Invention Grant
US08941775B2 Systems, methods, and devices for flash exposure control using preflash statistics
有权
使用预闪统计的闪光曝光控制的系统,方法和设备
- Patent Title: Systems, methods, and devices for flash exposure control using preflash statistics
- Patent Title (中): 使用预闪统计的闪光曝光控制的系统,方法和设备
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Application No.: US14247505Application Date: 2014-04-08
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Publication No.: US08941775B2Publication Date: 2015-01-27
- Inventor: Haitao Guo , David Daming Kuo
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Main IPC: H04N9/68
- IPC: H04N9/68 ; H04N5/235

Abstract:
Systems, methods, and devices for obtaining a properly exposed strobe-illuminated image are provided. One method for doing so may include, for example, gathering image capture statistics during a first period when a strobe is not emitting light and during a second period when the strobe emits a preflash. These image capture statistics may include distinct image capture control statistics and luma values associated with the periods. Final image capture control statistics then may be determined based at least in part on the first luma value normalized to the first image capture control statistics and the second luma value normalized to the second image capture control statistics. Thereafter, the final image capture control statistics may be used to capture a properly exposed strobe-illuminated image when the strobe emits a main flash.
Public/Granted literature
- US20140285709A1 SYSTEMS, METHODS, AND DEVICES FOR FLASH EXPOSURE CONTROL USING PREFLASH STATISTICS Public/Granted day:2014-09-25
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