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:
May. 11, 1993
Filed:
Apr. 18, 1991
Applicant:
Inventors:
Masaaki Kanashiki, Yokohama, JP;
Nobuo Minoura, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358169 ; 358166 ; 358174 ;
Abstract
The present invention relates to an apparatus by which, in the image display corresponding to a image signal, image signal is processed to adjust the contrast of the picture so as to provide automatically the contrast adjustment most suitable for respective level of image signal, thereby improving the quality of the picture by regulating the level of the image signal according to the information showing the distribution status of the levels of image signals input during a specified period of time.