• 1. terrain roughness: 地面粗糙度 | 地表粗糙度 | 地面粗拙度
• 2. spectrum of terrain roughness: 路面谱
• 3. Terrain fluctuation and roughness: 粗糙起伏地面

• 1.For terrain gray images, a pretreatment methodology for restraining noise and blurriness and an improved algorithm for extracting terrain roughness are given.
  针对地形灰度图像，给出一种抑制噪声模糊的图像预处理方法和改进的地形粗糙度提取算法。
  dict.yoduao.com
• 2.For elevation data, a regularized interpolation for resampling and an algorithm for extracting terrain roughness and slope with landing area plane fitting are presented.
  针对高程数据，给出一种规则化插补的重采样方法和基于着陆区平面拟合的粗糙度与坡度提取算法。
  dict.yoduao.com
• 3.The key technology is LOD algorithm. I use the view-dependent and terrain's roughness to determine the terrain detail. Before render the terrain.
  本文的关键是LOD算法，我使用了视点相关以及和地形本身起伏程度相关的技术来决定地形应有的细节程度。
  dict.yoduao.com

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