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High-pressure circuit breakers are very important and it undertakes the disconnection and connection control of high voltage transmission lines. It is one of the equipment of substation daily inspection. State of breakers are judged by open and close characters label, so a shape-prior active contour model to realize state automatic recognition of breaker images collected by inspection robot is presented in this paper. Shape-prior active contour model combines the shape information with CV modeldoi:10.4028/www.scientific.net/amm.511-512.923 fatcat:5yw5jrdgyneqxm7c27umvtlqjm