Zeng Yanyang, Kang Fengju, Yang Huizhen. Fast rendering of realistic terrain based on adaptive multiple features fusion[J]. Journal of Image and Graphics, 2013, 18(6): 724-729. DOI: 10.11834/jig.20130616.
Focusing on the complex data structure of digital elevation model (DEM) and the poor rendering speed in real terrain visualization
we propose a fast rendering method based on adaptive multi-feature fusion for realistic terrains. To introduce the entropy of terrain elevation
real DEM elevation data can be extracted for generating an overall framework. According to the random midpoint displacement fractal algorithm and optimized fractal parameters
the high frequency detail can be increased. To calculate the distance threshold between the viewpoint and the terrain
this corresponds to the level of details (LOD)
so that it can achieve adaptive scheduling. Additionally
by using the uncertainty determinant factor
the characteristics of the terrain profile can be updated. Finally
the algorithm is carried out using parallel processing
taking full advantage of the graphic processing unit (GPU) for accelerating the terrain rendering. The experimental results show that the generated terrain has higher fidelity and better real-time capabilily.