Researchers develop a 360-degree holographic display
Of course, the spinning mirror does look like potentially bad news without the protective case.
Brainwaves of Sken
The why-is-its of a video editor, photographer, designer, convention-runner.
Of course, the spinning mirror does look like potentially bad news without the protective case.
wow
now they mention camera tracking – does that mean the image being projected is only adjusted based on the camera’s position? That would mean it’s not truly a 360 degree hologram… it’s 2D, adjusted based on a single viewing source’s location… technically, you could do that with any flat, projected hologram tracking a camera.
Technically it’s a flat image projected on a flat mirror surface timed to the mirror’s angle and spin rate and camera position…
Still, nifty to look at!
*shakes head* I don’t believe that’s what they mean – I believe they’re simply referring to the camera’s movement.
then what do they mean by “camera tracking”?
ok rewatched, and tracking was only used for vertical motion… so, the projection framerate has to match the cycle frequency of the mirror… each ‘frame’ needs to be projected for each supported viewing angle (1.25 degrees by the video) which is 288 projected angles per frame, or to view 15 frames per second, 4320 projected frames per second (as quoted in the video). Because of the mirror angle, each full frame is composed of any number of projected frames (depending on your distance from the mirror), each representing the object’s appearance to that viewing angle The slow motion section show what an actual ‘view zone’ (multiple frames) looks like. The frame rate is fast enough that the difference between frames for each eye’s viewing angle is essentially ‘blurred’ to produce two viewing angles, thus a 3D image.
So each projected frame represents the image as viewed at each angle, for each 288 angle zones, per rotation (15hz). Parallax is only visible when the viewing angle from left- to right-most bounds for the eye is > 1.25 degrees (ie, if the mirror size to one eye is = 1.25deg, there would be no parallax, but being closer for 12.5deg, the eye would see an image composed of 10 frames – greater difference, greater perceived depth)
So you’re right, the projection is 360 degrees, but without camera tracking it’s only horizontal 3D. To get the vertical angle, the projected image needs to be altered depending on the vertical angle of the viewer.
In looking over all this, it also seems my version’s explanation is based on the mirror image view of a screen, rather than a projected image from a point source, and that would be even more fun to try to visualize :P
I love this stuff.. brings back memories of when I was programming 3D graphics in assembly in high school :)
Wow!
that is smoking hot…
Re: Wow!
You’ve come up amongst a number of people – we should get together soon. :)
Re: Wow!
Hey you got my number, I’ve chatted with a couple of your Lansing friends a few times lately and keep meaning to call you. Maybe you’ll be better at the whole actually calling thing then I have been
It’s nice to see this tech finally getting to the point of being commercially viable. I saw earlier prototypes of this kind of tech locally probably around eight years ago – getting it to the point where it’s clear and polished enough to sell can be a long and arduous path at times.