The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1979
Filed:
Feb. 26, 1976
Ludwig Leitz, Wetzlar, DE;
Knut Heitmann, Wetzlar, DE;
Eckart Schneider, Wetzlar, DE;
Horst Schmidt, Nauborn, DE;
Ernst Leitz Wetzlar GmbH, Wetzlar, DE;
Abstract
A method and apparatus for the automatic evaluation of stereoscopic images by the determination of the maximum degree of correlation of identical images of an object reproduced by two objectives, for example for a range finder, wherein the two images are superimposed on one and/or two position frequency filters (82, 21, 31, 32) identical in their structures; the respective superimposed signal produced is fed respectively to one photoelectric receiver (13,14,43,44); and the output signals of the photoelectric receivers are used for indicating and/or control purposes. In one embodiment the position frequency filter (82) is moved and the output signals are correlated with each other. In another embodiment the output signals are subtracted from each other.