Illustrated Example
The process used to develop the first Random Dot Stereogram is illustrated below.
1. Create an image of suitable size. Fill it with random dots. Duplicate the image.
2. Select a region in one image.
3. Shift this region horizontally by a small amount. The stereogram is complete.
To view the stereogram, focus on a point behind the image by a small amount until the two images "snap" together . Note that viewing the identical images from step 2 in this manner will work, but the whole area will appear at the same depth. The shifted region produces the binocular disparity necessary to give a sensation of depth. Different shifts correspond to different depths. Another way to view it is to focus on a point in front of the images i.e. make "cross eyes" and force the images to snap together having your left eye focused on the right image and your right eye focused on the left image.
Read more about this topic: Random Dot Stereogram
Famous quotes containing the word illustrated:
“We have ourselves to answer for.”
—“Jennie June” Croly 1829–1901, U.S. founder of the woman’s club movement, journalist, author, editor. Demorest’s Illustrated Monthly and Mirror of Fashions, pp. 24-5 (January 1870)
“The barriers of conventionality have been raised so high, and so strangely cemented by long existence, that the only hope of overthrowing them exists in the union of numbers linked together by common opinion and effort ... the united watchword of thousands would strike at the foundation of the false system and annihilate it.”
—Mme. Ellen Louise Demorest 1824–1898, U.S. women’s magazine editor and woman’s club movement pioneer. Demorest’s Illustrated Monthly and Mirror of Fashions, p. 203 (January 1870)