Cycle… What is this, 3?… Cycle 3D! Autostereoscopy Lenticular Monitor and Interlacing

One 23″ glasses-free/3D lenticular monitor. I get up to about 13 images at a spread of about 10 to 15 degrees, and a “sweet spot” 2 to 5 or 10 feet (depending  the number of images); the background blurs with more images (this is 7). The head tracking and animation are not running for this demo (the interlacing is radically different from what I was doing with 3 images, and I have not written the patch or made the changes to the animation). The poor contrast is an artifact of the terrible camera, the brightness and contrast are normal, but the resolution on the horizontal axis diminishes with additional images. I still have a few bugs, honestly I hoped the lens would be different, this does not seem to really be designed specifically for a monitor with a pixel pitch of .265 mm (with a slight adjustment to the interlacing, it works just as well on the 24 inch with a pixel pitch of .27 mm). But it works, and it will do what I need.

better, stronger, faster, goosier

No you are not being paranoid, that goose with a tuba is watching you…
So far… It does head tracking and adjusts the interlacing to keep the viewer in the “sweet spot” (like a nintendo 3Dsa, but it is much harder when the viewer is farther away, and the eyes are only 1/2 to 1/10th of a degree apart). The goose recognizes a viewer, greets and follows the position… There is also recognition of sound, number of viewers, speed of motion, leaving, and over volume vs talking, but I have not written the animations for the reaction for each scenario, so it just looks at you as you move around. And the background is from the camera above the monitor, I had 3, so it would be in 3D, and have parallax, but it was more than the computer could handle, so I just made a slightly blurry background several feet back from the monitor. But it still has a live feed, so…

Cycle 2 Demo

The demo in class on Wednesday showed the interface responding to 4 scenarios:

1. No audience presence (displayed “away” on the screen)
2. Single user detected (the goose went through a rough “greet” animation)
3. too much violent movement (the words “scared goose” on the screen)
4. more than a couple audience members (the words “too many humans” on the screen)

The interaction was made in a few days, and honestly, I am surprised it was as accurate and reliable as it was…

The user presence was just a blob output. I used a “Brightness Calculator” with the “Difference” actors to judge the violent movement (the blob velocity was unreliable with my equipment). Detecting “too many humans” was just another “Brightness Calculator”. I tried more complicated actors and patches, but these were the ones that worked in the setting.

Most of what I have been spending my time solving is an issue with interlacing. I hoped I could build something with the lenses I have, order a custom lens (they are only $12 a foot + the price to cut), or create a parallax barrier. Unfortunately, creating a high quality lens does not seem possible with the materials I have (2 of the 8″ X 10″ sample packs from Microlens), and a parallax barrier blocks light exponentially based on the number of viewing angles (2 views blocks 50%, 3 blocks 66%… 10 views blocks 90%). On Sunday I am going to try a patch that blends interlaced pixels to fix the problem with the lines on the screen not lining up with the lenses (it basically blends interlaces to align a non-integral number of pixels with the lines per inch of the lens).

Worse case scenario… A ready to go lenticular monitor is $500, the lens designed to work with a 23″ monitor is $200, and a 23 inch monitor with a pixel pitch of .270 mm is about $130… One way or another, this goose is going to meet the public on 12/07/15…

Links I have found useful are…

Calculate the DPI of a monitor to make a parallax barrier.

https://www.sven.de/dpi/

Specs of the one of the common ACCAD 24″ monitor

http://www.pcworld.com/product/1147344/zr2440w-24-inch-led-lcd-monitor.html

MIT student who made a 24″ lenticular 3D monitor.

http://alumni.media.mit.edu/~mhirsch/byo3d/tutorial/lenticular.html