基于B样条小波多尺度分解的DEM模型研究

Digital Elevation Model Research Based on B-Spline Wavelet

将B样条小波多尺度分解的思想应用于数字高程模型(DEM)建模中,可以较好的简化数据并提高造型逼真效果。数字高程模型(DEM)建模中可以利用矢量化等高线的高程数据和B样条曲面拟合的方法,研究了B样条小波在矢量化等高线和B样条曲面中的数据压缩处理,并给出具体等高线和曲面的小波分解算法和实现结果,有效减少了等高线和B样条曲面存储所需的空间并提高了曲线曲面的光顺程度。

B-spline Wavelet multi- scale decomposition is used in multi- resolution modeling on digi- tal elevation model （DEM）, which can minimize date effectively and improve the effect of reality. The elevation date from vector contour and B- spline surface can apply to DEM, so this paper set forth the theory of B - spline wavelet multi - scale decomposition on them. A description of contour and B - spline surface on the basis of wavelet decomposition is given, and then the corresponding experiment results are provided. By this method, it is extremely useful for storage and improvement of the extent of fairing.