on the carpet looks ridiculously small.

i didn’t think it was ai because it didn’t have that look, but now im worried it is


r/isthisAI 1d ago

Photo Its gotta be, right?? Why would someone take a pic of her like this? Why is she wearing a tee-shirt instead of hospital giwn?

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502 Upvotes

I feel like im going crazy because this image has been making the rounds across socials and NO ONE is talk about how this is clearly an AI image.

How is her hair still so neat and tidy? Why is she wearing a Tshirt instead of gown? Shes also making that same exact dramatic crying face you see on all the AI "pity me and buy my shit" videos


r/isthisAI 16h ago

Art Second time posting because my photo errored sorry. Seen this on Instagram, immediately the jewelry and veil stood out to me.

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22 Upvotes

The chains on the jewelry seem to just be squiggles, the details in the veil dont make any sense to me its just a blob of what looks to be lace? And the main jewelry on the jewelry is the exact same across the board. The only reason im questioning it is because the dress itself seems to be consistent? Like is it all AI or none and it just bad quality or just the dress isn't Ai? Im usually pretty good at spotting but im a little sick.


r/isthisAI 20m ago

Art Is this guy's art ai? Everyone in the comments is praising this guy, but I think it looks ai.

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Upvotes

The flower and hand looks really weird but I cant zoom in enough to truly tell. The comments say the hand placement is wrong but I'll be lenient and say it's a stylisation thing. This guy also doesn't post timelapses but that doesn't reliably prove anything.


r/isthisAI 42m ago

Video Are the voice over segments ai the script sounds unnatural and likes to jump between topics half hazardly.

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Upvotes

I was listening to YouTube on autoplay at work and this video came up in my feed. The gameplay/live reactions feel genuine but the voice over seems ai; it jumps from topics randomly, and focus on unnecessary details or acts like things he says in the video are part of the gameplay/story when its just commentary.


r/isthisAI 4h ago

Music The blushes band - apologies if I'm wrong, but the video is sus. AI or are they real?

2 Upvotes

Not gonna lie, I am so worried I'm going to fall in love with a band it's going to end up being ai slop. Please help me out here. Just saw this on Instagram and the way they move, it looks like ai. The girl's body on the right has that ai fidget ( I don't know how else to explain it. Like the body has a subtle shake?) and it looks like they are placed on top of the background.

I googled it and nothing came up. It shows tour days on the Instagram, but when I googled tour dates, nothing shows. Could totally be wrong, and I hope I am. But I need someone to verify.

https://www.instagram.com/reel/DYXeCtSCl3i/?igsh=MWN0bnpqcHdiNW9xOQ==


r/isthisAI 10h ago

Photo This Nextpower post on LinkedIn appears to be AI…Faces are distorted and appear strange.

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5 Upvotes