| 基于非均匀采样的图像射影畸变硬件校正 |
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| 引用本文： | 蒋伟平,王晓年,蒋平,朱劲.基于非均匀采样的图像射影畸变硬件校正[J].数据采集与处理,2011,26(2). |
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| 作者姓名： | 蒋伟平 王晓年 蒋平 朱劲 |
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| 作者单位： | 同济大学电子与信息工程学院,上海,201804 |
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| 基金项目： | 国家高技术研究发展计划(“八六三”计划)(2006AA04Z222)资助项目 |
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| 摘 要： | 当摄像机的像平面与拍摄面不平行时,图像必然发生射影畸变,给后续的图像处理和模式识别带来不便。现有校正方法大都在得到畸变图像后,通过实时计算或者查阅畸变表恢复图像像素间的度量关系。本文提出了一种基于非均匀采样的硬件图像校正采集系统,通过FPGA控制A/D采样器对模拟图像信号进行非均匀采样,实现图像的实时畸变校正和采集。为减小采样误差,还提出了一种倍频方案。仿真表明本系统可以代替软件校正算法,其硬件系统可拓展至其他应用。
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| 关 键 词： | 非均匀采样 射影畸变 FPGA 图像校正 单应关系 |
Hardware Implementation with Non-uniform Sampling for Image Rectification of Projective Distortion |
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| Jiang Weiping,Wang Xiaonian,Jiang Ping,Zhu Jin.Hardware Implementation with Non-uniform Sampling for Image Rectification of Projective Distortion[J].Journal of Data Acquisition & Processing,2011,26(2). |
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| Authors: | Jiang Weiping Wang Xiaonian Jiang Ping Zhu Jin |
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| Affiliation: | Jiang Weiping,Wang Xiaonian,Jiang Ping,Zhu Jin(School of Electronics and Information Engineering,TongJi University,Shanghai,201804,China) |
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| Abstract: | When an image plane and a physical surface are not parallel,projective distortion will occur.It is inconvenient for subsequent image processing and pattern recognition because of such image distortion.Nowadays,the software based rectifying methods depend on either online calculation or a distortion look-up table to restore the image measurement.A non-uniform sampling based hardware system for image rectifying is proposed in this paper,in which an FPGA is designed to control an ADC for non-uniform sampling o... |
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| Keywords: | non-uniform sampling projective distortion FPGA image rectification homograph |
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