Pavement marking detection method, system and terminal based on pixel difference expansion processing

The invention discloses a pavement marking detection method, system and terminal based on pixel difference expansion processing, and relates to the technical field of image recognition, and the technical scheme is characterized in that the method comprises the steps: obtaining the pavement image data of a target road section; performing expansion processing on pixel value differences in the pavement image data to obtain reconstructed pavement image data; and preprocessing the reconstructed pavement image data, inputting the preprocessed reconstructed pavement image data into a pre-constructed image segmentation recognition model, and performing segmentation recognition to obtain a recognition result of pavement marking detection on the pavement image data. According to the method, the pixel value difference in the road surface image data is expanded, and the overall boundary contour distribution condition in the road surface image is enhanced, so that local contours, such as cracks and shelters, in the road s