WORLD TRADE CENTER RUINS, VETERAN'S DAY, 2001
The Images below showing the remains of the facade of Tower 1, the North Tower of the World Trade Center, a few weeks before it was demolished, are also intended to be the first experiment in the display of stereo-pair images to convey 3-D on the Web. They are presented in two ways, to enable viewing in which ever way works for different individuals. (1) Eyes-parallel, and (2) Eyes-crossed (wherein by the left hand image is placed on the right.)
(1) Eyes-parallel viewing - INSTRUCTIONS: These two images are placed as they would be in a 19th Century stereopticon viewer. To view them in 3-D, one must relax the eyes and look at them as one would an object at a distance, so that the two images overlap when the eyes move parallel. This takes practice, but it gives the most realistic sense of a 3 dimension view in the distance. If you have trouble, try holding a piece of cardboard extending from between the photos to between your eyes to help force each eye to look at the image on the same side of the cardboard. It is easier if a strong pair of reading glasses are used. The disadvantage on a computer screen is that the resolution of the image is less than the version below because their centers cannot be more than a pupil-distance apart.
(2) Eyes-crossed viewing - INSTRUCTIONS: To view this in 3-D, you must cross your eyes until the images overlap, and then they should pop into focus and 3D. This is easier for most people to accomplish without a viewer than eyes-parallel, and on the computer screen is produces the higher resolution because the images are not restricted in size by the pupil-distance, but the resulting 3-D is close up and model-like.
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© Randolph Langenbach
M-Arch (Harvard), Dipl.Conservation (York, England)
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