Live data from Hacker News

An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

badassjs.com

11–20 of 39 posts

Re: An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

#12
post #8
post #3

This is pretty awesome. This is the first time I've seen something being projected into a prism to generate this hologram effect. Is this a new trend?

It looks like it's being reflected off an inverted four-sided hollow (perspex?) pyramid, rather than projected into a prism, but still a neat idea; sort of like the inverse of the (formerly Microsoft) Polycom 360 degree conference camera.[1] I'm curious what it looks like viewed from one of the edges - I can't picture it being seamless? [1] http://www.polycom.com/products-services/products-for-micros...

He moves the camera to another side across the edge in the video- it's far from seamless, it's exactly as you would expect- two images in perspective.

Re: An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

#13

As cool as this is, it's not really a hologram. This is an example of Pepper's Ghost, which is also what's used to project images into your field of vision using Google Glass.

What are the requirements to define something as a hologram?

Re: An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

#15
this is amazing. the future of the interface indeed. forget iron man this is more like star wars. but more seriously, i'm very interested to see what comes next with this in terms of interaction. i'm not sure how long lived the LEAP device will be, but this sort of holographic interaction technology certainly has a big future!

Re: An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

#16
post #14

The following is a fake video of a hologram gaming console. I hope it will inspire someone to make it real: http://www.youtube.com/watch?v=iaaHcH9nQmI

Since we've got the concept, we're 90% of the way there, right? I mean, all that's left is the implementation?

Re: An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

#17

As cool as this is, it's not really a hologram. This is an example of Pepper's Ghost, which is also what's used to project images into your field of vision using Google Glass.

Classic HN, pedantic comments about this not being a hologram.

You know what it is? It's a really cool demo of controlling a perceptually 3D image using a motion controller. Let's have, say, a discussion about the LeapMotion[1] (which is awesome, I have one) or the fact that it's using Javascript (this looks like it is using the packaged WebGL demo[2]).

The LeapMotion is quite nice to use with WebGL / three.js.

[1] https://github.com/leapmotion/leapjs

[2] https://www.leapmotion.com/

Re: An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

#18

this is amazing. the future of the interface indeed. forget iron man this is more like star wars. but more seriously, i'm very interested to see what comes next with this in terms of interaction. i'm not sure how long lived the LEAP device will be, but this sort of holographic interaction technology certainly has a big future!

The device itself is pretty solid, and there are several other companies working on 3D motion detection (such as Intel[1], who has the lofty aim of replacing single webcams with dual webcams.) I think this definitely has a shot at augmenting computer interaction.

[1] http://software.intel.com/sites/default/files/article/325946...

Re: An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

#19
post #13

As cool as this is, it's not really a hologram. This is an example of Pepper's Ghost, which is also what's used to project images into your field of vision using Google Glass.

What are the requirements to define something as a hologram?

I think you need elements of light interference and diffraction for something to be a hologram.

It's essentially a way to "record" light the same way you can record sound in grooves or magnetic tape.

Re: An Iron Man Like 3D Hologram Controlled by Leap Motion and Three.js

#20
post #13

As cool as this is, it's not really a hologram. This is an example of Pepper's Ghost, which is also what's used to project images into your field of vision using Google Glass.

What are the requirements to define something as a hologram?

Holography entails the diffractive reconstruction of the wavefront corresponding to a 3-D scene, and optical holograms are generated using the coherent interference of light scattered from a 3-D scene with that from a second reference beam. Holography, by definition, necessitates scene reconstruction via diffraction. In the case of an electro-holographic display, diffraction patterns corresponding to 3-D scenes are computed and displayed on suitable light modulators to achieve wavefront reconstruction. This technology is still in its infancy, so you probably won't see anything truly holographic in the marketplace for some number of years.

As cool as this demonstration is, it's using a 19th-century technique -- "Pepper's Ghost" -- and cannot correctly be called holographic.

Here's work out of MIT depicting the true state-of-the-art in real-time electroholography: http://web.mit.edu/newsoffice/2011/video-holography-0124.htm....

Post reply on HN