光子学报, 2019, 48 (2): 0211003, 网络出版: 2019-03-23   

超大视场红外双目视觉极线约束与空间定位

Ultra-wide Field Infrared Binocular Vision Epipolar Constraint and Spatial Positioning
作者单位
陆军工程大学石家庄校区 电子与光学工程系, 石家庄 050003
摘要
针对传统可见光、红外小视场视觉定位系统易受光照条件影响、环境适应性差、视觉信息不足等缺陷, 提出了一种基于超大视场红外双目视觉的非线性极线约束与目标定位方法.利用全景相机畸变模型对超大视场红外相机成像过程的几何关系进行分析, 建立了一般结构的超大视场红外双目视觉系统成像模型, 完成了同名像点非线性极线约束方程的数理推导; 以此模型为基础, 研究了一种适用于超大视场红外双目视觉系统的目标三维空间定位解算方法.实验结果表明:不同环境照度场景中距离为1.75~8.05 m的8个目标点在极线方程约束下, 同名像点的匹配搜索由二维降为一维, 将匹配同名像点坐标带入三维空间定位解算方程, 距离误差在0.9%~7.0%之间, 较高的定位精度验证了所提方法的正确性, 以及超大视场红外双目视觉系统的空间定位能力与优势.
Abstract
Traditional visible light and infrared small field view positioning systems have some shortcomings, such as vulnerable to light conditions, poor environmental adaptability, and lack of visual information. In order to overcome these shortcomings, nonlinear epipolar constraint and target spatial positioning method based on ultra-wide field infrared binocular vision system was proposed. The generalized camera distortion model was used to describe the infrared ultra-wide camera imaging process, and the binocular system distortion model of non-parallel structure was establish. And then the theoretical derivation of the nonlinear epipolar constraint equation for homonymous image points was completed. A target location algorithm for ultra-wide field infrared binocular vision system was established from the point of view of space geometry. The experimental results show that the matching search of homonymous image points, included eight target points with the distance from 1.75~8.05 m in different scenes, is reduced from two-dimensional to one-dimensional under the conditions of epipolar constraint. The matching results were brought into the solution equation of three-dimensional spatial positioning and the distance error of positioning is between 0.9% and 7.0%. The higher positioning accuracy shows the correctness of the proposed method, and verifies the spatial positioning ability and advantage of the ultra-wide field infrared binocular vision system.

陈一超, 刘秉琦, 黄富瑜. 超大视场红外双目视觉极线约束与空间定位[J]. 光子学报, 2019, 48(2): 0211003. CHEN Yi-chao, LIU Bing-qi, HUANG Fu-yu. Ultra-wide Field Infrared Binocular Vision Epipolar Constraint and Spatial Positioning[J]. ACTA PHOTONICA SINICA, 2019, 48(2): 0211003.

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