中国光学, 2015, 8 (2): 255, 网络出版: 2015-04-28
利用激光主动探测技术实现光电窥视设备检测
Detecting of photoelectric peeping devices based on active laser detection
摘要
针对激光主动探测时光电设备表现出的猫眼效应, 搭建了基于CCD的激光主动探测系统, 提出了一套有效的光电窥视设备检测算法。该算法在激光脉冲的间隔, 同时采集激光主被动图像, 根据窥视目标与普通漫反射物体的回波强度差异, 利用背景差法检测窥视目标。实验结果表明, 在半径为5 m的作用范围内, 该激光主动探测系统可有效、快速地将光电窥视目标从背景中检测出来, 并且不受场景和光照的限制。通过对光学口径为2 mm的光电窥视设备在20个不同场景环境下进行实验, 正确检测率达到95%, 且每帧的检测时间在0015~0021 s内, 满足了实时性需求, 验证了本文系统搭建方案的正确性与软件处理算法的有效性。
Abstract
Based on the cat-eye effect of photoelectric devices, this paper establishes a system of active laser detection with CCD, and puts forward an effective algorithm for detecting peeping devices. The proposed algorithm acquires one image when the laser power is on, and the other image when the laser power is off in the laser pulse interval. According to the echo intensity difference on the peeping devices and usual objects, the target is detected by using the background difference method. The experimental results show that, within a radius of 5 m, the system can effectively and quickly detect peeping devices from background, and is not influenced by the scene and light. Through the experiments on 20 different scenes, the correct detection rate is 95%, and the detection time of each frame is in the range of 0015-0021 s, meeting the demand of real-time detection, which validate the correctness and effectiveness of this system.
杨名宇. 利用激光主动探测技术实现光电窥视设备检测[J]. 中国光学, 2015, 8(2): 255. YANG Ming-yu. Detecting of photoelectric peeping devices based on active laser detection[J]. Chinese Optics, 2015, 8(2): 255.