As a passive object detection method,the magnetic anomaly detection method has received widespread attention due to its good concealment performance and strong anti-interference capability. Various magnetic anomaly detection methods continue to emerge,and the range of application continues to expand. From the perspective of signal feature selection,the principles of two types of magnetic anomaly detection methods are reviewed. The research status represented by 3 detection methods of OBF(standard orthogonal basis),MED (minimum entropy),and HOC(high-order zero crossing)is described in detail. The furture research trend is analyzed,which provides a reference for the study of magnetic anomaly detection.
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