Abstract: Road extraction from high-resolution remote sensing images has very important significance for improving the informatization admministration level of planning, road network maintaining and navigation and traffic analyzing. Bertrand curve property is discretized, and is used to extract the road edge information from high-resolution remote sensing images. The proposed algorithm can effectively eliminate non-road edge, at the same time it can interpolate the companion line of road edge, which makes the road edge more continuous and integrated. The experiments and quantitative assessment results indicate that in comparison with the classic edge detection operators the proposed approach is more efficient.