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:
Jul. 30, 1991
Filed:
Aug. 19, 1988
Yoshihiko Iida, Chiba, JP;
Mitsuru Ikeda, Chiba, JP;
Ken Ishikawa, Chiba, JP;
Isao Horiba, Aichi, JP;
Hitachi Medical Corporation, Tokyo, JP;
Abstract
In a picture image reading system having a scanning system for scanning the surface of a picture image medium with light beams, an optical system for condensing the light beams transmitted through or reflected from the picture image medium and dividing the light beam into a plurality of light beams, and a plurality of density readers respectively responsive to the plurality of light beam where each density reader reads a predetermined ranges of density signals different from the ranges read by the remaining density readers, the improvement comprising a device for so establishing the density signal ranges read by the readers that adjacent density signal ranges partially overlap one another; a detecting device responsive to the density signals from the plurality of readers for detecting density signals occurring in overlapping portions where the density signal ranges of adjacent readers overlap and providing an overlap signal indicative of the occurrence; and a synthesizing device responsive to the density signals read from the plurality of readers and the overlap signal for connecting the density signals from the plurality of readers to synthesize a composite density signal corresponding to the entire density range of the picture.