| 王朝阳.数字图像相关方法的准确度与速度增强[J].实验力学,2011,26(5):632~638 |
| 数字图像相关方法的准确度与速度增强 |
| On the Accuracy and Speed Enhancement of Digital Image Correlation Technique |
| 投稿时间：2011-05-06 修订日期：2011-09-12 |
| DOI： |
| 中文关键词: 数字图像相关 高准确度插值 相机标定 |
| 英文关键词:digital image correlation high-accuracy interpolation camera callibration |
| 基金项目:本文得到了美国陆军研究办公室（USARO）的资助(项目号W911NF-10-1-0502)和美国国家科学基金会（NSF）的资助（项目号0825806）。 |
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| 中文摘要: |
| 数字图像相关方法已经成为近几年来最为广泛使用的实验力学方法之一。本文从算法的角度提出了增强该方法准确度与速度的几个技术。由于插值算法在数字图像相关方法测量中扮演着重要的角色,文中采用了几种基于B样条表示的递归插值算法来提高数字图像相关方法的分析准确度与计算速度。在实践中,三维的测量在许多数字图像相关方法的应用中成为主导,而三维测量的准确度强烈依赖于相机的标定。本文描述了一种利用同心圆图案以及正面图像匹配的方法来进行高可靠度和高准确度的相机标定。 |
| 英文摘要: |
| Digital image corelation (DIC) technique has become one of the most widely used methods for experimental mechanics in recent years. This paper presents a series of novel schemes to enhance the analysis accuracy and speed of DIC. Based on B-spline representation, several recursive interpolation schemes were employed to enhance analysis accuracy as well as computation speed of DIC due to the interpolation algorithm plays an essential role in the DIC measurements. In practice, three-dimensional (3D) measurement is dominant in numerous DIC applications, and the measurement accuracy of 3D-DIC highly relies on camera calibation. This paper presents an advanced method to calibrate camera to ensure high reliability and high accuracy by using concentric circle patterns and fronto-image matching. |
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