Stereo Experiment with Anaglyph Images
We just played around a little with some anaglyph animations these days. Actually Jan did all the work and we just watched it together and tried to figure out what works better and what doesn’t. To my surprise the strongest three dimensional effect comes with a big screen and a small camera distance.
In our first test we looked at this video with rain dropping into water. The stereo effect is fine on the water, you barely see any colour problems in the stereo layers and get a good depth. But the drops look red or blue depending on where in the picture you look at. In anaglyph pictures you get the best results with grey colours, so the rain should look great. The problem is the distance of the two cameras, its too big in relation to the distance between rain and cameras.
We tested some more videos but the flight over the forrest was clearly the one which gave the most feeling of being inside the picture. This also proved our first thesis that the stereo effect is better when the cameras are closer together so that the two pictures don’t get shifted too much at any spot.
I had the impression that you see the stereo much better when you can see the border of the image (which Jan always told me was wrong). We looked at the same videos all over again from different angles and distances, the picture was approx. 2 meters wide like you can see in the picture. When you can see the border of the image your brain is quicker in recognising that it’s not a flat picture you’re looking at. The purpose of a stereo effect though is to make you feel that you are inside the scene. And this effect gets lost the clearer you can see the borders of the image.
We proved Jan’s theory that the stereo effect is best when the picture fills all of your view. Besides that the shift of the right and left picture should not be very big to get a good effect. The colours are rather irrelevant because anaglyph kills em anyway.blog comments powered by Disqus