Locomotive number location based on Retinex image enhancement and improved SWT algorithm

In order to solve the problems of poor robustness and low real-time performance of traditional algorithms for locomotive number location, a vehicle number location method based on Retinex image enhancement and improved stroke width transformation algorithm is proposed. Retinex algorithm is used to enhance the image edge information, and the edge detection and maximum stable extremum region algorithm are used to roughly locate the train number. Then, the improved stroke width transformation algorithm is used to calculate the stroke width and stroke gradient, and the threshold value is set to limit the search range of pixels to avoid global search and improve the timeliness of the algorithm. The experimental results show that compared with the existing algorithms, the positioning accuracy of the proposed algorithm is improved by 4.72%, the time complexity is reduced by 45.03% compared with the traditional stroke width transformation algorithm, and it also shows good positioning effect when applied to other scenes.