The Terrain Multi-resolution Generation Algorithm Based on the Sound Signal Attenuation

Most MRM algorithms are based on the simplification rule of screen space error or the ratio of distance and roughness, but the rule has the disadvantage of single information and causes distortion of terrain. A new simplification rule based on sound wave propagation attenuation characteristic in underwater is proposed in the paper and a seabed terrain generating algorithm is given. The seabed regular grid data are obtained by the sound wave exploration, so we can reach the natural coupling from the data to the used simplified rule. Finally from the error analysis of the simulation result, we can see that this algorithm has the higher model precision.