Invention Grant
- Patent Title: Focusing method, suitable for an image capturing apparatus using in an environment of low brightness and image capturing apparatus using the same
- Patent Title (中): 适用于在低亮度环境下使用的摄像装置的摄像方法及使用该拍摄装置的摄像装置
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Application No.: US11940324Application Date: 2007-11-15
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Publication No.: US08139137B2Publication Date: 2012-03-20
- Inventor: Ming-Feng Chiang , Chia-Ho Lin , Jung-Che Tsai
- Applicant: Ming-Feng Chiang , Chia-Ho Lin , Jung-Che Tsai
- Applicant Address: TW Hsinchu
- Assignee: Novatek Microelectronics Corp.
- Current Assignee: Novatek Microelectronics Corp.
- Current Assignee Address: TW Hsinchu
- Agency: Jianq Chyun IP Office
- Priority: TW96121491A 20070614
- Main IPC: G03B13/00
- IPC: G03B13/00 ; H04N5/232
Abstract:
A focusing method, suitable for an image capturing apparatus using in an environment of low brightness, is provided herein. The focusing method includes that an image sensing unit in the image capturing apparatus is wholly or partially divided into a plurality of regions, and digital image data sensed by the image sensing unit is divided into a plurality of sets corresponding to the regions of the image sensing unit. The regional image data corresponding to each of the regions are summed up during the focusing step, so as to obtain a sum of data for each region. Each sum of data is used to calculate a corresponding contrast value, and the contrast value is used to perform calculations for the focusing step, so as to obtain a focus.
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