The methods to obtain the Digital Terrain Model (DTM) from contour map by scan digitizing were studied.
本文还研究了通过扫描数字化等高线图建立数字地形模型的方法。
Based on theories of Computer Graphics, Digital Image Processing, Pattern Recognition and combined characteristic of geological contour-map, we present one kind of intelligent tracking algorithm.
依据计算机图形学、数字图像处理和模式识别理论，并结合地质等值线图的特点，给出了一种图像智能跟踪算法。
Then, by applying this algorithm to the picture after pretreatment, we realize its edge-detection and get vector graphical data. As a result, we solve digital problem of geological contour-map.
然后，对预处理后的图像运用此算法实现了地质等值线图的边缘探测，并得到矢量图形数据，从而解决了地质等值线图件数字化问题。
Then, by applying this algorithm to the picture after pretreatment, we realize its edge-detection and get vector graphical data. As a result, we solve digital problem of geological contour-map.
然后，对预处理后的图像运用此算法实现了地质等值线图的边缘探测，并得到矢量图形数据，从而解决了地质等值线图件数字化问题。
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