Thread

Apple Reference Image: A New Approach for Verified Photography

539 points · 352 comments · imwally

tristanj · 1789527436 · focus · HN ↗
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 monitor. Paint the inside of the box using Vantablack (stopping reflections) and cover the LiDAR projector with tape.
I can't wait to see Apple Verified™ photos of UFOs flying over the Golden Gate Bridge.
1. pveierland · 1789528538 · focus · HN ↗
  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:
  <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20260268025" rel="nofollow">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.
  1. tristanj · 1789529371 · focus · HN ↗
    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 information. The video files (Possibly audio too) could also be included with the verified image as additional verification.
    They can also prevent photos if iPhone detects the LiDAR sensor is covered, similar to how Meta does it with their camera glasses.
    dylan604 · 1789535418 · focus · HN ↗
    > 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.
    I've never looked at the LiDAR hardware, but where is the emitter in relation to the receiver. Why would the LiDAR not reflect off of whatever you're blocking it with and return a very short flight meaning it was very close?
    jojobas · 1789537149 · focus · HN ↗
    Paint the stopper vantablack then.
    testdelacc1 · 1789539833 · focus · HN ↗
    I knew keeping a pot of vantablack in my jacket pocket would come in handy.
    mitxela · 1789552949 · focus · HN ↗
    I think the plan is to block the emitter, not the emitter and the receiver together

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