| 谢良,郭虞,徐玉华,张小虎*.考虑中心对称约束的标记点高精度定位方法[J].实验力学,2016,31(6):836~842 |
| 考虑中心对称约束的标记点高精度定位方法 |
| On a High Precision Positioning Method of Mark Point by Taking into Account the Central Symmetry Constraint |
| 投稿时间：2015-07-29 修订日期：2016-05-09 |
| DOI：10.7520/1001-4888-15-129 |
| 中文关键词: 精密光测 亚像素定位 中心对称优化 高斯拟合定位 |
| 英文关键词:accurate optical measurement sub-pixel positioning central symmetry optimization gaussian fitting location |
| 基金项目:国家自然科学青年基金(61402489) 资助项目 |
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| 中文摘要: |
| 利用视觉方法对目标进行高精度定位在科研和工业生产中有着广泛的应用。本文研究了中心对称标记点的定位算法。首先，标记点的设置采用中心对称阵列排布的方式，为后续标记点定位提供鲁棒的定位信息；其次，利用高斯模板拟合的方法对圆形标记点中心进行定位，能够有效地抑制噪声等影响；最后，利用灰度的中心对称性对定位结果进行优化，确定最终的标记点位置。经实验验证，与基于轮廓信息的定位方法相比，本文方法对图像对比度的适用范围有明显的提升。与传统的基于模板匹配的定位方法相比，本文方法有更好的抗噪性和稳定性。 |
| 英文摘要: |
| Using visual method to locate the target with high precision is widely used in scientific research and industrial production. In this paper, a positioning algorithm for central symmetry mark points is presented. First of all, the mark point set is based on central symmetric array arrangement, which provides the location information for the following robust mark point positioning. Secondly, using the method of Gauss template fitting to locate the center of the circular mark points can effectively restrain the noise etc. Finally, the central symmetry of the gray scale is used to optimize the positioning results, and the final mark points are determined.Experimental results show that the proposed method can significantly improve the range of image contrast compared with the method based on contour information. Compared with the traditional positioning method based on template matching, this method has better noise immunity and stability. |
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