Abstract:Because of the slow detection speed and occupying big system memory for lines in digitial images, a new improved detection method was proposed. Firstly, sampling in half was used to extract process the image, adopted the strategy that from probably to accurate tese, reduce the computational complexity.Then, the soble operator was proceeded on edge detection. Finally, increased the edge gradient on the classical hough transform to reduce the number of coordinate transformation, and joined up the disconnected line.