发明名称 |
DIRTY LENS DETECTION DEVICE AND DIRTY LENS DETECTION METHOD |
摘要 |
It is possible to consider an image as a composite wave that is the result of layering waves having differing periods and amplitudes. An image captured via a lens having a water droplet attached thereto has a higher occurrence of changes such as image blur than an image that does not have a water droplet attached thereto, which means that this type of change in an image results in changes in the composite wave thereof as well. Provided is a lens dirtiness detection device that suitably determines whether a lens is dirty without being affected by a background image by: focusing on the occurrence of large changes in the composite wave of an image that accompany an increase in the dirtiness of a camera lens; extracting each of the image frequency components that constitute the composite wave; and analyzing changes in the magnitude relation between the frequency components. |
申请公布号 |
EP3026885(A1) |
申请公布日期 |
2016.06.01 |
申请号 |
EP20140828669 |
申请日期 |
2014.06.05 |
申请人 |
CLARION CO., LTD. |
发明人 |
AKIYAMA, YASUHIRO;NAKAMURA, KATSUYUKI;IRIE, KOTA |
分类号 |
H04N5/217 |
主分类号 |
H04N5/217 |
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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