To provide an automatic focusing device and a focusing method capable of focusing a subject having no high-frequency component in a horizontal direction without increasing a memory capacity or a circuit scale.
A digital video signal output from an A/D conversion circuit 7 is converted into a luminance signal in a luminance signal generation circuit 22. The luminance signal is rearranged so as to be scanned to include at least a part scanned zigzag in a luminance signal rearranging circuit 23. The luminance signal rearranged in the luminance signal rearranging circuit 23 is input in a band pass filter 24 so as to extract a contrast value. An AF evaluated value is arithmetically calculated in a cumulative adding circuit 25 based on the contrast value.
| JP2010009057 | CAMERA |
| WO/2013/047220 | DIGITAL CAMERA |
| JP4859787 | Imaging device and image processing method |
KINDAICHI TAKASHI
| JPH0353210A | 1991-03-07 | |||
| JPH03273770A | 1991-12-04 | |||
| JPH05264891A | 1993-10-15 | |||
| JPH05336431A | 1993-12-17 | |||
| JPS6160081A | 1986-03-27 | |||
| JP2004361611A | 2004-12-24 | |||
| JP2003101867A | 2003-04-04 | |||
| JP2004170510A | 2004-06-17 | |||
| JP2003303564A | 2003-10-24 | |||
| JPH0353676A | 1991-03-07 | |||
| JPH0433480A | 1992-02-04 |
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto