计算机地貌晕渲效果增强方法研究
Visual Effect Enhancement in Computer-Aided Hill-Shading
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摘要: 在总结传统手工晕渲经验和方法的基础上,深入分析了计算机地貌晕渲的原理,着重研究了坡度和坡向对地貌晕渲中阴影强弱和明暗程度的影响,提出了变比例调整高程和晕渲笔调调整两种方法。实验表明,利用本文方法能有效改善地貌晕渲图的三维立体视觉效果。Abstract: Analyzing the basic principle of automatic hill-shading and methods for enhancing the 3D expression of relief in traditional hill-shading,exposure and slope are considered to be important factors to the 3D expression of hill-shading.A proper change to gradient or grayness according to slope and exposure can be helpful to improve visual effect of hill-shading map.Two methods are introduced to modify gradient and grayness in computer-aided hill-shading.Practices prove that these methods are effective.