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:
Mar. 02, 1993
Filed:
May. 28, 1991
Applicant:
Inventors:
Masaki Harada, Hirakata, JP;
Hiroshi Kano, Hirakata, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358455 ; 358458 ;
Abstract
A method of converting gradation of a digital image data so as to reduce the number of gradation, a circuit thereof, a print density controlling apparatus for a printer and a printer using the method, in which the number of gradation being converted into one gradation is set smaller for the portion of low gradation of the original data than for the portion of high gradation thereof, so that the gradation of the low-gradation portion is smoothly varied visually in the image after gradation conversion.