基于斜率关联函数的弹丸位置深度估计方法  

Projectile Position and Depth Estimation Method Based on Slope Correlation Function

作　　者：岳世强 李翰山[1] 张晓倩[1] YUE Shiqiang;LI Hanshan;ZHANG Xiaoqian(School of Electronic Information Engineering,Xi'an University of Technology,Xi'an 710021,China)

机构地区：[1]西安工业大学电子信息工程学院,陕西西安710021

出　　处：《探测与控制学报》2021年第6期55-61,共7页Journal of Detection & Control

基　　金：陕西省重点研发计划项目资助(2020GY-125);国家自然科学基金项目资助(62073256)。

摘　　要：针对靶场测试领域弹丸深度信息估计精度低、速度慢的问题,提出基于斜率关联函数的弹丸位置深度估计方法。该方法通过分析光场相机微阵列透镜成像原理,给出弹丸通过光场相机测试区域任意位置时的深度信息与光场相机的焦距和重聚焦系数之间的关联,结合弹丸深度信息与重聚焦平面占积分元长度的关系,推导了任意位置弹丸深度信息的解析函数。仿真实验结果表明,光场相机焦距在35~280 mm与弹丸和光场相机光轴夹角0到π/2范围内,随着弹丸和光场相机光轴夹角和焦距的增大其弹丸深度信息误差逐渐变大,弹丸位置深度估计精度达到10%,为靶场武器测试领域弹丸深度信息的估计提供了方法。Aiming at the problem of low accuracy and slow speed of projectile depth information estimation in range test field,a method of projectile position depth estimation based on slope correlation function was proposed.By analyzing the imaging principle of the micro array lens of the light field camera,the correlation between the depth information of the projectile passing through any position in the test area of the light field camera and the focal length and refocusing coefficient of the light field camera were given.Combined with the relationship between the depth information of the projectile and the length of the refocusing plane in the integral element,the analytic function of the depth information of the projectile at any position was derived.Simulation results showed that the focal length of light field camera was in the range of 35-280 mm and the angle between the optical axis of projectile and light field camera was 0 to π/2,with the increase of the angle and focal length between the optical axis of projectile and light field camera,the error of projectile depth information gradually increases,and the accuracy of projectile position depth estimation reaches 10%,which provided a method for the estimation of projectile depth information in the field of weapon testing in shooting range.

关 键 词：深度估计 重聚焦 积分元 斜率关联 深度梯度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]