Stereograms are pictures that are printed or displayed on 2D surfaces but with a special viewing technique can be visualized in 3D. That includes the technique of combining two images kept side by side to see in 3 D. Here we shall talk about Single Image Stereograms or autostereograms.
The above image has a hidden text in it along with a drawing behind the text. You can view it using the parallel or wall-eyed viewing method.
If you are in India, this paperback book of stereograms will be an excellent gift for a kid.
You should have 2 relatively normal(or corrected with glasses) eyes for stereograms to work.
The trick is to relax your eye muscles so that it focuses beyond the depth of the screen(or printed paper)
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| Practice so that the two black dots on the top become 4 and then merge the middle 2 to get [3 dots] |
Here is a website which will help you to practice that :
http://www.vision3d.com/3views.html
They have various tips and tricks for first timers to get used to parallel-viewing and cross-eyed viewing. Once you get the hang of it once, it should come easily. Like riding a bicycle.
There are also Random Dot Stereograms, Animated Stereograms, ASCII stereograms, and more.
There's also a type of 3D picture called wigglegrams.
| This should be easy - a dog made of blocks - like a minecraft dog |
This is an instructable to make a quick secret ASCII stereogram message.
There's more :




