The sensor itself isn't new tech -- in fact, the iPad Pro has lidar, too -- and the same tech is often used in self-driving cars. Here's one party trick I discovered, with the help of MacRumors , and I lay out a few more below. For my first trick, here's how to use the iPhone 12 Pro's camera to measure a person's height in just a couple of seconds I did this with my kids and they loved it.
Point the rear camera at a person who is either standing or sitting and make sure you get their entire body -- from head to toe -- in the frame.
If you’ve updated your iPhone to iOS 14, you can tell when your camera is spying on you
After a second or two, a line will appear above their head with an estimate of their height, including items like their hair or a hat. You can take a picture of the measurement with a tap on the shutter button, saving it to your camera roll. In my testing, the measurement was accurate within half an inch. My son's curly hair caused his first measurement to be just slightly too high, but after he combed it down, it was spot on at 4 feet, 7. I also tested it on myself, and small things like the angle of my head or wearing a hat resulted in the same slightly short 5 foot, 9 inch reading.
When I stood straight up, however, looking directly at the camera without a hat on, it was more accurate, with a 5 foot, 10 inch reading. You can get a rough estimate of more than just a person's height with the Measure app. You can use it to get the dimensions of a piece of furniture, for example, to see if it will fit through a door.
1. Built-In iPhone Camera App
I recently measured a TV to settle a debate on whether it was 55 or 65 inches it was When the Measure app first launched with iOS 12 , I explained how to use it to measure random household objects or figure square footage. With the addition of lidar on Apple devices, the app is getting more accurate. So if you've upgraded your iPhone, it's worth giving the Measure tool another shot. Amen to Prescence!! I applaud the developers of this app and would like to use it and take advantage of their other security devices but there is one major shortfall preventing me from that.
It appears that even with Pro, it isn't possible to set the wait time for recording following motion detection to less than 5 seconds even though 1, 2, 3, and 4 are on the selector, it keeps springing back to 5.
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My driveway is 75' long, but both the UPS guy walking from the road and the lazy cat from next door get almost to my porch before the recording starts. I back down my driveway from the road, all of which is in the camera's sights, but only see the hood of my truck as it disappears beside my house.
All I ever see in these recordings is the tail end of what just happened. This is all with detecting "normal-sized" movements. It would benefit from shorter wait times on motion detection at least in the paid version, although a competitor offers this for free and also a detection grid to limit triggering by things that will never be significant like wind-blown tree limbs also offered by a competitor.
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