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Recognition of Catenary Mast Number in Rail Transit

Automatic recognition of catenary mast number facilitates maintenance work. In this paper, a method of identification of the mast number is developed and implemented in a contact wire inspection vehicle. Firstly, the Hough transform is applied to get the general localization of the number plate. Secondary, morphological methods are used to select the accurate positioning of the number plate, and then the vertical projection method is developed to segment the number plate to obtain the individual digital. At last, the structural features and pattern matching are combined to identify the number plate digits. Most of the images are correctly identified and the recognition algorithm is also validated by real-time imaging of the mast number in the moving inspection vehicle. The result shows the algorithm is robust enough for the identification of the mast number.