| 发明名称 | Image forming apparatus | ||
| 摘要 | An image forming apparatus includes a measurement unit configured to emit light to a measurement target, and measure reflected light from the measurement target; a white reference plate disposed at a position opposed to the measurement unit; an image forming unit configured to form a measurement image on a sheet; and a calculation unit configured to, based on a measurement value of the white reference plate and a measurement value of the measurement image by the measurement unit, calculate a spectral reflectivity of reflected light from the measurement image. The calculation unit is configured to, after correcting a variation due to color change of the white reference plate with respect to the measurement value of the white reference plate, calculate the spectral reflectivity. | ||
| 申请公布号 | US8948634(B2) | 申请公布日期 | 2015.02.03 |
| 申请号 | US201314038638 | 申请日期 | 2013.09.26 |
| 申请人 | Canon Kabushiki Kaisha | 发明人 | Kamei Yasuo |
| 分类号 | G03G15/00 | 主分类号 | G03G15/00 |
| 代理机构 | Canon USA Inc. IP Division | 代理人 | Canon USA Inc. IP Division |
| 主权项 | 1. An image forming apparatus comprising: a measurement unit configured to emit light to a measurement target, and measure reflected light from the measurement target; a white reference plate disposed at a position opposed to the measurement unit; an image forming unit configured to form a measurement image on a sheet; and a calculation unit configured to, based on a measurement value of the white reference plate and a measurement value of the measurement image by the measurement unit, calculate a spectral reflectivity of reflected light from the measurement image, wherein the calculation unit is configured to, after correcting a variation due to color change of the white reference plate with respect to the measurement value of the white reference plate, calculate the spectral reflectivity. | ||
| 地址 | Tokyo JP | ||