Potential field anomaly edge enhancement method based on transition zone and phase congruency

The invention provides a potential field anomaly edge enhancement method based on a transition zone and phase congruency. The method is applied to researches of determination geologic body edge positions through potential field (gravity field and magnetic field) anomaly. Judgment of edge positions of underground anomalous bodies is achieved through the steps of improved calculation of co-occurrence matrixes, determination of transition zone anomalous ranges, calculation of thresholding contrast, extraction of phase congruency information, fusion processing of the thresholding contrast and the phase congruency information, judgment of gravity and magnetic data processing results and the like. According to the method, the thresholding contrast and the congruency information are fused, edge positions are guaranteed through enhancement of transition zones, and sensitivity of phase congruency information to weak anomaly can be used simultaneously. The method has the advantages of being capable of highlighting the edge anomaly and revealing subtle differences, and high in accuracy and resolving power.