You can create a stereo pair using graph paper and a pencil. Continue to view the image for approximately ten seconds in this manner, gently adjusting your eyes' focal points, until you begin to see a shape appear in the background this is why many people call it "looking past the picture." Continue to fine tune your focus until your brain registers the 3D image. ![]() If you can't find one readily available, you can find stereograms to view for free at As you look at the image, gently begin to cross your eyes inward, which will cause the single image to appear as two images overlapping each other. Although simple stereographs known as stereo pairs can be constructed by placing an image next to a copy of itself, advanced rendering techniques can create two different images that, when they converge, better trick the brain into thinking it's viewing a 3D picture.įind an autostereogram to practice viewing. ![]() Images on a stereogram are printed so that two parts of an image converge as your eyes cross inward, and your brain is tricked into seeing a 3D image. This will cause a divergence of focal points between your eyes and send two different signals to your brain, creating a double vision effect. Although a well-crafted stereogram takes time to accomplish, there has been an influx of graphic rendering software applications that make designing graphics such as stereograms easy.Ī person views a 3D image popping up from the background of a stereogram by crossing their eyes. While staring at the 2D stereogram, you can detect a hidden image that will appear as a 3D object. ![]() Stereograms, also known as autostereograms, are optical illusions that depict an image within a picture that can be viewed while crossing your eyes. Stereograms create an illusion of 3D depth on a 2D image.
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