qem-based mesh simplification with global geometry features preserved
Surface mesh simplification is popular in many applications such as medical visualization, 3-D collaborative CAD and etc. Many effective algorithms have been proposed in recent years. However, most of them paid no attention to keep the global geometry features, which in many cases influence the approximation of simplified mesh seriously. In this paper, we present a QEM (quadric error metric) based triangle mesh simplification method, which can preserve the global geometry features of the original model efficiently. After finding all global geometry features by detecting the crease angles of two connecting faces, every edge is assigned a weight according to the relationship between it and the global geometry features. Then the QEM is modified to postpone the simplification of global geometry features by adding the assigned weight to the contraction cost of every edge. Experimental results show that our method can not only preserve the global geometry features efficiently, but also produce less simplification error than traditional edge contraction method using the QEM.
mesh simplification global geometry features quadric error metric edge contraction