Put your face close to the screen and cross your eyes until the two images above become one. You may need to adjust the tilt of your chin to make it happen, but when they come together you’ll see [John Lennon] pop out in 3D. This was made using a 3D rendering script for The Gimp.
The process is not entirely automatic, but it won’t take too long to mask off the outlines for different depth layers. The script makes three different layers from the image. One of them is a color-coded depth map that uses a custom color palatte to choose distance for each item. If you paint the background dark blue it will be processed at the furthest distance from the viewer’s cross-eyed perspective, yellow is the nearest.
[Don] mentions a parallel output and a cross-eyed output in his write up. We understand the cross-eyed version, but are just guessing that the parallel version would be used in a stereoscopic viewer that puts a partition between the two images so that each eye sees a different frame. You know, like a View-Master.
People spend years of their lives practicing on the courts to get the kind of accuracy that this robot achieves. It is able to shoot freethrows thanks to stereoscopic camera analysis of the target. We know what you’re thinking; big deal, it knows the distances which makes the calculations easy. That’s not the case, look a bit closer in the image above. The basket itself is mounted on a robotic platform and creates a randomly moving target. It looks like shots are only taken when the basket is stationary. But still, that means the system is able to calculate accurate throws when the basket is not only at varying distances, but also when it is not directly in front and not square to the arm of the robot. The accuracy relies on analyzing the square on the backboard of the basket. Because two cameras give different perspectives, edge and corner detection of both images allow the system to extrapolate the location of the target.
After the fold there’s a video of this robot being demonstrated to the public. Apparently the yellow-armed-monster isn’t suitable for public consumption because the developers have covered it with the body of a plush seal.
Continue reading “This Robot Will School You At Freethrows”
[ProfHankD] came up with a pretty easy way to take 3D photos using a single lens. He’s making Anaglyph images which use color filtering glasses to produce stereoscopic 3D effects. We’ve seen stereoscopic imaging hacks that use two cameras or a clever combination of mirrors, but this one uses a special filter and post-processing. [ProfHankD] drew up a template that can be used to properly align two colored filters, like those in the lens cap seen above. Once installed, just snap all the pictures you want and then hit them with your favorite photo editing software. This involves separating the color channels of the photograph and offsetting them to increase the depth of focus.
It’s a nice little process, and his writeup is easy to understand even if you’re not a hardcore photography guru.
[courtervideo] shares an instructible with us on how to build a mirror rig to take stereoscopic pictures with one camera. We’ve had the thought “couldn’t you just do that with some mirrors?” when looking at a dual camera rig. Well, as we all suspected, you can. There are some advantages here, a single click gives you your 3d image or video without any post processing, and unless you just happen to have an extra camera lying around you can save money there. You do however lose some resolution compared to two separate cameras. This setup could actually add some steps if you were wanting to interlace your images for viewing on a 3d tv.
Who could forget the stereoscopic goodness of a View-Master? [Tuttle] put a modern flair on the classic optical device by adding two 1.5″ LCD screens. The screens replace the film disk of the original, showing slightly different images to produce a 3D effect. No word on a camera rig used to take the original images, but for our money this a great way to make something out of those useless key chain picture frames.
There have been a couple companies that have shown off full-sized 3D displays, but Fujifilm had a couple of products that caught my eye. The first was a stereoscopic camera called the Finepix Real 3D W1 that not only functioned as a 3D Camera, but also featured a glasses-free 3D display on the back. The camera was capable of using the separate cameras in different functions, allowing you to zoom one in, and take a wide angle with the other simultaneously.
They featured a miniature 3D display as well, which was the size of a regular digital photo frame but contained the same technology as the camera screen. As far as getting into hacking a 3D display, this would be a good place to start, though the ~$400 price might be a bit of a put off.
[Pyrofer] sent in his stereoscopic game project and we are just giddy with excitement. He has hacked apart an old TomyTronic 3D handheld viewer and put new guts in. He’s using a PIC micro to push stereoscopic imagery to twin LCDs. He wrote all code from scratch including the 3d library, wii nunchuck driver, and LCD driver. This thing even has bluetooth so he can play multiplayer if he ever makes a second one. The whole unit is kept alive via a lithium polymer battery so you don’t have to worry about any cords other than the wii nunchuck. This thing is awesome, we would love to play with one. You can see a video after the break.
Continue reading “Stereoscopic 3d With A PIC Micro”