Interactive decal compositing with discrete exponential maps
Interactive decal compositing with discrete exponential maps
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DOI：
10.1145/1179352.1141930
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发表时间：
2006-07
期刊：
影响因子：
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通讯作者：
Ryan M. Schmidt;C. Grimm;B. Wyvill
中科院分区：
文献类型：
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作者：
Ryan M. Schmidt;C. Grimm;B. Wyvill
描述了一种使用贴花对表面进行纹理化的方法，使用局部参数化将图像放置在表面上。贴花参数化是通过一种新颖的 O(N log N) 离散近似指数图生成的，只需要 Dijkstra 的图距离算法中的一个额外步骤。贴花在界面中动态合成，解决了以前工作的许多限制。图像处理、变形/特征匹配和矢量图形工具是使用直接表面交互来实现的。指数贴图可以包含孔，也可以与保角参数化相结合以减少失真。指数图近似可以在任何点集上计算，包括网格和采样隐式曲面，并且在重采样下相对稳定。当表面交互变形时，贴花会粘附在表面上，即使表面改变拓扑结构，也可以保留纹理。这些属性使指数贴图成为对动画隐式表面进行纹理化的合适方法。
A method is described for texturing surfaces using decals, images placed on the surface using local parameterizations. Decal parameterizations are generated with a novel O(N log N) discrete approximation to the exponential map which requires only a single additional step in Dijkstra's graph-distance algorithm. Decals are dynamically composited in an interface that addresses many limitations of previous work. Tools for image processing, deformation/feature-matching, and vector graphics are implemented using direct surface interaction. Exponential map decals can contain holes and can also be combined with conformal parameterization to reduce distortion. The exponential map approximation can be computed on any point set, including meshes and sampled implicit surfaces, and is relatively stable under resampling. The decals stick to the surface as it is interactively deformed, allowing the texture to be preserved even if the surface changes topology. These properties make exponential map decals a suitable approach for texturing animated implicit surfaces.