A New Method of Extracting Terrain Feature Lines by Morphology

There are some fast and effective methods related to image processing technique.But they are unsatisfactory in resisting the noise and in reducing the redundant information.For this situation,a new method of extracting terrain feature lines is proposed by the mathematical morphology.Considering the characteristics of the ridges and valleys,two kinds of operators are designed by basic morphological operation.Then the new method is built on the operators with iterative forms.The experimental results show that the ridge-lines and valley-lines extracted by the method fit the real terrain.And it can resist some small-scale noise.