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A sketch-based query interface is proposed for retrieving 3D CAD models. The maximum distribution of normal vectors of a 3D model is computed to assist the PCA algorithm to normalize the pose of the 3D model, and then the outline views of the 3D model can be coordinated with the freehand sketches submitted by users. To retrieve the 3D models similar with the user sketches, an image similarity assessment...
This paper proposes a new shape signature based on D2 shape distribution for 3D shape similarity assessment and search. An efficient implementation of this signature on 3D binary image is discussed. Experimental results show that the proposed method achieves a good retrieval performance with short computation time.
Engineers and designers often need to search out similar CAD models to make reference to and reuse the previous designs. For most of CAD models, both geometrical information and topological information are important for similarity assessment. We proposed two shape signatures to describe the geometry and the topology of a CAD model respectively. A relevance feedback mechanism is introduced to combine...
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