Dual-band infrared dim target detection based on hybrid fusion algorithm

Dim target fusion detection in dual-band IR image is one of the key technology and research hotspot of infrared homing system. In order to establish an effective fusion-detection structure, the Boolean logic rules based fusion algorithm was analyzed. According to the principle of dim infrared target imaging, a hybrid fusion detection algorithm with AND logic and local gray was proposed based on the full use of local gray feature of dim target. First of all, infrared image of each band was segmented. Secondly, the detection results of two bands were fused using AND logic. Thirdly, to improve the probability of detection, the point beyond AND logic was determined using local gray feature. Finally, in order to optimize the local detector, the segmentation threshold in the first step was adjusted based on the fusion results. Simulation results show that the algorithm can improve the dual-band infrared detection capabilities effectively. Further, the algorithm features simple architecture and high computation speed, which makes it highly practical.