It'd be really cool to see a side by side comparison with, and without Horizon active
Show HN: We put an iPhone on the front wheel of a car
51–60 of 115 posts
Re: Show HN: We put an iPhone on the front wheel of a car
#52Better title: "Show HN: We put an iPhone on the front wheel of a car and drove really slowly for less than 10 seconds at a time"
614 revolutions per minute on the tire, assuming a 17" wheel, is still pretty impressive.
Re: Show HN: We put an iPhone on the front wheel of a car
#53I found this to be really incredible. That is some amazing video stabilization technology. If this app was available for android I think I would use it for every video capture I ever do.
Did you see that it is only stabilizing rotation? If it looks so stable that's because the lens of the iPhone is at the exact center of the wheel. If you were to move your phone along a X or Y axis, I don't think those movements would be stabilized like you could get with a software stabilizer. I guess the main target of this app is people turning their device when shooting a video.
Translation of the camera changes the perspective, i.e., the relative positions of different objects in the image. There is no way a piece of software can get rid of that, because the information isn't there in the first place.
Re: Show HN: We put an iPhone on the front wheel of a car
#54This looks like something that iOS will incorporate as a native feature. When they do this, do they usually buy the technology? Or the entire company?
This would be similar to this acquisition IMO: http://www.macworld.com/article/2083997/apple-acquires-snapp...
Re: Show HN: We put an iPhone on the front wheel of a car
#55Earlier quoted context omitted.
Did you see that it is only stabilizing rotation? If it looks so stable that's because the lens of the iPhone is at the exact center of the wheel. If you were to move your phone along a X or Y axis, I don't think those movements would be stabilized like you could get with a software stabilizer. I guess the main target of this app is people turning their device when shooting a video.
Translation of the camera changes the perspective, i.e., the relative positions of different objects in the image. There is no way a piece of software can get rid of that, because the information isn't there in the first place.
The information is there in sequences of images through parallax precisely when the camera translates. We know how to do 3D reconstruction of scene geometry from a single moving camera.
https://www.youtube.com/watch?v=fLnd9ucUu9Y
Skip to 1:15 to see a textured reconstruction.
The first real-time example was Davison et al's MonoSLAM paper of 2007, I think.
Re: Show HN: We put an iPhone on the front wheel of a car
#56Earlier quoted context omitted.
Developer of the app here. One step ahead of you ;) http://imgur.com/tdnympM
I hope you're joking. If you do plan on doing this then please do it in a suitably strong wire cage, power it on remotely, make sure it is tied down very solidly and make sure nothing you care about (including you, significant others, co-workers, children, pets, possessions etc) is in the plane of rotation because this will fail spectacularly. Keep in mind that if the grinder becomes dislodged or unbalanced that the…
Really great points. I think that when working around power tools it is sometimes forgotten how careful you have to be.
Everyone innately knows certain things like "don't stick fingers in light socket" but other things aren't immediately obvious. Perhaps because you are juxtaposing something like an iphone and maybe are focused on the worse case scenario as being a destroyed iphone (in other words the money issue) instead of the iphone flying off into someones face.
I was watching an episode of "Property Brothers" (a typical renovate a house HGTV type show) and was amazed that they were having the owners participate in demolition without using practically any protective gear (while using crowbars and sledgehammers etc.)
Re: Show HN: We put an iPhone on the front wheel of a car
#57I have some serious sea legs and almost never get motion sickness. The fullscreen youtube vid got me. Great experiment.
Same happened and I didn't even watch full screen.
Maybe this is a way to test those sea bands that I have that I think generally work. But now I do have motion sickness and felt it almost right away.
Re: Show HN: We put an iPhone on the front wheel of a car
#58Kudos to you guys for trying to solve the VVS problem! For your second experiment, may I recommend attaching the iphone to the disc of a variable-speed angle grinder? You'll get a much larger range of speeds, as well as the ability to aim the camera freely. You'll be able to test how your accelerometer algos handle pitch and yaw IN ADDITION to centrifugal force!
Developer of the app here. One step ahead of you ;) http://imgur.com/tdnympM
A box fan might be a safer alternative. It'd give you the ability to move it around but not the high rpm of a angle grinder.
Re: Show HN: We put an iPhone on the front wheel of a car
#59Earlier quoted context omitted.
Developer of the app here. One step ahead of you ;) http://imgur.com/tdnympM
I hope you're joking. If you do plan on doing this then please do it in a suitably strong wire cage, power it on remotely, make sure it is tied down very solidly and make sure nothing you care about (including you, significant others, co-workers, children, pets, possessions etc) is in the plane of rotation because this will fail spectacularly. Keep in mind that if the grinder becomes dislodged or unbalanced that the…
11k RPM is not as fast as you might think. That 660,000 RPH * ~8 inch diamiter circle. So outer edge is 3.14*8inch/12/5280 ~= .0004 miles per revolution or 260MPH. But the center is stationary so actual force is a little less than you can throw it.
Edit: Camera is not centered on the iPhone. So if you center the camera it's worse than that. I would personally not stand anywhere near it.
Re: Show HN: We put an iPhone on the front wheel of a car
#60Earlier quoted context omitted.
I hope you're joking. If you do plan on doing this then please do it in a suitably strong wire cage, power it on remotely, make sure it is tied down very solidly and make sure nothing you care about (including you, significant others, co-workers, children, pets, possessions etc) is in the plane of rotation because this will fail spectacularly. Keep in mind that if the grinder becomes dislodged or unbalanced that the…
Really great points. I think that when working around power tools it is sometimes forgotten how careful you have to be. Everyone innately knows certain things like "don't stick fingers in light socket" but other things aren't immediately obvious. Perhaps because you are juxtaposing something like an iphone and maybe are focused on the worse case scenario as being a destroyed iphone (in other words the money issue) in…
> I was watching an episode of "Property Brothers"
I bet this was just for show.