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Automatic radial distortion correction in zoom lens video camera

[+] Author Affiliations
Daehyun Kim

University of Wisconsin-Milwaukee, Department of Health Science, 2400 E Hartford Ave, Milwaukee WI 53211

Hyoungchul Shin

University of Wisconsin-Milwaukee, Department of Health Science, 2400 E Hartford Ave, Milwaukee WI 53211

Juhyun Oh

Yonsei University, Korean Broadcasting System, Broadcast Technical Research Institute, Yoido-dong 18, Youngdungpo-gu, Seoul, 150-790, Republic of Korea

Kwanghoon Sohn

Yonsei University, School of Electrical and Electronic Engineering, C129, Third Engineering Building, 262 Seongsanno, Seodaemun-gu, Seoul, 120-749, Republic of Korea

J. Electron. Imaging. 19(4), 043010 (December 07, 2010). doi:10.1117/1.3503524
History: Received March 30, 2010; Revised August 23, 2010; Accepted August 30, 2010; Published December 07, 2010; Online December 07, 2010
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We present a novel method for automatically correcting the radial lens distortion in a zoom lens video camera system. We first define the zoom lens distortion model using an inherent characteristic of the zoom lens. Next, we sample some video frames with different focal lengths and estimate their radial distortion parameters and focal lengths. We then optimize the zoom lens distortion model with preestimated parameter pairs using the least-squares method. For more robust optimization, we divide the sample images into two groups according to distortion types (i.e., barrel and pincushion) and then separately optimize the zoom lens distortion models with respect to divided groups. Our results show that the zoom lens distortion model can accurately represent the radial distortion of a zoom lens.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Daehyun Kim ; Hyoungchul Shin ; Juhyun Oh and Kwanghoon Sohn
"Automatic radial distortion correction in zoom lens video camera", J. Electron. Imaging. 19(4), 043010 (December 07, 2010). ; http://dx.doi.org/10.1117/1.3503524


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