结合激光功率和光斑位置的多帧动态干扰效果评估

发布时间：2018-04-09 17:59

本文选题：成像系统　切入点：图像质量评价　出处：《中国激光》2014年11期

【摘要】：激光主动成像系统通常用于重要区域监视和危险目标识别,当该系统受到敌方激光干扰时,其成像质量将会下降。由于目标、成像系统和干扰源的相对位置,以及干扰源的干扰功率处于时刻变化中,导致不同时刻的干扰效果不尽相同,如何衡量一段时间内激光对成像系统的干扰效果成为一个难题。提出了一种基于连续多帧图像动态特征变化的无参考激光干扰评估算法,在图像目标区域内分析单帧干扰图像中特征点的匹配准确率和空间变化率以及多帧图像特征点变化的准确性、空间性、结构性差异、频率和显著性特征,最终得到归一化的评估指标。利用激光主动成像识别系统对设定目标进行照明成像识别实验,采集不同干扰功率和干扰方位的激光干扰图像。基于提出的特征点动态性算法对获得的连续多帧激光干扰图像进行评估,结果表明该算法能够准确评价一段持续干扰过程中不同功率、方位的激光干扰效果,客观反映光斑遮盖下自动目标识别算法的失效程度。
[Abstract]:Laser active imaging system is usually used for important area monitoring and dangerous target recognition. When the system is disturbed by enemy laser, the imaging quality will decline.Because the target, the relative position of the imaging system and the interference source, and the interference power of the interference source are changing at all times, the jamming effect is not the same at different times.How to measure the effect of laser interference on imaging system for a period of time has become a difficult problem.In this paper, a non-reference laser interference evaluation algorithm based on dynamic feature change of continuous multi-frame images is proposed.The matching accuracy and spatial change rate of feature points in single frame interference image and the accuracy, spatial, structural difference, frequency and significance of feature point change in multi-frame image are analyzed in the target region of image.Finally, a normalized evaluation index is obtained.The laser active imaging recognition system is used to detect the illumination image of the target, and the laser interference images with different interference power and interference azimuth are collected.Based on the feature point dynamic algorithm proposed, the continuous multi-frame laser jamming images are evaluated. The results show that the algorithm can accurately evaluate the laser jamming effect with different power and azimuth in a continuous jamming process.The degree of failure of automatic target recognition algorithm under spot covering is objectively reflected.
【作者单位】：中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室;中国科学院大学;
【基金】：国家重点实验室自主基础研究(SKLLIM1203-01)
【分类号】：TN977

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