Invention Grant
US09386243B2 Lens shading correction method and image signal processing device and image sensor system employing the method
有权
镜头阴影校正方法和图像信号处理装置及采用该方法的图像传感器系统
- Patent Title: Lens shading correction method and image signal processing device and image sensor system employing the method
- Patent Title (中): 镜头阴影校正方法和图像信号处理装置及采用该方法的图像传感器系统
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Application No.: US14578608Application Date: 2014-12-22
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Publication No.: US09386243B2Publication Date: 2016-07-05
- Inventor: Dongpan Lim , Taechan Kim
- Applicant: SAMSUNG ELECTRONICS CO., LTD.
- Applicant Address: KR Suwon-si, Gyeonggi-do
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si, Gyeonggi-do
- Agency: Volentine & Whitt, PLLC
- Priority: KR10-2013-0165544 20131227
- Main IPC: H04N5/357
- IPC: H04N5/357 ; H04N5/217 ; H04N9/04
Abstract:
A lens shading correction method includes providing lens shading correction profile data; calculating an intensity values of light passing through each of one or more visible light pass filters and each of one or more infrared light pass filters; calculating an average of the intensity values of the light passing through the one or more visible light pass filters; calculating an average of the intensity values of the light passing through the one or more infrared light pass filters; calculating a normalized intensity value of the light passing through the one or more infrared light pass filters, based on the calculated averages; adjusting one or more lens shading correction coefficients included in the lens shading correction profile data and each having a value varying depending on a frequency element of light, based on the calculated normalized intensity value; and correcting lens shading by using the adjusted lens shading correction coefficient.
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