发明授权
- 专利标题： Image processing apparatus, method of setting tonal gradation conversion characteristics, and computer program
- 专利标题（中）： 图像处理装置，设置色调灰度转换特性的方法和计算机程序
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申请号： US10702170申请日： 2003-11-04
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公开(公告)号： US07324238B2公开(公告)日： 2008-01-29
- 发明人: Hitoshi Inoue
- 申请人： Hitoshi Inoue
- 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., I.P. Division
- 优先权： JP2002-346194 20021128
- 主分类号： H04N1/60
- IPC分类号： H04N1/60 ; G06K9/40
摘要：
Four test patterns are concurrently displayed on a display of a computer. The test patterns include respective backgrounds and contrast areas. The test patterns, different from each other in pixel value, have identically shaped contrast areas. The contrast between the background and the contrast area remains unchanged from test pattern to test pattern. The contrast areas are adjusted in contrast with the pixel value of the background fixed until the test patterns look the same.
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