> wait... did anyone catch how he superimposed the powerpoint slide onto the screen/glass/whatever? it's not in the video or the page text.
Yeah, in his construction page, he explains that he uses a video switcher. It's way more complex than it sounds - he's combining feeds from the camera plus a computer into the final output, which is easy enough, but then he needs to be able to see where he's drawing - because that projected image doesn't actually show up on his light board. So he has a monitor on the other side of the light board that he CAN see, but then it produces reflections on the light board, so he starts in with polarizing filters.
And he uses a black background on the Powerpoint slides so that they are superimposed properly and look like they are in the same space as the board. Plus, he can then still use the fluorescent markers to "draw" on his slides from the glass-board.
Yeah, in his construction page, he explains that he uses a video switcher. It's way more complex than it sounds - he's combining feeds from the camera plus a computer into the final output, which is easy enough, but then he needs to be able to see where he's drawing - because that projected image doesn't actually show up on his light board. So he has a monitor on the other side of the light board that he CAN see, but then it produces reflections on the light board, so he starts in with polarizing filters.
https://sites.google.com/site/northwesternlightboard/home/el...