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:
Jan. 26, 1993
Filed:
Mar. 04, 1991
Masato Suzuki, Ibaraki, JP;
Hiromi Inaba, Katsuta, JP;
Hiroshi Takenaga, Ibaraki, JP;
Masachika Yamazaki, Katsuta, JP;
Naoto Oonuma, Hitachi, JP;
Kiyoshi Nakamura, Katsuta, JP;
Yoshio Sakai, Ibaraki, JP;
Kenji Yoneda, Katsuta, JP;
Naofumi Nakata, Katsuta, JP;
Syoji Kasai, Katsuta, JP;
Hitachi, Ltd., Chiyoda, JP;
Abstract
An image of an elevator hall or an inside of elevator car is acquired by photographing apparatus, and the number of waiting passenger is detected by comparing the above-mentioned image with a background image when no passenger is present at the elevator hall. Second image processing apparatus with high precision is prepared by the same image information as that of first image processing apparatus, teacher information derived therefrom is compared with an output from the first image processing apparatus. If the teacher information is not coincident with the output from the first image processing means, parameters required for performing the image process by the first image processing appartus, for instance, constants, threshold values and weight coefficients employed in an image processing algorithm are adjusted.