基于连贯性的地形等高线提取方法研究

该文提出了基于地形等高线国贯性的的等高线自动识别方法，等高线连贯性和线的连贯性，点的辖 贯性是指同一条等高线上的任何一点都具有相同的标高；线的连贯性是指相邻两条等高线的高度值之差是一个常量，文中所提出的方法首先利用地识别功能得到部分显式标注的等高线的高度值，然后利用等高线的连续建立等高线之间的邻接关系，并递推计算出其余等高线的高度值，该文最后提出了几个实例用以说明该方法的有效性。

Continuity-Based Contour Line Extraction Method

In this paper, we propose a contour line extraction method based on the continuity between contour lines. According to the drawing rules, all the points on a contour line have the same altitude, and the difference between altitudes of two neighboring contour lines is constant. In our method, the altitude numbers of contour lines are picked up and recognized from a topographic image. Then the neighbor relationship of contour lines is established. From those contour lines whose altitudes have been recognized, the altitudes of other contour lines can be calculated based on the continuity. The results generated by the method on experimental drawings demonstrate the efficiency.