With the continuous improvement of ecological environment,substations frequently encounter bird nest defects,which has become a serious threat to safe and stable operation of power system.The image recognition-based technologies for detecting substation bird nests,with the advantages of high inspection efficiency and short detection peri-od,are the focus of this review.First key technologies of bird nest image recognition such as preprocessing,feature ex-traction and target detection algorithm are introduced in detail.Then difficulties and pain points of the technologies in practical applications are analyzed and discussed based on test and operation results of Suzhou Power Supply Company.Fi-nally the improvement measures on technology and management are proposed.
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