JP2018117283A - 画像処理装置及び画像処理方法 - Google Patents
画像処理装置及び画像処理方法 Download PDFInfo
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- JP2018117283A JP2018117283A JP2017007625A JP2017007625A JP2018117283A JP 2018117283 A JP2018117283 A JP 2018117283A JP 2017007625 A JP2017007625 A JP 2017007625A JP 2017007625 A JP2017007625 A JP 2017007625A JP 2018117283 A JP2018117283 A JP 2018117283A
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- image
- unevenness correction
- plane unevenness
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/58—Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/50—Picture reproducers
- H04N1/506—Reproducing the colour component signals picture-sequentially, e.g. with reproducing heads spaced apart from one another in the subscanning direction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/409—Edge or detail enhancement; Noise or error suppression
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/52—Circuits or arrangements for halftone screening
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/60—Colour correction or control
- H04N1/6016—Conversion to subtractive colour signals
- H04N1/6022—Generating a fourth subtractive colour signal, e.g. under colour removal, black masking
- H04N1/6025—Generating a fourth subtractive colour signal, e.g. under colour removal, black masking using look-up tables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/60—Colour correction or control
- H04N1/6072—Colour correction or control adapting to different types of images, e.g. characters, graphs, black and white image portions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/0077—Types of the still picture apparatus
- H04N2201/0094—Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Color, Gradation (AREA)
- Image Processing (AREA)
Abstract
Description
Claims (5)
- 画像形成対象の画像データのエッジ部分を検出することでエッジ情報を生成するエッジ判定部と、
入力値に対応する出力値が記憶される面内ムラ補正テーブルと前記エッジ情報とに基づいて前記画像データの出力値を決定する面内ムラ補正処理部と、
を備える画像処理装置。 - 前記面内ムラ補正処理部は前記入力値がエッジ部分の場合、前記入力値をそのままの値又は前記入力値に近い値を出力値とする、
請求項1に記載の画像処理装置。 - 前記画像読取部が主走査方向に階調パッチ画像が複数配置されたテスト画像を読み取ると、
前記テスト画像に基づいて前記面内ムラ補正テーブルを生成する面内ムラ補正テーブル生成部をさらに備える、
請求項1又は2に記載の画像処理装置。 - 前記エッジ判定部はエッジ画素の延びる方向に対して直行する画素が所定の条件を満たす場合前記前記画素を細線と判定する、
請求項1から3のいずれか1項に記載の画像処理装置。 - 画像形成対象の画像データのエッジ部分を検出することでエッジ情報を生成するエッジ判定ステップと、
入力値に対応する出力値が記憶される面内ムラ補正テーブルと前記エッジ情報とに基づいて前記画像データの出力値を決定する面内ムラ補正処理ステップと、
を備える画像処理装置が実行する画像処理方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017007625A JP6806574B2 (ja) | 2017-01-19 | 2017-01-19 | 画像処理装置及び画像処理方法 |
US15/641,954 US10178278B2 (en) | 2017-01-19 | 2017-07-05 | Image forming apparatus that applies correction selectively to a subset of pixels |
CN201711135245.5A CN108337400B (zh) | 2017-01-19 | 2017-11-15 | 图像处理装置及图像处理方法 |
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JP2017007625A JP6806574B2 (ja) | 2017-01-19 | 2017-01-19 | 画像処理装置及び画像処理方法 |
Publications (2)
Publication Number | Publication Date |
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JP2018117283A true JP2018117283A (ja) | 2018-07-26 |
JP6806574B2 JP6806574B2 (ja) | 2021-01-06 |
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JP2017007625A Active JP6806574B2 (ja) | 2017-01-19 | 2017-01-19 | 画像処理装置及び画像処理方法 |
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US (1) | US10178278B2 (ja) |
JP (1) | JP6806574B2 (ja) |
CN (1) | CN108337400B (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11575803B1 (en) | 2022-02-10 | 2023-02-07 | Toshiba Tec Kabushiki Kaisha | Image forming apparatus and method correcting density unevenness for each divided region in a main scanning direction |
US11710016B1 (en) * | 2022-02-10 | 2023-07-25 | Toshiba Tec Kabushiki Kaisha | Image forming apparatus |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1874894B (zh) * | 2003-10-31 | 2011-03-02 | 精工爱普生株式会社 | 打印方法、打印设备、打印系统 |
JP2005246938A (ja) * | 2004-03-08 | 2005-09-15 | Seiko Epson Corp | 印刷装置、コンピュータプログラム、印刷システム、及び、印刷方法 |
US7710609B2 (en) * | 2005-05-24 | 2010-05-04 | Xerox Corporation | Page edge correction systems and methods |
JP2007129448A (ja) | 2005-11-02 | 2007-05-24 | Canon Inc | 画像処理システム |
JP2007210183A (ja) * | 2006-02-09 | 2007-08-23 | Ricoh Co Ltd | 画像形成装置及びその制御方法 |
JP4410219B2 (ja) | 2006-06-05 | 2010-02-03 | コニカミノルタビジネステクノロジーズ株式会社 | 画像形成装置および画像形成方法 |
JP5147597B2 (ja) * | 2008-08-13 | 2013-02-20 | キヤノン株式会社 | 画像形成装置、画像形成方法およびプログラム |
JP6191199B2 (ja) * | 2013-03-29 | 2017-09-06 | ブラザー工業株式会社 | 画像処理装置、画像処理装置の制御方法、及び画像処理装置の制御プログラム |
JP5975576B2 (ja) * | 2013-12-02 | 2016-08-23 | 富士フイルム株式会社 | 画像形成装置及び画像形成方法 |
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2017
- 2017-01-19 JP JP2017007625A patent/JP6806574B2/ja active Active
- 2017-07-05 US US15/641,954 patent/US10178278B2/en active Active
- 2017-11-15 CN CN201711135245.5A patent/CN108337400B/zh active Active
Also Published As
Publication number | Publication date |
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US20180205853A1 (en) | 2018-07-19 |
CN108337400A (zh) | 2018-07-27 |
JP6806574B2 (ja) | 2021-01-06 |
CN108337400B (zh) | 2022-01-21 |
US10178278B2 (en) | 2019-01-08 |
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