The idea behind stereoscopic 3D image is to present to each of your eyes a slightly different image. Your brain will (try to) interprete the two images as being two different viewpoints of the same object and deduce the third dimention (depth).

First you need a way to let your eyes see 2 different images.

• The simplest is to use a device which allow you to see different image (this is call a stereoscope).

• You can also place two (small) images side by side and educate your eye to look "behind" the screen as it is the case for autostereogram http://en.wikipedia.org/wiki/Autostereogram

• You can achieve it by colored lenses (this is the case of your sample pic: a blue and a red glass. Through the red glass you can see only the blue image and it looks black and through the blue glass you see only the red image)

• Another way is to have a screen presenting alternativally the right and the left image and glasses which sychronouzly hide one or the other eye.

• You can also use polarized light and discriminate which part of the image goes to each eye with polarized filter

My guess is that in the case of a print (on whatever surface) you are restricted to the side by side images or the colored ones

Having choosen the technic how to produce the images? look through a window: closing an eye you can superpose on the window a drowing to the underlying image, now (without moving the head) switch eye and start again: you have your two image to be combined: of course you may take photography (replacing your eyes with camera) or use computer to project the 3D object on the window plane