#Deepfakes are everywhere, but #DigitalForensics investigators are fighting back:
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#Deepfakes are everywhere, but #DigitalForensics investigators are fighting back:
@FabMusacchio @peterdrake In so-called AI-generated or OCR-based image descriptions, AI is often spelled Al.
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@FabMusacchio @peterdrake In so-called AI-generated or OCR-based image descriptions, AI is often spelled Al.
@pesh @FabMusacchio ... and in the font used by Tusky, those are indistinguishable.
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@NatureMC @ilusenn @FabMusacchio Definitely not a fan either but I am aware of where this one leads (or, at least, should).
@JonnyT
On Mastodon, real URL length does not count in the character limit of a post. URL shorteners on Mastodon have many drawbacks but no advantage.
@NatureMC @ilusenn @FabMusacchio -
@Steel_Virgin @FabMusacchio The goal wasn't to show that picture was fake. The goal was to show the technique of analyzing vanishing point perspective errors.
@isaackuo @FabMusacchio I understand. But I'm not sure it so relevant to test the efficiency of this technique on pictures that are so bad you can tell by looking at it.
I have another technique to show you ! I personally test if pictures are real photographs by counting the fingers of the hands of human figures.
Here are an example of the efficiency of my method. Very solid proof.
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It's not the sun's rays that meet at a point, it's the lines from the objects' shadows to the corresponding points on the objects that should meet at a point.
The statement about the sun's rays being effectively parallel just means that the direction of the light source can be considered the same for all objects.
@leadore @leah @f4grx @FabMusacchio I'm still bothered though: the shadows of those cubes are all splayed-out relative to one another, but in actual sunlight they should be parallel to one another. But the "proof that it's fake" seems to ignore that?
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#Deepfakes are everywhere, but #DigitalForensics investigators are fighting back:
@FabMusacchio Flat-earthers will not understand this
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#Deepfakes are everywhere, but #DigitalForensics investigators are fighting back:
@FabMusacchio but this doesnt work.
once held a school presentation on moon landing conspiracy theories. on of the main arguments is "the lines dont match".
this is an issue inherently in photography.
here is a site talking about it (theory 1) https://www.rmg.co.uk/stories/space-astronomy/moon-landing-conspiracy-theories-debunked -
@JonnyT
On Mastodon, real URL length does not count in the character limit of a post. URL shorteners on Mastodon have many drawbacks but no advantage.
@NatureMC @ilusenn @FabMusacchio -
Good points… except the bad one: the dinosaur graphic shows a line connecting different toes to the horizon
@DavidM_yeg @FabMusacchio To be fair, it’s hard to find matching toes in that picture. AI images are notoriously bad at producing identical reflections, and this one is no exception.
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@DavidM_yeg @FabMusacchio To be fair, it’s hard to find matching toes in that picture. AI images are notoriously bad at producing identical reflections, and this one is no exception.
The matching toe isn’t necessarily visible even in a real image. In this case, it’s definitely a human error because they chose an inside toe on the figure and an outside toe on the reflection. That would be an analysis error whether the image was real or generated.
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@leadore @leah @f4grx @FabMusacchio I'm still bothered though: the shadows of those cubes are all splayed-out relative to one another, but in actual sunlight they should be parallel to one another. But the "proof that it's fake" seems to ignore that?
@seachaint @leadore @leah @f4grx @FabMusacchio because the sun is at a distance, parallel lines meet at a vanishing point, like train tracks.
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@Deixis9 what's the origin of the image?
Thanks
I see that it's commercialised e.g. <https://lovingsquad.com/product/ai-slop-is-not-art-chatbots-are-not-your-friends-shirt/>, <https://pagtee.com/product/t-shirt/1926944-ai-slop-is-not-art-chatbots-are-not-your-friends-cyborg-painting-flames>, <https://zerevia.com/product/t-shirt/1926944-ai-slop-is-not-art-chatbots-are-not-your-friends-cyborg-painting-flames>, <https://www.spellingmistakescostlives.com/product-page/copy-of-ai-slop-is-not-art-chatbots-are-not-your-friends-sticker>, however there's no real acknowledgement of an original artist; no credit, as far as I can tell.
@fuzzy @Deixis9 @FabMusacchio It's my original image, but thanks for finding that page, it's a counterfeit t-shirt website that rips off artist designs. I'll try get them to take it down
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@seachaint @leadore @leah @f4grx @FabMusacchio because the sun is at a distance, parallel lines meet at a vanishing point, like train tracks.
@ghoppe @leadore @leah @f4grx @FabMusacchio While that is technically true, the splay of shadows on Earth is negligible and nearly imperceptible in real life. In the example image it's as if the sun is a lamp a few metres away.
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@leadore @leah @f4grx @FabMusacchio I'm still bothered though: the shadows of those cubes are all splayed-out relative to one another, but in actual sunlight they should be parallel to one another. But the "proof that it's fake" seems to ignore that?
@seachaint
Yeah, I noticed that. All the example images have other things about them that are wrong and give them away as fake.I think the OP wanted to just focus specifically on how to check for lines that should meet at a point, as one kind of objective test we can use, and not get into all the other stuff.
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@AudeCaussarieu
J'aurais jamais pensé que les points de fuites pouvaient être une façon de vérifier la véracité d'une image. 🤯@mathieu_ @AudeCaussarieu fondamentalement, les AI generatives fonctionnent a l'echelle des pixels d'une image (ou video), et n'ont pas vraiment un model abstrait d'une scene (pas de plan 3D en tete)
C'est pour ca aussi sur les model plus vieux les doigts surnumeraires, les 3e mains mal placees, etc. Meme-si ces erreures la sont plus facilement corrigibles.
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#Deepfakes are everywhere, but #DigitalForensics investigators are fighting back:
@FabMusacchio in the first picture, the lines may be off by measurements inaccuracies. a mirror image depends on a perfect mirror on the physical mirror. and the shadows may be off by camera lens distortion.
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#Deepfakes are everywhere, but #DigitalForensics investigators are fighting back:
@FabMusacchio@mastodon.social If you think floor tiles are a good indication for parallel lines, you need to watch more CyFy videos
All jokes aside, this is a very good trick to spot AI content, and it still works with the most recent models. -
@NatureMC @ilusenn @FabMusacchio Definitely not a fan either but I am aware of where this one leads (or, at least, should).
@JonnyT I like using redirect checkers like WhereGoes, RedirectDetective, etc which I've found to be quite convenient
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@ghoppe @leadore @leah @f4grx @FabMusacchio While that is technically true, the splay of shadows on Earth is negligible and nearly imperceptible in real life. In the example image it's as if the sun is a lamp a few metres away.
@seachaint @leadore @leah @f4grx @FabMusacchio in most situations, shadow perspective is apparent when the camera is pointing towards the sun. It’s different if camera is overhead.
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@mathieu_ @AudeCaussarieu
Je suis quand même un chouilla réservé sur la première photo. Ok, elle semble générée par IA, mais les lignes de fuite sur lesquelles l'analyse se base sont un peu courtes. Difficile d'extrapoler sur un petit segment qui n'est pas nécessairement représentatif ni exact.
La méthode est intéressante mais pas toujours applicable@YannC @mathieu_ @AudeCaussarieu je crois que la chaîne qui rentre dans le bras gauche du soldat sur la gauche est un meilleur indice de fake que la perspective inexacte
