It was early realized by Exner in 1875 that stereopsis could occur when both eyes together receive the two images of a stereo pair one after the other. Stereopsis occurs even when a void interval is inserted between the presentations of each image.
For instance, Ogle found that stereopsis occurred when two 18 ms presentations were separated by a void interval of 100 ms. Stereopsis has also been studied with protocols in which the two images of a stereo pair were presented cyclically, in alternation to the two eyes. Guilloz - who was motivated by a practical interest in 3d X-ray radioscopy - produced cyclical presentations to the two eyes using a disk rotating in front of a stereoscope lenses. He also described how natural scenes are perceived through his apparatus.
No comments:
Post a Comment