The capture of whiteboard images, while required for systems such as ReBoard, is not particularly interesting these days from a research perspective. What’s more interesting (and what’s interesting to us about ReBoard) is how this captured information can be used.
We’ve been using video cameras as network-accessible Axis digital still cameras for ReBoard, and they produce reasonable, but by no means great, images. They work pretty well in our offices, where they can be mounted on the opposite wall, and calibrated to image the whiteboard. We run the captured images through a process that corrects the distortion and extracts the whiteboard region, and then shove the images (both the original and the distorted one) into a database. Works great.
But what happens when the whiteboard moves?