发明名称 |
IMAGE FORMING APPARATUS, IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND RECORDING MEDIUM |
摘要 |
The present invention provides a mechanism that more appropriately evaluates an image defect caused by a specific process in an image forming apparatus. An image forming apparatus of this invention performs colorimetry of a patch image at a spatial resolution corresponding to the spatial frequency of color unevenness caused by a specific process included in an image forming process. A statistic value based on the n-th (n is an integer of 2 or more) order central moment of a specific color component of a colorimetric value obtained by performing colorimetry at the spatial resolution is compared with a reference value, thereby detecting that the color unevenness caused by the specific process has occurred in the patch image.
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申请公布号 |
US2012154832(A1) |
申请公布日期 |
2012.06.21 |
申请号 |
US201113302263 |
申请日期 |
2011.11.22 |
申请人 |
YOKOYAMA KEN;SONODA AKIHITO;CANON KABUSHIKI KAISHA |
发明人 |
YOKOYAMA KEN;SONODA AKIHITO |
分类号 |
H04N1/60 |
主分类号 |
H04N1/60 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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