发明授权
US07477422B2 Image recording apparatus, image recording method, method for controlling the image recording apparatus, storage medium storing a program capable of being read by a computer, and image processing method
有权
图像记录装置,图像记录方法,用于控制图像记录装置的方法,存储可由计算机读取的程序的存储介质,以及图像处理方法
- 专利标题: Image recording apparatus, image recording method, method for controlling the image recording apparatus, storage medium storing a program capable of being read by a computer, and image processing method
- 专利标题(中): 图像记录装置,图像记录方法,用于控制图像记录装置的方法,存储可由计算机读取的程序的存储介质,以及图像处理方法
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申请号: US11392684申请日: 2006-03-30
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公开(公告)号: US07477422B2公开(公告)日: 2009-01-13
- 发明人: Yuji Konno , Hisashi Ishikawa , Hiroshi Tajika , Miyuki Fujita , Norihiro Kawatoko , Tetsuya Edamura , Tetsuhiro Maeda
- 申请人: Yuji Konno , Hisashi Ishikawa , Hiroshi Tajika , Miyuki Fujita , Norihiro Kawatoko , Tetsuya Edamura , Tetsuhiro Maeda
- 申请人地址: JP Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JP Tokyo
- 代理机构: Fitzpatrick, Cella, Harper & Scinto
- 优先权: JP1999/159848 19990607; JP1999/162341 19990609; JP1999/285812 19991006; JP2000/109247 20000411; JP2000/109322 20000411
- 主分类号: G06K15/00
- IPC分类号: G06K15/00 ; H04N1/405
摘要:
When recording a gradation pixel by performing pseudo-halftone processing, the occurrence of unevenness in the density in the recorded image is suppressed. For that purpose, when recording a pseudo-halftone image using dot patterns, a dot-pattern table storing a plurality of different dot patterns is provided for each gradation value. One dot-pattern table is selected from N dot-pattern tables based on gradation-value information for each pixel. One dot pattern is selected from the selected dot-pattern table, based on position information indicated by the pixel, and recording is performed using the selected dot pattern. It is thereby possible to prevent the concentrated use of a particular nozzle of a recording head, and suppress the occurrence of unevenness in the density due to characteristics of the specific nozzle.