Today’s advanced smartphone camera setups are capable of much more than snapping scenery or selfies
This new ability is thanks to the addition of a time-of-flight sensor to many new models. The sensor helps a smartphone analyze depth information about a scene that’s being photographed.
It does that by beaming out a laser. The laser bounces off objects and then returns to the sensor, and the phone can then analyze the data that’s been gathered and use it to optimize camera settings.that the laser from the ToF sensor can do more than produce better-looking pictures. It turns out that the intense beam causes abnormal reflections when it hits something like the lens of a camera.
The custom app the researchers developed is able to detect hidden cameras with a success rate near 90%. You’d only be about half that effective if you scanned a room for cameras visually. Commercial detection devices are better, but at about 60% their detection rate is still well below what the research team achieved.
The smartphone and app solution is also very good at avoiding false positives. It’s about half as likely to misreport finding a camera compared to a commercial detection device. OK, this all sounds very cool... like something out of a spy thriller. But why would the average smartphone user ever need to do this, you ask?
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