182 pointsby smooke6 hours ago13 comments
  • himata41132 hours ago
    if you tell it to generate the AI image with a black background you can visually see the synthid with a good enough monitor, it's just a repeating fuzzy pattern, nothing special.

    I have found great success of getting rid of it by masking every 2nd pixel, regenerating missing pixels and then once again masking every 2nd pixel offset by 1.

    Used an off the shelf model to fill in the pixels, but I also exported a depthmap first (before any alternations) and denoised it so generated masked pixels comform to the original content. The result was obviously not 100% perfect, but with more time and a model fine tuned for this specific use-case would be able to remove any kind of ai watermarking without too many issues.

    • teravoran hour ago
      i wouldn't have any confidence in being able to remove a 0.5 bit watermark (presence/absence). what you see is probably a functional decoy.
    • userbinatoran hour ago
      but with more time and a model fine tuned for this specific use-case would be able to remove any kind of ai watermarking without too many issues.

      Always amusing to see AI used against itself.

    • tantalor2 hours ago
      But why
  • big_toast5 hours ago
    What information is included in the metadata or SynthID? How many bits can be encoded in a SynthID?

    Can it be used to create something like nutritional labels for synthetic content? 10% synthetic text, 30 synthetic images.

    Your reality was 15% synthetic today (75% mega corp, 25% open-weight neocloud).

    • big_toast3 hours ago
      I guess the SynthID-Image paper from Oct 2025[0] was an encoder-decoder for which they tested checking a flag or a 136 bit payload in 512x512 images and the watermark's robustness after various transformations.

      Presumably the deployed version is meaningfully different.

      [0]:https://arxiv.org/html/2510.09263v1

      • echelon3 hours ago
        This is very similar to audiowmark

        https://github.com/swesterfeld/audiowmark

        You can stuff per-item database unique IDs, user IDs, geohashes, and other nefarious things inside.

        We need to protest this LOUDLY.

        Our devices are being locked down, we're having attestation and trusted computing forced on us, the internet all over the world is undergoing age verification with full ID verification.

        Just because this is on "ai images" today doesn't mean it won't be on all images - screenshots, your camera reel, etc. - in the fullness of time.

        This is scary.

        These are the tools of 1984. They've been boiling the water slowly, but in the last year things have really started to pick up pace. Please push back. Loudly.

        Everyone at Google and OpenAI working on this: WHAT THE FUCK ARE YOU DOING. STOP.

        We have laws and mechanisms to prevent revenge porn, CSAM, defamation, etc. They are robust and can be made even stronger. We do not need to sacrifice the security of our privacy and our speech to fight imagined harms when the real danger is turning into an authoritarian society.

        • tadfisher33 minutes ago
          The point of SynthID is to make generated images identifiable, in an attempt to prevent 1984-esque situations where you can't believe your eyes and ears. Applying it to screenshots and camera output defeats its only purpose.

          If the powers-that-be want to enforce age verification, watermarking camera output is not the correct technology to do so. It would be something like HDCP, where camera manufacturers are given keys and a whole trusted media path is built so that the relying party can cryptographically enforce that a trusted camera is being used to capture live images.

          • raron8 minutes ago
            > The point of SynthID is to make generated images identifiable, in an attempt to prevent 1984-esque situations where you can't believe your eyes and ears.

            You can still use traditional methods to manipulate images, too, so I don't think a "does not contain SynthID watermark" means you can trust that image more. In the other hand, encoding a lot of personal and other information in the watermark (136 bit is a lot) that can not be easily removed and most of the people are unaware of it seems really an 1984-like dystopia.

        • 13 minutes ago
          undefined
        • Extropy_3 hours ago
          Most cameras already produce metadata. You can remove this metadata. Can you not also detect and remove watermarks?
          • big_toast2 hours ago
            The paper references some threat models they considered. They suggest someone might "possess paired information (both original and watermarked content)" and therefore be able to undo watermarking. Presumably it's fairly easy to get identity operations out of image APIs that would result in this situation. I'm not sure that addresses echelon's main concerns though.
          • alterom2 hours ago
            The metadata is kept separately from the original data, and is, by design, modifiable and removable.

            Watermark, by design, irreversibly modifies the original data, and is, by design, hard to remove without producing detectable artifacts (or rendering the data useless altogether).

            In short, the answer is no.

    • gumby271an hour ago
      Or perhaps a user id or fingerprint to an individual. We added that to printers long ago, this would easily enable that for every photo and image you generate too.
    • janalsncm3 hours ago
      Don’t think that would be possible. If I paste a synthetic piece into an otherwise organic image, the synth id isn’t going to know that.
      • animal_spirits3 hours ago
        Synth ID can detect parts of images with the watermark.
  • WhatIsDukkha4 hours ago
    This is just performative nonsense.

    As someone that creates things with tools with different media I would just hard avoid this tool that adds...

    arbitrary metadata not of my choosing.

    Should I seriously make a texture for a videogame with this weird DRM glorp in it?

    How old is photoshop and why is it exempt?

    • ericpruitt4 hours ago
      Just because something isn't perfect doesn't mean it's not useful. I've already seen posts online that were able to be proven as falsified because someone ran the images through Google for SynthID checks.

      > How old is photoshop and why is it exempt?

      For one, it's not developed by Google or OpenAI. The barrier to entry to making realistic but deceptive images with Photoshop is far higher than with AI, and there are already techniques that can, imperfectly, be used to detect the use of traditional image editing.

      • WhatIsDukkha2 hours ago
        So 999 people that are just making an image need to be DRM'ed so that you might catch the 1 person making "realistic but deceptive" images... like this is some kind of special case of ... internet images.
        • space_fountainan hour ago
          This isn't DRM right? This is metadata attached to the image that makes it clear it was synthetically generated. The public has a huge incentive to know when images are AI generated and the harm to legitimate users seems pretty small: aka someone might complain online that you use AI
          • WhatIsDukkhaan hour ago
            billions? of "fake" images not generated by ai but just photoshopped and ... not really harmful.

            There is no case that any of its particularly harmful outside of things like CSAM which is illegal.

      • bsderan hour ago
        I guarantee this works poorly, at best.

        If this actually works solidly, Google is in deep, deep, deep shit. It would mean that I can put a mark on my non-AI videos and demand that Google not allow upload of my identifiably copyrighted content.

        This would completely obliterate YouTube.

    • Jtarii3 hours ago
      >How old is photoshop and why is it exempt?

      I'm sure you can think of a couple things that differentiate gen AI from photoshop, I believe in you.

      • WhatIsDukkha2 hours ago
        The main difference is we are in the middle of a moral panic and people have lost perspective.

        Its a tool with different modalties and affordances.

        • surgical_firean hour ago
          When I saw the article I was initially skeptical. I do look down on OpenAI, Google, and other such companies.

          But on second thought it is not a bad idea to be able to have a quick tool to identify an image as AI generated.

          And after reading your reaction to it, I am sure now that the watermark is for the best.

          • WhatIsDukkhaan hour ago
            So you are in the"nothing to hide, nothing to fear" school of privacy rights?

            Only criminals and bad actors want private defaults?

            The burden of proof is proving there is some harm or problem that needs solving and noone has managed that in this thread or generally.

            • dylan60434 minutes ago
              Not sure what's to hide here. The caveat depends on what data is encoded into the watermark. If it's as simple as the date generated and the system that generated it so that it is easily identifiable as AI generated, I'm fine with it. Hell, I'd even say it'd be cool to embed all of the prompts used to generate the image. If it's also including the name of the user or account ID, then we start getting into gray areas. Since I'm not really on the AI hype train, I'm not all that opposed to that info either. I'll never use it so it won't affect me mindset kicks in on this one, but I'd be okay either way for/against embedding user identifiable info.
    • janalsncm3 hours ago
      Strictly speaking, DRM = digital rights management, which is related to intellectual property.

      SynthID would only be DRM if Google/OpenAI were claiming IP rights over their images. I don’t even know if that’s legal though.

      • WhatIsDukkha2 hours ago
        What value does "strictly speaking" bring to the discussion?

        So that you don't have to address any of the issues?

        • dylan60431 minutes ago
          Because DRM is primarily used to ensure the content is not shared in a way the owner does not allow. That is not what SynthID is doing. All it does is allow people to know it is a generated image specifically for when it starts to be widely shared on the internet.

          So strictly speaking brings a lot to the discussion when you actually think about it. Stating that DRM != SynthID is addressing issues where people seem to think that DRM == SynthID. Those people are wrong, and strictly speaking need to be corrected.

          • WhatIsDukkha21 minutes ago
            You are making a category error --

            "this image made by OpenAI" is a drm assertion

            You wont be able to assert copyright of the picture that you added an OpenAI red bowtie to, thats a DRM issue.

        • janalsncman hour ago
          Words matter? DRM means digital rights management, not simply any kind of metadata a person doesn’t like.
        • drdecaan hour ago
          Accuracy is valuable.
    • doctorpangloss6 minutes ago
      You: "performative nonsense! Arbitrary metadata not of my choosing!"

      Also you: well, games go through some kind of distribution, which has plenty of telemetry and metadata. Whether it is App Store with notarization, or Steam or Itch who collect analytics and know a lot about you, or your ISP if you self host your eclectic WebGL game from home. Posting on an iPhone or Android phone, to hacker News which has your email address, on your cell network which has IPv6 globally unique addresses...

      "But my choosing!" You'll say. It is extremely performative of you to say, "everything that would make me 200% wrong isn't valid."

      I don't know. I really hate these vibes-driven reactions to (checks notes) content attribution. Every accusation is a confession in this frame of mind. How do you not see that?

    • Barbing3 hours ago
      > How old is photoshop and why is it exempt?

      How does today’s maximum theoretical disinformation output per minute compare to 2021 Photoshop?

      • WhatIsDukkha2 hours ago
        Its 2026... people are deliberately choosing to live in their own realities with no care about objective facts or moral choices.

        So weird images are a big problem? No they don't matter at all.

        • Barbing2 hours ago
          Political deepfakes on the mind here more than weird stuff.
          • WhatIsDukkha2 hours ago
            "I could stand in the middle of 5th Avenue and shoot somebody and wouldn't lose any voters, ok? It's, like, incredible." — Donald Trump

            So what does a deepfake matter?

        • surgical_firean hour ago
          If they don't matter, neither does a watermark.
          • WhatIsDukkha43 minutes ago
            and you need the watermark to tell you the fish with the mustache is fake...

            What image is going to change your worldview so radically that the drm saves you?

            edit - to be clear you are watermarking 100,000 fishes with mustaches because of your concern over 1 image that "matters" (and you don't even have an image that matters in mind)

            • surgical_fire39 minutes ago
              Yes, let's pretend they are adding watermarks because of fishes with mustaches.
  • amazingamazing5 hours ago
    Good. Despite people saying it will be removed, I have seen no reproducible repo demonstrating it.
    • raincole5 hours ago
      Stable Diffusion with 10%~15% denoising strength. Done.

      I tested the day 1 when Nano Banana Pro was released and it worked. It still works today for Nano Banana 2.

      I didn't post this anywhere because I (arrogantly) thought saying it publicly would make the internet worse. But it was pure arrogancy: if I came up with this the first day then of course other millions of programmers did too.

      That being said, it'll introduce the typical artifacts from SD models and that might be detected by other methods (or just by zooming in a lot and looking carefully).

      • vunderba5 hours ago
        Yup, OOC a while back I put together a ComfyUI node that took in a NB image and start with the smallest amount of denoise strength using Flux.1 (but works with any model), then run img2img with a synthid check incrementing denoise in a loop until it was defeated.

        Never released it, but it was obvious to most people in the SD community that denoising using a diffusion model was a relatively trivial means to beat most steganographic watermarks.

        • londons_explore4 hours ago
          Yet is in itself fairly trivial to detect assuming you use some open-weight image model as a base.
      • zulban4 hours ago
        > if I came up with this the first day then of course other millions of programmers did too.

        Don't sell yourself short. I'm sure it was only hundreds of thousands.

      • amazingamazing5 hours ago
        Post a repro. I can do that too but then the similarity index is weak. The point is that it it looks indistinguishable then the integrity persists.

        In my tests the image looks clearly distinct. In other words, if you can tell the difference then it isn’t a good test.

    • DonsDiscountGas3 hours ago
      Probably a lot easier to use a different model in the first place
    • dvngnt_3 hours ago
      It will but many people won't as i've seen disinformation that could be detected by synth-id.
    • post_it_loser4 hours ago
      [flagged]
  • 4ashz2 hours ago
    First they verify whether a picture came from OpenAI, then they'll include subscriber data and geolocation.

    Well, they'll finally find out that no one wants to look at AI generated pictures or text. Once they do that, the tool will fail for the public and only work for the government.

    • Gigachad7 minutes ago
      Seemingly the only use for photo realistic ai generation is deception. We are already seeing AI generated video used in political ads in America.
  • CSMastermind5 hours ago
    Aren't these kinds of watermarks easy to remove or distort? Seems like they're only helpful as long as people are relying on them sparingly so it's not worth the effort to circumvent.

    If social media platforms started banning images with these watermarks seems like they'd be stripped out overnight.

    • amazingamazing5 hours ago
      No, they are very resistant to modification that can be done easily. That being said I doubt it is impossible
      • janalsncm3 hours ago
        Yeah cropping, color shifting, resizing and compression don’t remove it. That said, there’s pretty well known workarounds:

        https://github.com/wiltodelta/remove-ai-watermarks

        • surgical_firean hour ago
          The sort of people that generate AI images that need a watermark are not exactly the kind of people prone for this sort of effort.
      • snissn5 hours ago
        I’m surprised! I guess I’m being naive but I would imagine you could pass an image to an image model without synthid and have it reconstruct the image in a net new way without the markers. I guess I’m wrong? That’s cool if the watermarks are so deeply ingrained that they persist
        • cephei5 hours ago
          As I understand it, they modify the image by applying a special Gaussian noise filter which affects each pixel in the image in subtle (possibly not reversible) ways. The detecting service will look for this noise pattern to flag it, so even a part of the image is enough to know it was generated by AI.
          • vitorgrs3 hours ago
            Yes, Gemini can actually say how much of the image is AI generated.
    • Tiberium5 hours ago
      I still don't think there's a single GitHub repo that actually removes real SynthID watermarks from Nano Banana 2/NBPro outputs. Most of them are just some research projects that haven't achieved this. The only methods so far I've seen are weird tricks with transparency/overlaying the original image if you're using edits, and also using a diffusion model to regenerate the NB-generated image at low noise levels, but this also modifies the original.
      • vunderba5 hours ago
        Right I think that’s why you probably need to start with very low levels of denoising and experiment with different approaches.

        Set up as a ComfyUI workflow that does a few things: it tries SDXL, Flux, and a couple of different denoising methods at the lowest possible strength (progressively incrementing) to avoid changing the image too much, while also running a SynthID check each time, and repeating this in a loop until the watermark is essentially gone.

        At the same time, you’d probably want to add some kind of threshold based on a perceptual hash aka the maximum perceptual quality difference you’re willing to accept.

    • programd5 hours ago
      Define easily. There is an approach that apparently works and is based on spectral analysis of the images.

      https://github.com/aloshdenny/reverse-SynthID

      • toraway4 hours ago
        FWIW there are a few people in the issues saying that the tool is giving false negatives and the output image gets flagged by the actual Gemini API as having SynthID. Most recently 3 weeks ago without a response.
    • Arnt5 hours ago
      This one was released a few years ago and still seems unbroken. I'm sure it will be broken at some point, but if you have to wait a year or two from when you make a deepfake until you can post it on Facebook, maybe that's enough. Maybe even a month is enough.
    • ZeWaka4 hours ago
      I imagine the technique of having AI recreate the image from scratch based on a very detailed description might work.
      • raincole4 hours ago
        That'd not work with today's technology. No open model's prompt adherence is anywhere remotely close to ChatGPT/NanoBanana. 'remotely' here is a funny understatement, as I don't have a strong enough word in my vocabulary to describe how far the open models are behind the closed ones.

        Writing a more detailed description does not make the models stick to it more.

        • vunderba4 hours ago
          Definitely. I run an entire site built around a series of benchmarks that focus on prompts of increasingly difficult complexity with a focus on adherence, and even the state-of-the-art local models are probably only about thirty percent as good as proprietary models like Gemini 3.1 Flash Image and GPT Image 2.

          Comparing Qwen-Image, Flux.2, ZiT, NB2, and gpt-image-2

          https://genai-showdown.specr.net/?models=qi,nbp3,f2d,g2,zt

  • julianozen5 hours ago
    While these are great, isn’t the problem that malicious actors will create systems that do not use synthID
    • nerdsniper4 hours ago
      It helps significantly in the current moment. A lot of people are lazy and are getting caught quickly by SynthID.

      Eventually it won’t matter when image generation is cheap. But few self-host today and few are willing to pay unsubsidized prices, so the vast majority are using the Gemini, OpenAI, and Midjourney. If all 3 adopted SynthID, only a small fraction would use something else.

      • 4 hours ago
        undefined
      • echelon4 hours ago
        These systems should be removed.

        This is antithetical to freedom and privacy.

        There should be no way for anyone to track down who posted a political meme, anti-religious message, or any other legally protected speech. This will come back to bite us in the ass if we keep building it.

        Soon every image or communication we make will be watermarked if we continue to let this shit seep into the commons. Everything from your phone photos, to your screenshots, to your social media posts.

        One day soon Republicans or Democrats or whoever doesn't like your freedoms will use this tech to identify you and control you.

        There are laws for harms - CSAM, revenge porn, etc. Social media platforms can identify, ban, and report abusers. The framework of the law can take care of the rest.

        Our digital footprint should not be tracked and barcoded.

        • croes2 hours ago
          > There are laws for harms

          These laws need a method to know what is true and what is fake. Good luck with that if you can’t tell if neither images, audio or video are true.

          This fakes will pave the way for fascists.

          How much freedom and privacy will they allow?

        • toraway4 hours ago
          That's a lot of hyperbole, there's no cause/effect relationship I can think of here that could realistically produce your slippery slope.

          Google or anyone else could start adding those unique tracking watermarks you're concerned about any time they want, regardless of whether they use this AI detection watermark, that to be clear can not track you in any way.

          • akersten3 hours ago
            > That's a lot of hyperbole, there's no cause/effect relationship I can think of here that could realistically produce your slippery slope.

            Have you been watching the headlines over the last year? It's like there's a global push towards locked down and verified computing (age verification, TPMs everywhere, Captchas that only work on non-rooted phones, ...).

            You can look out the window and see movement in this direction happening right now. Governments and corporations around the world can't get enough of this shit. Privacy matters, advocating for it is not a "slippery slope."

            > this AI detection watermark [...] that to be clear can not track you in any way.

            Is that clear? We have no idea what metadata they are or aren't embedding in SynthID.

            > Google or anyone else could start adding those unique tracking watermarks you're concerned about any time they want,

            The point is that this is bad and should be denounced!

          • echelon3 hours ago
            I'm not going to mince words - what you're saying is dangerous and harmful.

            > to be clear can not track you in any way

            All they have to do is encode enough entropy for a database unique identifier. Systems like this have been used to do it for audio:

            https://github.com/swesterfeld/audiowmark

            SynthID payloads work the same way, and the paper discusses encoding a "user identifier":

            https://arxiv.org/html/2510.09263v1#S5

            All you need to do is encode a database identifier, GeoIP, or other identifying information, and you've violated a person's privacy without their knowledge or consent.

            Once these systems become popular, the intelligence agencies will "suggest" that Google adds it to their phone cameras. It will start seeping into everything.

            The "slippery slope" is not a fallacy. We're on the verge of having device attestation and identity verification to use the internet. This is so beyond fucked.

            Stop defending this.

            Saying this is okay is EVIL.

            • surgical_firean hour ago
              You are not required to use AI generation for images.

              You can go on living your life without it. I believe in you.

  • rickcarlino4 hours ago
    What if they use advanced evasion techniques like printing it out and scanning it or taking a photo with their phone?
    • Retr0id3 hours ago
      SynthID is fairly resistant to this sort of thing, although not perfect.
  • kube-system5 hours ago
    Is there no way to do this without uploading it?
    • woadwarrior014 hours ago
      I'd built an on-device app for detecting C2PA and IPTC metadata in images, amongst other things. I might be able to add support for SynthID detection once it's been reverse engineered.
    • duskwuff5 hours ago
      Currently, there is not. OpenAI has promised "public verification tooling" down the line, but I'll believe it when I see it.
  • minimaxir5 hours ago
    I'm annoyed that Google is keeping it closed-sourced and limited to partners. Is there a negative externality about open-sourcing image watermark technology so anyone can use it and audit the watermarks independently? If not, then I may have a repository for an open-source invisible and tamper-resistant image watermarking approach that's feature complete...
    • thisisthenewme4 hours ago
      potentially to stop bad actors from poisoning datasets by just adding the filter to real pictures?
    • bsderan hour ago
      The fact that they have to keep this closed source is a giant red flag. It means that you can copy it or strip it if you have the knowledge.

      I'm not all that worried about stripping it (I'm sure that's trivial).

      The problem that I am worried about is that it can be copied (I'd bet $20 that's trivial, too). People WILL put this on images so that they can be "discredited".

    • parhamn5 hours ago
      might be easier to strip it?
  • saberience3 hours ago
    What happens if you generate an image with only a single pixel color or say two colors?
    • akersten3 hours ago
      This was done in the past, Google saw it, and now either refuses to generate or doesn't emit the SynthID watermark for those images
    • userbinatoran hour ago
      You create an image so trivial that no one would care if it was AI-generated or not.
    • SiempreViernes3 hours ago
      You waste a lot of compute on overhead?
  • PunchyHamster5 hours ago
    so ? people wanting to make AI propaganda will just make tool to remove it. Possibly using AI to do it too
    • pta20025 hours ago
      I assume a selfish benefit is that OpenAI and Google don't want the models to train on their own data. There is just /so much/ AI generated content online that they definitely need to filter it out somehow when assembling the training data. This is a pretty effective way to do that, with the nice bonus of being mostly good from a PR standpoint.
      • sgcan hour ago
        I immediately thought that was the real reason. Their models will quickly break without some sort of consensus on how to reliably exclude them.
  • flaxxer5 hours ago
    [dead]
    • bstsb5 hours ago
      always trust a vibe-coded website which uses a Discord bot as its backend

      (i'm sure there are countless bypasses out there, but please don't use something like this)

    • amazingamazing5 hours ago
      You can tell the difference in the example with your bare eyes lol
      • Retr0id3 hours ago
        Why does this matter?