基于三点虚拟圆的被动测距

付小宁; 王洁

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基于三点虚拟圆的被动测距

付小宁, 王洁

文章导航 > 红外与激光工程 > 2014 > 43(9): 3042-3045

付小宁, 王洁. 基于三点虚拟圆的被动测距[J]. 红外与激光工程, 2014, 43(9): 3042-3045.

引用本文:

付小宁, 王洁. 基于三点虚拟圆的被动测距[J]. 红外与激光工程, 2014, 43(9): 3042-3045.

Fu Xiaoning, Wang Jie. Passive ranging based on virtual circle from three matched points[J]. Infrared and Laser Engineering, 2014, 43(9): 3042-3045.

Citation:

Fu Xiaoning, Wang Jie. Passive ranging based on virtual circle from three matched points[J]. Infrared and Laser Engineering, 2014, 43(9): 3042-3045.

基于三点虚拟圆的被动测距

付小宁¹,
王洁²

1.
西安电子科技大学机电工程学院,陕西西安710071;
2.
西安应用光学研究所,陕西西安710065

基金项目:

国家自然科学基金（60872136，61107007）;陕西省自然科学基金（2011JM8002）

详细信息

作者简介:
付小宁（1964- ），男，副教授，博士，主要从事光电探测及光电对抗方面的研究。Email：xning_fu@163.com

中图分类号: TP391.4;TN820.4

Passive ranging based on virtual circle from three matched points

Fu Xiaoning¹,
Wang Jie²

1.
School of Electromechanical Engineering,Xidian University,Xi'an 710071,China;
2.
Xi'an Institute of Applied Optics,Xi'an 710065,China

摘要: 在被动定位中，从图像中提取目标的线性旋转不变特征很重要，而非合作目标特征提取要比合作目标困难得多。借鉴圆形目标固有的旋转不变特性，提出了一种虚拟圆方法。该虚拟圆为图像序列相邻帧内三个匹配点经等边三角形向外延拓生成的三个点的外接圆。模拟结果表明，此虚拟圆较其他途径构成的虚拟圆有尖锐的误差分布概率密度函数，进一步研究表明该虚拟圆的直径是一个相当不错的距离相关线段特征。线段特征用于距离估计的特点是简单，虚拟圆概念则增加了它在应用中的灵活性。因为三个匹配点是基于目标特征跟踪的最少匹配点数，故该方法在非合作目标被动定位中具有吸引力。该方法对相邻帧成像时目标相对相机偏斜变化不超过10有效。
- 机器视觉 /
- 旋转不变 /
- 模式识别 /
- 目标跟踪 /
- 距离测量
Abstract: It is critical to extract the linear rotational invariant of an imaged target in passive ranging from the images, and it' s more difficult to extract the parameters from a general non-cooperative than from a cooperative ones. A method was presented to construct a virtual circle as the inherent rotation invariance of a circular target. The proposed virtual circle was the circumcircle of equilateral by triangles extended from three matched points in adjacent frames in the image sequence. It is demonstrated by the simulations that the probability density function curve of the proposed virtual circle has tighter error distribution than that of a few other methods, and further studies indicate that the diameter of this virtual circle is also a preferable depth-related line segment feature. The line segment feature is used for the target distance estimation and it displays superior performance. It is characterized by its simple for the distance estimation using line segment features, and the concept of virtual circle increases the flexibility in practice. Because as few as three matched points are the least points in target tracking based image feature, so it is attractive for passive ranging to non-cooperative targets. The method is valid under the condition of the inclination angle of target relative to camera increased or decreased from -10 degree to 10 degree between adjacent sampling times.
- machine vision /
- rotation-invariant /
- pattern recognition /
- target tracking /
- range finding

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基于三点虚拟圆的被动测距

付小宁¹,
王洁²

1. 西安电子科技大学机电工程学院,陕西西安710071;

2. 西安应用光学研究所,陕西西安710065

作者简介:
付小宁（1964- ），男，副教授，博士，主要从事光电探测及光电对抗方面的研究。Email：xning_fu@163.com

收稿日期: 2014-01-14
修回日期: 2014-02-13
刊出日期: 2014-09-25

基金项目:

国家自然科学基金（60872136，61107007）;陕西省自然科学基金（2011JM8002）

中图分类号: TP391.4;TN820.4

关键词:

摘要: 在被动定位中，从图像中提取目标的线性旋转不变特征很重要，而非合作目标特征提取要比合作目标困难得多。借鉴圆形目标固有的旋转不变特性，提出了一种虚拟圆方法。该虚拟圆为图像序列相邻帧内三个匹配点经等边三角形向外延拓生成的三个点的外接圆。模拟结果表明，此虚拟圆较其他途径构成的虚拟圆有尖锐的误差分布概率密度函数，进一步研究表明该虚拟圆的直径是一个相当不错的距离相关线段特征。线段特征用于距离估计的特点是简单，虚拟圆概念则增加了它在应用中的灵活性。因为三个匹配点是基于目标特征跟踪的最少匹配点数，故该方法在非合作目标被动定位中具有吸引力。该方法对相邻帧成像时目标相对相机偏斜变化不超过10有效。

English Abstract

Passive ranging based on virtual circle from three matched points

Fu Xiaoning¹,
Wang Jie²

1. School of Electromechanical Engineering,Xidian University,Xi'an 710071,China;

2. Xi'an Institute of Applied Optics,Xi'an 710065,China

Received Date: 2014-01-14
Rev Recd Date: 2014-02-13
Publish Date: 2014-09-25

Keywords:

Abstract: It is critical to extract the linear rotational invariant of an imaged target in passive ranging from the images, and it' s more difficult to extract the parameters from a general non-cooperative than from a cooperative ones. A method was presented to construct a virtual circle as the inherent rotation invariance of a circular target. The proposed virtual circle was the circumcircle of equilateral by triangles extended from three matched points in adjacent frames in the image sequence. It is demonstrated by the simulations that the probability density function curve of the proposed virtual circle has tighter error distribution than that of a few other methods, and further studies indicate that the diameter of this virtual circle is also a preferable depth-related line segment feature. The line segment feature is used for the target distance estimation and it displays superior performance. It is characterized by its simple for the distance estimation using line segment features, and the concept of virtual circle increases the flexibility in practice. Because as few as three matched points are the least points in target tracking based image feature, so it is attractive for passive ranging to non-cooperative targets. The method is valid under the condition of the inclination angle of target relative to camera increased or decreased from -10 degree to 10 degree between adjacent sampling times.