发明授权
- 专利标题： Document reading apparatus and image processing method
- 专利标题（中）： 文件阅读装置和图像处理方法
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申请号： US11784265申请日： 2007-04-06
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公开(公告)号： US07924476B2公开(公告)日： 2011-04-12
- 发明人: Tomohiko Okada , Shohichi Fukutome , Yasuhiro Suto , Hisashi Yamanaka , Kenji Nakanishi , Mitsuharu Yoshimoto
- 申请人： Tomohiko Okada , Shohichi Fukutome , Yasuhiro Suto , Hisashi Yamanaka , Kenji Nakanishi , Mitsuharu Yoshimoto
- 申请人地址： JP Osaka
- 专利权人： Sharp Kabushiki Kaisha
- 当前专利权人： Sharp Kabushiki Kaisha
- 当前专利权人地址： JP Osaka
- 代理机构： Edwards Angell Palmer & Dodge LLP
- 代理商 David G. Conlin; Catherine J. Toppin
- 优先权： JP2006-105498 20060406
- 主分类号： H04N1/04
- IPC分类号： H04N1/04
摘要：
A document table is provided with a first chart portion and a second chart portion. In each of the first chart portion and the second chart portion, a reference chart is formed. The first chart portion is disposed at an upstream chart position, and the second chart portion is disposed at a downstream-side position located away in a sub-scanning direction from the upstream chart position. On the basis of respective chart images of the first chart portion and second chart portion obtained from respective reference charts of the first and second chart portions read by a document reading portion, the image processing portion obtains respective sharpening levels for respective image areas of a document image of a document read by the document reading portion and, based on the respective sharpening levels, processes the document image.
公开/授权文献
- US20070242319A1 Document reading apparatus and image processing method 公开/授权日：2007-10-18
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