If you have a fixed position 2D image/video, what are some methods which you can use to make it appear 3D?

Question

This is for a little project I've been thinking about for a while and I think I know the answer, I'm just not sure.

If you have two little tiny screens about an inch or so in front of your eyes (think virtual boy for those who remember it), you can make the image appear 3D if the angles on each image are slightly different and then you project them over each other.

What do you do if you can't change the angle each image is displayed at. When they're projected over each other the angle of sight for each image is the same so it appears 2D.

Would angling the screens, rather than the images on the screens, work to correct this, and if so would the quality suffer? How could I correct any blur or at least make it better?

If you have any other suggestions please let me know. The only requirements are that any extra devices be very small and that minimum blur is achieved.

Answer 1

Take two pictures, one on the right, and one on the left, like your eyes. Use two projectors, and project both images on one screen. On one of the projectors, place a linear polarization filter. On the other place another filter at a right angle to the first. Have the viewer use polarized glasses, aligned to view only one of the images with each eye.

Answer 2

Unfortunately you need the two slightly different images to give you a 3D effect. Simply looking at the same image from slightly different angles with each eye will not work.