Title:
画像処理装置
Document Type and Number:
Japanese Patent JP4916059
Kind Code:
B2
Abstract:
In an apparatus for performing printing using a color ink-jet head having a plurality of ink-discharge-port strings corresponding to ink materials having different color tones, a high-quality image having excellent gradation can be recorded, while reducing the cost of the apparatus and increasing the data processing speed by reducing the capacity of a memory for storing dot arrangement patterns. For that purpose, as a plurality of dot arrangement patterns for determining dot arrangement at output within a MxN-dot region for one input pixel, (1) patterns having a large number of gradation levels that can be represented (for example, nine gradation levels) and a high recording resolution (for example, 1,200 dpi (dots per inch)x2,400 dpi) are used for colors in which uneven stripes tend to be pronouncedly observed (for example, light cyan and light magenta), and (2) patterns having a small number of gradation levels that can be represented (for example, five gradation levels) and a low recording resolution (for example, 1,200 dpix1,200 dpi) are used for colors in which uneven stripes tend to be less pronouncedly observed (for example, black, cyan, magenta and yellow).
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Inventors:
Takayuki Ogasawara
Tetsuhiro Maeda
Yuji Konno
Norihiro Kawadoko
Tetsuya Edamura
Mitsuhiko Masuyama
Hiroshi Taka
Tetsuhiro Maeda
Yuji Konno
Norihiro Kawadoko
Tetsuya Edamura
Mitsuhiko Masuyama
Hiroshi Taka
Application Number:
JP2001232920A
Publication Date:
April 11, 2012
Filing Date:
July 31, 2001
Export Citation:
Assignee:
Canon Inc
International Classes:
B41J2/205; G03F3/08; G06K15/10; H04N1/23; H04N1/46
Domestic Patent References:
| JP1067127A | ||||
| JP9286122A | ||||
| JP9286124A | ||||
| JP392366A | ||||
| JP3207164A | ||||
| JP3221475A |
Foreign References:
| US20020080394 |
Attorney, Agent or Firm:
Patent Business Corporation Tani/Abe Patent Office
Yoshikazu Tani
Kazuo Abe
Yoshikazu Tani
Kazuo Abe