| 一种利用SURF特征自标定相机焦距的方法 |
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| 引用本文： | 吴文欢,高景菊,王永亮.一种利用SURF特征自标定相机焦距的方法[J].周口师范学院学报,2012,29(5):101-103. |
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| 作者姓名： | 吴文欢 高景菊 王永亮 |
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| 作者单位： | 1. 周口师范学院计算机科学与技术学院,河南周口,466001
2. 郑州大学信息网络重点实验室,河南郑州,450001 |
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| 基金项目： | 国家自然科学基金(No.60973096);航空科学基金(No.2010ZC56007);周口师范学院青年科研基金资助项目(No.2012QN04) |
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| 摘 要： | 鉴于SURF算法能快速而稳定地提取图像特征,提出一种基于SURF特征进行快速标定相机焦距的方法.相机模型采用单参数模型（即只有焦距未知）,先使用SURF算法得到图像匹配点对,这些匹配点对用于计算基础矩阵,然后根据Kruppa方程推导出一个二次方程,进而求解出焦距.实验结果验证了此方法的有效性和正确性.
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| 关 键 词： | SURF 基础矩阵 Kruppa方程 自标定焦距 |
Camera focal length self-calibration using SURF characteristics |
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| WU Wenhuan,GAO Jingju,WANG Yongliang.Camera focal length self-calibration using SURF characteristics[J].Journal of Zhoukou Normal University,2012,29(5):101-103. |
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| Authors: | WU Wenhuan GAO Jingju WANG Yongliang |
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| Institution: | 1.School of Computer Science and Technology,Zhoukou Normal University,Zhoukou 466001,China; 2.Key Laboratory of Information Network,Zhengzhou University,Zhengzhou 450001,China) |
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| Abstract: | In view of the fact that SURF algorithm can rapidly and stably extract image characteristics,a method for camera focal length self-calibration based on SURF characteristics was proposed in this paper.The single parameter model was adopted as for camera model,that is,the focal length was not determined only.Firstly the matched-point sets were calculated by SURF algorithm to calculate fundamental matrix.Secondly a quadratic equation was educed according to the Kruppa equation,and then the focal length can be solved.The experimental results validated the validity and correctness of this method. |
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| Keywords: | SURF fundamental matrix Kruppa equation focal length self-calibration |
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