Cable identifier automatic updating and cable external damage hidden danger grading alarm method

The invention provides a cable identifier automatic updating and cable external damage hidden danger grading alarm method. A template image with a cable identifier and a to-be-updated image are acquired; performing image matching on the template image and the to-be-updated image to obtain a perspective transformation matrix; obtaining an updated cable identifier on the to-be-updated image according to the perspective transformation matrix, and taking the to-be-updated image with the updated cable identifier as an updated template image; on the updated template image, on the basis of the updated cable identifier, a third-level alarm area is generated to give an alarm; according to the invention, monitoring deviation caused by movement of a camera lens in a complex scene can be effectively dealt with, the cable trend or the electronic fence can be automatically updated, and the monitoring alarm precision is improved. 本发明提供了一种电缆标识自动更新及电缆外破隐患分级告警方法，获取带有电缆标识的模板图像以及待更新图像；将模板图像以及待更新图像进行图像匹配，得到透视变换矩阵；根据透视变换矩阵得到待更新图像上