THE VISILOG: A SYNTHETIC EYE.
Technical documentary rept. for 1 Jul 63-29 Feb 64,
GENERAL ELECTRIC CO ITHACA N Y ADVANCED ELECTRONICS CENTER
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The VISILOG is an automatic obstacle avoidance machine whose principle of operation is based upon the analog of the visual senses. The subject of this investigation was a stationary slant-perceiving VISILOG, where the slant of a surface is measured by use of the texture density gradient as observed in the retinal plane. Texture density gradients may be measured by scanning a retinal plane image to determine the number of texture elements in a given scan and comparing the values for the near field and far field scans. Projected artificial textures which eliminate the emergent texture problem are analyzed as a method for extracting surface slant from the observed retinal plane patterns. Several VISILOG configurations are examined from the equipment point of view and the advantages and disadvantages of each are considered. Experimental verification of the VISILOG method of measuring surface slant is obtained and the effects of stochastic surfaces upon measurement accuracies demonstrated. The results obtained on this program indicate that the stationary slant measurement VISILOG is useful only in limited environmental situations.