Abstract:

In order to implement the skew correction of images in the anti-false and auto-checking system for railway ticket , a method of the skew correction is proposed based on Hough transform. In the proposed method , the objective information of the ticket images is extracted from the background according to the attribute of railway ticket images and the existing algorithm of skew detection , and the horizontal trajectories are smoothed before picking up the characteristic line of text. Theh , multi-stage Hough transform is adopted to determine the skew angle , and the line fitting technique is used to correct the skew images. Experimental results verify the effectiveness and reliability of the proposed algorithm.

Key words: railway ticket, image processing, Hough transform, skew correction, line fitting