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:
Apr. 07, 2015
Filed:
Sep. 08, 2011
Wakako Yamamoto, Sagamihara, JP;
Kiichiro Takahashi, Yokohama, JP;
Tetsuya Edamura, Inagi, JP;
Toshiyuki Chikuma, Tokyo, JP;
Hirokazu Tanaka, Kawasaki, JP;
Takatoshi Nakano, Yokohama, JP;
Wakako Yamamoto, Sagamihara, JP;
Kiichiro Takahashi, Yokohama, JP;
Tetsuya Edamura, Inagi, JP;
Toshiyuki Chikuma, Tokyo, JP;
Hirokazu Tanaka, Kawasaki, JP;
Takatoshi Nakano, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is provided an image processing apparatus in which in a case of tone-expressing one pixel corresponding to a plurality of areas (printing resolution) in a multi-pass print, it is possible to output a uniform image without graininess or density unevenness over all-tone regions from a low-density region to a high-density region. To this end, by referring to dot patterns in which a print or a non-print of dots onto each pixel (area) corresponding to a printing resolution are in advance defined, quantization data is converted into binary data having the higher printing resolution. At this time, the dot patterns are prepared to be different from each other for M times of scans in a multi-pass print of M passes. In consequence, it is possible to restrict a variation of a coverage ratio due to a printing position displacement in each printing scan.