Invention Grant
- Patent Title: Phase difference detection device, imaging apparatus, phase difference detection method
- Patent Title (中): 相位差检测装置，成像装置，相位差检测方法
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Application No.: US12503974Application Date: 2009-07-16
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Publication No.: US08149324B2Publication Date: 2012-04-03
- Inventor: Makoto Oikawa
- Applicant: Makoto Oikawa
- 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: JP2008-186401 20080717
- Main IPC: H04N5/232
- IPC: H04N5/232 ; H04N5/238 ; H04N9/64 ; G06K9/40 ; G06K9/46 ; G03B13/00 ; G03B7/099 ; G01D5/34
Abstract:
The ratio between an image A and an image B is calculated as the comparison result of the images A and B obtained from a pair of optical images. The variance is then calculated in order to evaluate the statistical fluctuation of the ratio obtained for each pixel. The fluctuation due to the variance is evaluated for each phase difference while the phase between the image A and the image B is shifted. The phase difference detection is performed on the basis of the evaluation result of the fluctuation.
Public/Granted literature
- US20100013947A1 PHASE DIFFERENCE DETECTION DEVICE, IMAGING APPARATUS, PHASE DIFFERENCE DETECTION METHOD Public/Granted day:2010-01-21
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