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:
Jan. 11, 1994
Filed:
Oct. 04, 1991
Applicant:
Inventors:
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358456 ; 358458 ; 358459 ; 358465 ;
Abstract
An image processing apparatus in which, when a multi-tone image is printed by using an error diffusion technique, error data to be diffused is modified so that the tone level of the image data as printed varies linearly with variation of an input image data. A printed dot of a pixel has a larger area than that of the theoretical pixel so that the dot juts out into adjacent pixels. The error data to be diffused is modified in consideration of jut-out dot areas of adjacent pixels, so as to obtain a linear variation of the tone-level with variation of the input image data.