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针对激光主动成像图像信噪比较低、目标难以被实时探测和识别的问题,提出了一种多通道序贯概率比检验(SPRT)的激光主动成像目标探测方法。基于原始观测数据,构造对数似然比检验,给出似然比判据及阈值的计算方法。结合激光主动成像的多通道特性,采用序贯概率比检验,在给定虚警概率和检测概率的情况下,对仿真的强度像和距离像通道进行探测。理论分析和实验结果表明,该方法能够实现对激光主动成像图像中目标的可靠检测,且具有检验速度快、所需样本少以及可在线计算等优点,可以满足激光主动成像制导中目标探测的准确性和实时性要求。
In view of the low signal-to-noise ratio of laser active imaging and the difficulty of target detection and recognition in real time, a multi-channel sequential probability ratio test (SPRT) laser active imaging target detection method is proposed. Based on the original observation data, the log-likelihood ratio test was constructed and the likelihood ratio criterion and the threshold calculation method were given. Combined with the multi-channel characteristics of laser active imaging, the sequential probability ratio test is used to detect the simulated intensity image and distance image channel given the false alarm probability and detection probability. Theoretical analysis and experimental results show that this method can achieve the reliable detection of targets in laser active imaging images and has the advantages of fast inspection speed, small sample required and on-line calculation, which can meet the accuracy of target detection in laser active imaging guidance Sexual and real-time requirements.