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:
Jun. 25, 1985
Filed:
Aug. 06, 1982
Toshiyuki Sakai, Nasahara-Motomachi, Takatsuki-shi, Ohsaka-fu, JP;
Yuichi Ohta, Takatsuki-shi, Ohsaka-fu, JP;
Michihiko Minoh, Minami-ku, Kyoto-shi, Kyoto-fu, JP;
Masatoshi Hino, Kubo, Onomichi-shi, Hiroshima-ken, JP;
Other;
Abstract
A system for converting an analog image signal into a digital image signal is provided. The system comprises an analog-to-digital signal converter for producing a digital signal by subjecting an incoming analog signal to threshold processing with a threshold level. The system also comprises a peak/valley extracting circuit for extracting peak and valley points corresponding to thin lines and narrow gaps between lines, respectively, in the original image scanned. The extracted peak and valley points are utilized in the analog-to-digital conversion processing so as not to lose information as to thin lines and narrow gaps between lines. Especially, in extracting peak and valley points, the concentration or level of a particular picture element is compared with that of the adjacent picture elements at least in two directions.