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:
Sep. 12, 2000
Filed:
Feb. 04, 1997
Applicant:
Inventors:
Naoji Ohtsuka, Yokohama, JP;
Atsushi Arai, Kawasaki, JP;
Kentaro Yano, Yokohama, JP;
Kiichiro Takahashi, Kawasaki, JP;
Osamu Iwasaki, Tokyo, JP;
Daigoro Kanematsu, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06T / ;
U.S. Cl.
CPC ...
345434 ;
Abstract
An image processing method and apparatus which prestore a mask pattern generated using a pseudo-random number in a ROM within the apparatus, and perform image data conversion using the mask pattern. This avoids overlap between the pixel pattern of the image data and the mask pattern in a large area, and conserves the respective color densities. Accordingly, the method and apparatus enable image processing conserving the color hue and tonality of the original image data.