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How different is "scaling" an image from "zooming" a browser page? Are they different at all? Because scaling a figure is exactly what Kruger demonstrates in the linked video at 4:30, as the other commenters have pointed out.

Furthermore, it looks like he may be using a touch surface in addition to IR/video cameras, because he can draw strokes on-screen with his finger while his whole silhouette is projected. (A capacitative touchscreen or not, I don't know. Maybe the cameras have good depth perception.) Let's not mince words, "pinching" is equivalent to moving two fingertips together, and "zooming" is scaling.

I also find striking the little crawling/flying sprite his silhouette plays with, starting at 3:34. We're seeing something that should be in a Kinect game, 20+ years before the Kinect. He speaks eloquently about how natural it is for humans to expect behaviours in the real world to translate to the virtual world, when they interact with images on a TV screen.

His exposition is full of so many casually demonstrated possibilities, each of which could probably be patented in our current environment. This guy (probably) didn't - leaving them open to free, public use - and we should be thankful for that.



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