基于轮廓草图的三维地形建模方法研究

摘要

Aiming at traditional 3D terrain modelling characteristics such as time consuming,difficult in eigenvalue extraction and poor modelling effect,we put forward the contour sketch-based improved method for 3D terrain modelling.The system analyses the geometric char-acteristics of contour with Douglas-Peucker algorithm,and denoises the reconstructed 3D terrain with Gauss high-pass filter.Experimental re-sults showed that the 3D terrain model generated by this method had good visualisation effect,and proved as well that the Douglas-Peucker al-gorithm is suitable for the analysis of outlining,decomposing and reconstructing contour,and that Gauss high-pass filter has good effect on ter-rain smoothing.%针对传统的三维地形建模耗时、提取特征值困难以及建模效果不佳的特点，提出基于轮廓草图的三维地形建模的改良方法。系统通过道格拉斯普克算法分析轮廓的几何特性，使用高斯高通滤波器对重构出三维地形进行去噪。实验结果表明该方法生成的三维地形模型有良好的可视化效果，也验证了道格拉斯-普克算法适合于分析勾勒、分解和重构轮廓，高斯高通滤波器对地形的平滑有良好的效果。