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. 10, 1986
Filed:
Sep. 27, 1982
Applicant:
Inventors:
Minoru Kanzaki, Yokosuka, JP;
Kazumi Komiya, Yokosuka, JP;
Masaharu Tadauchi, Hitachi, JP;
Kunio Sato, Hitachi, JP;
Kiyohiko Tanno, Katsuta, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06H / ;
U.S. Cl.
CPC ...
382 50 ; 3403 / ; 358282 ;
Abstract
A/D conversion of a video scan signal having a substantially constant shading profile. Waveform of a blank or white scan signal is decomposed into gently varying component and steeply changing component superposed on the former. These components are detected by separately provided A/D converters. The gently varying component can be detected by a low speed A/D converter. By adopting the level of the gently varying component as a reference level, the steeply changing components can be detected with a reduced number of bits at an improved precision.