Friday, May 29, 2009

Applets - the geometry of 2 and 3 views

These are insightful applets to introduce the concept of epipolar
geometry of two and three views.

When you press any key, you can drag the 3D point around and sense how
the geometry changes.

Thursday, May 14, 2009

More action in twitter
Because the iphone interfaces to twitter rock. And "twittering" to blogger using gmail — like I'm doing right now — just doesn't sound as cool.


Tuesday, May 12, 2009

2 colors are enough

I posted another video like this a while ago, but I always get amazed at them. I can't help but think how shape and boundaries are enough for vision. I'd like to write up what's the role of the contrast sign in producing these effects. For one, the shadows being black helps a lot. The black traces the robots leave on the street make it look like it is covered in snow. Here is a simple inversion of the video (no sound so you can play them together without interference): Shadows become highlights, and the ground seems to be covered in water instead of snow. It would be cool to have another version of the vid with only the boundaries between the black & white regions.