What do you think is the best approach to find the 3-D endpoints of a line given two videos shot 90° perpendicular?
Here is what is happening: we're marking a violin bow with el-wire, and shooting a studio performance in order to create a long-exposure video (see vimeo.com/thenightbears/ for more information, and photo, attached).
Since we can do a 2-camera shoot, it seems likely we can extract 3-D data from the videos, and thereby add some openGL love to the project. I'm just a bit stumped as to how to start. I'm assuming I'll need cv.jit to recognize the lines in the first place, and I'm sure there is some handy math that allows two 2-D projections of a line to be converted into 3-D endpoint coordinates, but, please, I need a push in the right direction.
This does not need to be done in real-time; the performance will be recorded in the studio with a click-track, and the final long-exposure-video will be played back in concert. The current patch that creates the basic long-exposure video is very much non-real-time (despite using Gen...).
Many thanks for any advice!