Invention Grant
- Patent Title: Image-pickup apparatus and focus control method
- Patent Title (中): 摄像装置和对焦控制方法
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Application No.: US11778243Application Date: 2007-07-16
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Publication No.: US07773873B2Publication Date: 2010-08-10
- Inventor: Kazunori Ishii
- Applicant: Kazunori Ishii
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Cowan, Liebowitz & Latman, P.C.
- Priority: JP2006-201998 20060725
- Main IPC: G03B3/00
- IPC: G03B3/00 ; G03B13/00 ; H04N5/232

Abstract:
An image-pickup apparatus is disclosed which is capable of restricting unnecessary focus control by an AF method other than the TV-AF method in the hybrid AF. The image-pickup apparatus includes a first detector which generates first information corresponding to a contrast state of a picked-up image, a second detector which detects second information differing from the first information and used for focus control, and a controller which performs focus processing that cyclically repeats first focus control using the first information and performs second focus control using the second information. In the focus processing, the controller is changed over between a state of restricting the second focus control and a state of allowing the second focus control, depending on a change amount of the contrast state.
Public/Granted literature
- US20080025714A1 IMAGE-PICKUP APPARATUS AND FOCUS CONTROL METHOD Public/Granted day:2008-01-31
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