Accurate Line Detection by Adjusting Hough Transform Threshold Adaptively

-A method to adjust the Hough transform threshold automatically is proposed in this paper. Straight lines are divided into two categories, parallel lines and intersection lines. Firstly we adjust the thresh roughly depending on the number of the needed lines. Then, the thresh are transformed precisely according to different characteristics of the two kinds of straight lines . Typically, this algorithm is applied to discern the runway in the aerial images of airports and recognize the bridge. Simulation results show that the algorithm requires short time and has a good anti-noise performance. Furthermore, it can solve the problems of "false peak" and "false negative".