基于GLRT的红外多光谱弱小运动目标检测

针对多光谱红外图像序列中未知光谱辐射强度、位置和速度的弱小运动目标检测问题,建立了与之相应的基本框架模型.对于这种含参信号的复合假设检验问题,采用广义似然比检验(GLRT)得到了该问题的检测算子,同时利用速度滤波器组在实际应用中实现了该检测算子.从理论角度估计了该算法的虚警概率和检测概率,并通过计算机仿真验证了上述分析...

Dim moving target detection in multispectral IR image sequence based on GLRT

The scope of this paper addresses the problem of detecting a dim moving target from a sequence of multispectral IR cubes. In this work, the detection problem is formulated in a general framework, assuming unknown target amplitude, position and velocity. This composite hypothesis testing problem is approached by means of the generalized likelihood ratio test (GLRT) theory. The detector structure and its actual implementation based on velocity filters are discussed in detail. Approximated expressions of the false alarm and detection probabilities are obtained and validated by means of simulation. To test the effectiveness of the detection algorithm, the detection results obtained on a set of synthetic multispectral IR image sequences are presented and discussed, and these results indicate that the algorithm proposed in this paper can obtain a good performance on dim target detection with low SNR.