Terrain-based Adaptive Compression and Real-time Visualization

We propose a large scale terrain adaptive compression method with high compression rate in this paper by using integer wavelet transform combined with restricted quadtree triangulation based on the terrain variation characteristic. By taking advantage of the efficient computing and multi-resolution attributes of our algorithm, we can decompress the wavelet coefficients which indicate the terrain variation with multi-resolution efficiently at any viewpoint and render the terrain in real time by fast updating strategy. Simulation results demonstrate that by our method we can compress the data efficiently and render the terrain scene smoothly in real time. Keywords—integer wavelet transform, restricted quadtree triangulation, terrain compression, real-time visualization