Apparent ridges for line drawing
Apparent ridges for line drawing
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DOI：
10.1145/1275808.1276401
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发表时间：
2007-07
期刊：
影响因子：
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通讯作者：
Tilke Judd;F. Durand;E. Adelson
中科院分区：
文献类型：
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作者：
Tilke Judd;F. Durand;E. Adelson
可以使用各种要素线绘制三维形状，但目前的定义似乎都无法单独捕获所有视觉相关的线。我们引入了一个新的定义的特征线的基础上两个感性的意见。首先，人类感知对阴影的变化很敏感，由于形状感知受光照和反射率修改的影响很小，因此我们应该关注正常变化。第二，视图相关的线更好地传达平滑的曲面。由此，我们将与视图相关的曲率定义为表面法线相对于观看屏幕平面的变化，并将视在脊定义为使与视图相关的曲率最大化的点的轨迹。我们提出了一个形式化的定义和算法来绘制线条画的三维网格。我们表明，我们的明显的山脊包括或增强方面的其他几个功能线。
Three-dimensional shape can be drawn using a variety of feature lines, but none of the current definitions alone seem to capture all visually-relevant lines. We introduce a new definition of feature lines based on two perceptual observations. First, human perception is sensitive to the variation of shading, and since shape perception is little affected by lighting and reflectance modification, we should focus on normal variation. Second, view-dependent lines better convey smooth surfaces. From this we define view-dependent curvature as the variation of the surface normal with respect to a viewing screen plane, and apparent ridges as the loci of points that maximize a view-dependent curvature. We present a formal definition of apparent ridges and an algorithm to render line drawings of 3D meshes. We show that our apparent ridges encompass or enhance aspects of several other feature lines.