| PIV流场量测中图像变形的修正 |
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| 引用本文： | 禹明忠,王兴奎,庞东明,王殿常.PIV流场量测中图像变形的修正[J].泥沙研究,2001,24(5):59-62. |
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| 作者姓名： | 禹明忠 王兴奎 庞东明 王殿常 |
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| 作者单位： | 清华大学水利水电工程系, |
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| 基金项目： | 国家自然科学基金和水利部联合资助重大项目 (编号 :5 9890 2 0 0 ) |
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| 摘 要： | 在用PIV技术测量流速场时，会因图像的几何变形而引起计算的误差。本文试验标定了不同型号的摄像系统的变形误差，论证了图像几何变形的特性，并提出了相应的校正公式，推荐的系统配置经校正后的图像几何变形误差小于0．4个象素。
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| 关 键 词： | 镜头标定 粒子图像测速 颗粒示踪 图像处理 PIV技术 流速场 摄像机 |
| 文章编号： | 0468-155X(2001)05-0059-04 |
| 修稿时间： | 1999年11月5日 |
Calibration of the Image Distortion in Measuring Velocity Field with PIV |
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| YU Ming zhong,WANG Xing kui,PANG Dong ming,WANG Dian chang.Calibration of the Image Distortion in Measuring Velocity Field with PIV[J].Journal of Sediment Research,2001,24(5):59-62. |
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| Authors: | YU Ming zhong WANG Xing kui PANG Dong ming WANG Dian chang |
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| Abstract: | The error of image geometric distortion induced by the CCD camera greatly reduces the computational precision when using PIV technique to measure the velocity field. The properties of the image distortion were investigated and the distortion error in various imaging systems was acquired from experiments. Thus, calibration formulas were obtained. The error after calibration was less than 0.4 pixel for the recommended system. |
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| Keywords: | CCD camera calibration PIV |
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