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:
Oct. 13, 1987
Filed:
Apr. 15, 1985
Hirotaka Mizuno, Yokohama, JP;
Fuminobu Komura, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Several properties are assigned to the regions of an image having light and shade and obtained by photographing a surface of an object. Several properties are also assigned to the regions of the picture, which are extracted on the basis of the first proper-assigning operation, and the boundary lines therebetween. The angles of inclination of these regions and the condition of the unevenness of the regions of the surface which are on these boundary lines are estimated by utilizing the relation between the above-mentioned properties and the direction of a light source. Thus, the relative elevation of the surface of the object is determined. The above-mentioned properties are determined with respect to images of the same object from different directions, and the properties thus determined of these images are compared to determine the corresponding points, which are utilized to determine the quantitative elevation of the surface.