Invention Grant
- Patent Title: Method of calculating lens shading compensation factor and method and apparatus for compensating for lens shading by using the method
- Patent Title (中): 计算透镜阴影补偿系数的方法以及使用该方法补偿透镜阴影的方法和装置
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Application No.: US13181783Application Date: 2011-07-13
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Publication No.: US08804013B2Publication Date: 2014-08-12
- Inventor: Soo Jin Park , Deepak Chandra Bijalwan , Raghubansh B. Gupta
- Applicant: Soo Jin Park , Deepak Chandra Bijalwan , Raghubansh B. Gupta
- Applicant Address: KR Seoul
- Assignee: LG Innotek Co., Ltd.
- Current Assignee: LG Innotek Co., Ltd.
- Current Assignee Address: KR Seoul
- Agency: Saliwanchik, Lloyd & Eisenschenk
- Priority: KR10-2011-0063821 20110629
- Main IPC: H04N9/64
- IPC: H04N9/64 ; H04N5/20
Abstract:
Provided is a method of calculating a compensation factor to compensate for lens shading due to the characteristics of an image capturing device, which requires a small amount of memory. A reference image is captured, and a compensation factor is calculated using the characteristics of a lens shading pattern of the captured reference image. A distribution of pixel values is approximated using an exponential spline function, and a compensation factor is calculated using the approximated distribution. In addition, a method and an apparatus for compensating for lens shading by using a calculated compensation factor are provided.
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