Apple Reference Image: A New Approach for Verified Photography • Hacker News Board

Re: Apple Reference Image: A New Approach for Verified Photography

#361

Post by zimpenfish » Thu, Sep 17, 2026, 11:44 AM UTC

walrus01 wrote: post #37

tristanj wrote: post #3

Apple doesn't address the modified photo replay situation, where you take a picture of an already edited image. Photoshop / AI-gen an image -> display on a high-resolution monitor -> photograph the monitor with iPhone 18 Pro -> valid Apple Reference image. To get valid reference photos, you can go to the actual physical location, put the iPhone/monitor in a cardboard box to block external light, then photograph the m…

> Paint the inside of the box using Vantablack But you're only allowed to do that if your name if Anish Kapoor

Also I think if you're rich enough to be able to coat the inside of a cardboard box with Vantablack, you've probably much easier ways to get misinformation out to the public than photographing a monitor in a cardboard box...

Re: Apple Reference Image: A New Approach for Verified Photography

#362

Post by xandrius » Thu, Sep 17, 2026, 1:39 PM UTC

djtango wrote: post #96

> Modern cameras rely on sophisticated image-processing algorithms to produce the final viewable image, so certifying that an image accurately reflects what a real camera sensor captured requires a chain of trust covering the sensor as well as the computational photography software that interpreted the capture. So if you jailbreak or root your phone what happens? Is this a trojan horse into making rooted phone camera…

Haven't really seen an iPhone jailbreak in over a decade or so?

Re: Apple Reference Image: A New Approach for Verified Photography

#363

Post by astafrig » Thu, Sep 17, 2026, 2:18 PM UTC

tristanj wrote: post #14

pveierland wrote: post #7

Earlier quoted context omitted.

Claim 7 in this patent application describes how depth sensors are used as part of an image authentication process, which would make such a workaround more difficult: https://image-ppubs.uspto.gov/dirsearch-public/print/downloa... The Apple Reference Image feature is here launched on iPhone 18 Pro and iPhone 18 Pro Max that both have built-in LiDAR sensors that could be used for this process.

Apple's current implementation doesn't integrate LiDAR. And LiDAR wouldn't be enough here, it's trivial to block the projector and hide the dot pattern. No dot pattern = iPhone thinks the object is far away, which is what happens in landscape photos. A better fix is to take photos with all three iPhone cameras simultaneously, ideally as a 2-3s video, and use the parallax/multiple perspectives to extract depth informa…

Using the cameras to estimate depth information is not really a better solution than using the LiDAR sensor because the cameras are so close together that the effective range for parallax depth estimation and the effective range of the LiDAR sensor are very similar.