发明名称 |
Focus detection apparatus, image pickup apparatus, image pickup system, focus detection method, and non-transitory computer-readable storage medium |
摘要 |
A focus detection apparatus performs focus detection by a phase difference method using an image pickup element including first and second pixels, the focus detection apparatus includes a correlation data calculator which calculates correlation data between pixel data obtained from the first pixels and the second pixels in ranges of image data, a detector which detects a saturated pixel having a level of at least a predetermined value in each of the ranges, an adding processor which performs an addition processing of the correlation data calculated in each of the ranges based on a detection result, and a defocus amount calculator which calculates a defocus amount based on a result of the addition processing, and the adding processor performs the addition processing using correlation data obtained from a first range in which the number of the saturated pixels is less than a predetermined number. |
申请公布号 |
US8988595(B2) |
申请公布日期 |
2015.03.24 |
申请号 |
US201314088884 |
申请日期 |
2013.11.25 |
申请人 |
Canon Kabushiki Kaisha |
发明人 |
Kunieda Shutaro;Ogawa Takeshi |
分类号 |
G03B13/00;H04N5/232;H04N5/228;H04N5/359;H04N5/369 |
主分类号 |
G03B13/00 |
代理机构 |
Carter, DeLuca, Farrell & Schmidt, LLP |
代理人 |
Carter, DeLuca, Farrell & Schmidt, LLP |
主权项 |
1. A focus detection apparatus which performs focus detection by a phase difference method using an image pickup element including a plurality of first pixels and a plurality of second pixels, each pair of the first and second pixels sharing one microlens, the focus detection apparatus comprising:
a correlation data calculator configured to calculate correlation data between pixel data obtained from the plurality of first pixels and pixel data obtained from the plurality of second pixels in a plurality of ranges of image data obtained from the image pickup element; a detector configured to detect a saturated pixel having a level of at least a predetermined value in each of the plurality of ranges; an adding processor configured to perform addition processing of the correlation data calculated in each of the plurality of ranges, based on a detection result of the saturated pixel by the detector; and a defocus amount calculator configured to calculate a defocus amount based on a result of the addition processing, wherein the adding processor performs the addition processing using correlation data obtained from the plurality of ranges in which a number of the saturated pixels is less than a predetermined number. |
地址 |
Tokyo JP |