| Author | Message | ||
     stevefzr Rating: N/A |
I'm still struggling with drivers (I assume) and my cyber3dvisor glasses, but that's already a topic of another thread. I've managed to get them working to some extent, and generated a few 3d images. Here's some notes on how I did it from someone who's never tried it before. First, I seem to recal that you should shoot stereo pairs by aiming your camera at the centre of interest, taking the first shot, moving the camera sideways about 1/30th of the distance to the objext (so if the object you were pointing at is 30 feet away, you'd move the camera sideways 1 ft) make sure it's still pointing at the same object and take the second shot. In effect, you're not moving the camera sideways, but in an arc with the centre wing your object of interest. I know that you can increase or decrease the 1/30 ratio, but beyond a certain point you'll no longer be able to resolve stereo. To give me lots of pictures to play around with, I grabbed my Canon MV-1 mini DV camera. Sold as an optura I think in the states). This has a progressive scan mode, so it effectively captures 25 640x480 still a second when videoing. 25fps because mines a PAL camera, not NTSC. I then picked a subject, started recording and slowly moved to the right in an arc, keeping the subject in the middle of the frame. I then downloaded the video via my firewire card and captured about every third frame as a still. Each was named with a sequence number, 1,2,3... etc, after it. I then stated 3dpix and opened sequence number 1 as my left image. I then opened seq 2, seq3, seq4 etc in turn as the right image. Each had a little more "lens" separation than the previous. When I found the optimal image to match seq1, I saved it as a stereo pair. 3dpix is a REALLY great product (if only my pc didn't crash every time I used it, but hopefully I'll sort that out). I didn't take any measurements, but it looks like the 1/30 ratio generally provided the best matching image. Now that I've got the technology working, I can start shooting some hi-res shots. I'll drop a not in here when I get some published on the net. Steve |
