发明授权
US08717630B2 Image processing apparatus and image processing method a thinning ratio applied when an image object has a first size is smaller than a thinning ratio applied when an image object has a second size smaller than the first size
失效
图像处理装置和图像处理方法，当图像对象具有第一尺寸时应用的稀疏比小于当图像对象具有小于第一尺寸的第二尺寸时应用的稀疏比
- 专利标题： Image processing apparatus and image processing method a thinning ratio applied when an image object has a first size is smaller than a thinning ratio applied when an image object has a second size smaller than the first size
- 专利标题（中）： 图像处理装置和图像处理方法，当图像对象具有第一尺寸时应用的稀疏比小于当图像对象具有小于第一尺寸的第二尺寸时应用的稀疏比
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申请号： US12895348申请日： 2010-09-30
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公开(公告)号： US08717630B2公开(公告)日： 2014-05-06
- 发明人: Nobukazu Takahashi , Yasunori Fujimoto
- 申请人： Nobukazu Takahashi , Yasunori Fujimoto
- 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： Canon U.S.A., Inc. IP Division
- 优先权： JP2009-236437 20091013
- 主分类号： H04N1/407
- IPC分类号： H04N1/407
摘要：
If a non-edge part of an image is thinned at a constant thinning ratio regardless of an image size (a character size or a line image width), a reduction in image density in the non-edge part becomes more conspicuous with increasing image size, which can lead to a reduction in image quality. In view of the above, the thinning ratio at which to thin data in the non-edge part of the image is determined depending on the image size. The thinning ratio is set to be smaller for images with sizes greater than or equal to a predetermined value than for images with sizes smaller than the predetermined value such that a high-quality image with sufficiently high density in its non-edge part is obtained regardless of the image size.
公开/授权文献
- US20110085208A1 IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD 公开/授权日：2011-04-14
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