Thread

1. 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. HALtheWise · 1789676405 · focus · HN ↗

      We're talking about a 48MP camera here, so finding a sufficiently "high-resolution monitor" to pull this off is probably more difficult than you expect. Especially because without at least a few times as many pixels as the camera, it's likely that there will be detectable moire patterns in the image. My guess is that a physical print is more fruitful, but it's still a pretty tricky task to get high enough dynamic range and such to truly fool the sensor.

      This sort of concern is presumably why Apple says "Using a neural network with hidden weights, PCC computes a confidence score for the photograph." I'm assuming that things like moire-patterns from pointing the camera at a screen would be caught by that check.

      It's of course physically possible to fool the sensor, but at some point it becomes cheaper to just build a UFO and fly it over the actual Golden Gate Bridge.

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