That’s not how they work. They emit structured light in the form of an array of infrared dots and they measure the time of flight to where the dots strike something.

Maybe new ones are different but that’s how they used to be. Little Kinect devices, really, for sensing faces instead of whole people.

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fortran77 4 hours ago | parent [-]

You are exactly right. There's a description here:

https://learn.microsoft.com/en-us/windows-hardware/design/de...

These cameras are considered a "secure biometric" device and AFAIK nobody has faked them. I've flagged the poster who said "try two flat images"

	▲	stavros 4 hours ago \| parent \| next [-]
		You don't need to flag people who make a mistake.
	▲	nandomrumber an hour ago \| parent \| prev \| next [-]
		Did you report your neighbours for skirting covid rules to?
	▲	usefulposter 38 minutes ago \| parent \| prev [-]
		>I've flagged the poster who said "try two flat images" Hello there! It appears you are misapplying the flagging system. While the suggestion may be incorrect, it is not an "egregious comment". In addition, your comment doesn't follow the Hacker News Guidelines: https://news.ycombinator.com/newsguidelines.html Don't feed egregious comments by replying; flag them instead. If you flag, please don't also comment that you did. Have a great day!