keyframing
Latest
Choreographing a humanoid robot's dance routine is as easy as click and pull
You may not be able to build an HRP-4C fembot in your average garage, but the programming would practically take care of itself -- not only does the AIST humanoid sing using off-the-shelf Yamaha Vocaloid software, its dance moves are click-and-drag, too. Roboticist Dr. Kazuhito Yokoi gave IEEE Spectrum an inside look at the HRP-4C's motion trajectory software, which works much like 3D animation tools: you position the limbs where you want them to start and when you want them to end up using keyframes, and the software takes care of the rest. The system's intelligent enough to generate a 6.7 second sequence from just eight keyframes, and it compensates for hazardous instructions, too -- if your haphazard choreography would tip her over or send limbs flying, it'll automatically adjust her moves. See how it works in a video after the break and hit up our source link for the full interview.
VideoMocap creates 3D animation from any 2D clip (video)
If you've ever used a video editing program, you might be familiar with the concept of "keyframes," which define the beginning and end of a particular segment. Seeing where you came from and where you're going, the computer literally guesses what's in between, and creates smooth animation as a result -- the very same technique that students at Texas A&M University use to create motion capture that doesn't require arrays of cameras or ping-pong balls. Dropping the laws of Newtonian physics into their algorithms, Xiaolin Wei and Jinxiang Chai claim to have whipped up a computer program that can turn most any 2D video into simple 3D animation in real time, with just a few keyframes to start out. For instance, in a complex weightlifting segment 310 frames long where the camera panned, tilted and zoomed, animators had only to position eleven joints in thirteen keyframes (and make seven minute adjustments) to get the entire animation to turn out. See it in action after the break, or read their entire SIGGRAPH paper at our more coverage link.
