| 发明名称 | Image sensing apparatus, exposure control method and recording medium | ||
| 摘要 | An image sensing apparatus obtains the weighted average luminance of an image sensing target that puts weight on a main subject in an obtained luminance distribution of the image sensing target. The image sensing apparatus decides exposure control values based on the average luminance of a region that is lower than the weighted average luminance, out of regions each of a predetermined size contained in the image sensing target, and the weighted average luminance. | ||
| 申请公布号 | US9137450(B2) | 申请公布日期 | 2015.09.15 |
| 申请号 | US201313850730 | 申请日期 | 2013.03.26 |
| 申请人 | CANON KABUSHIKI KAISHA | 发明人 | Osawa Toshifumi |
| 分类号 | H04N5/235;G03B7/00;H04N5/238;H04N5/222 | 主分类号 | H04N5/235 |
| 代理机构 | Cowan, Liebowitz & Latman, P.C. | 代理人 | Cowan, Liebowitz & Latman, P.C. |
| 主权项 | 1. An image sensing apparatus comprising: an obtaining unit configured to obtain information about a luminance distribution of an image sensing target; a weighted average unit configured to obtain a weighted average luminance of the image sensing target, that puts weight on a main subject, from the information about the luminance distribution of the image sensing target obtained by said obtaining unit; and a decision unit configured to decide an exposure control value based on an average luminance of a region that is lower than the weighted average luminance, out of regions each of a predetermined size contained in the image sensing target, and the weighted average luminance, wherein said decision unit decides the exposure control value based on the average luminance of the region having a lowest average luminance, out of the regions each of the predetermined size contained in the image sensing target, and the weighted average luminance. | ||
| 地址 | Tokyo JP | ||