Invention Grant
- Patent Title: Image processing apparatus and image processing method
- Patent Title (中): 图像处理装置和图像处理方法
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Application No.: US12955703Application Date: 2010-11-29
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Publication No.: US08345151B2Publication Date: 2013-01-01
- Inventor: Takeshi Ikeda
- Applicant: Takeshi Ikeda
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon USA Inc. IP Division
- Priority: JP2009-273890 20091201
- Main IPC: H04N9/68
- IPC: H04N9/68 ; H04N5/235 ; H04N5/222 ; H04N5/228 ; G03B9/70 ; G03B7/00

Abstract:
An image processing apparatus includes a distribution detection unit configured to detect whether a luminance distribution on the screen changes to a hill-shaped form, based on a result of adding photometric values of each of divided photometry areas by rows and by columns, a difference calculation unit configured to calculate a luminance value difference between one portion of the screen and the peripheral portion thereof, a ratio calculating unit configured to calculate a ratio of pixels having a luminance value higher than or equal to a threshold value in the one portion, and a spotlight determination unit configured to determine whether a scene of the captured image is a spotlight scene according to a detection result of the distribution detection unit, calculation result of the difference calculation unit, and a calculation result of the ratio calculation unit.
Public/Granted literature
- US20110128435A1 IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD Public/Granted day:2011-06-02
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