Alibaba Group Holding Limited

Zhejiang University

Hao Lv

Chuanxin Sheng

Pengcheng Huang

Jianrong Tan

Zhenyu Liu

Jin Cheng

A difference analysis method for 3D CAD models based on key-point matching. According to the method, a 3D CAD model is firstly transformed into a key-point representation, then a graph representation and a graph matching method are introduced to establish a pre-matching of vertices between the two 3D CAD models, and rigid transformation parameters between the two 3D CAD models are obtained through a mismatch elimination method; and subsequently, a matching relationship of key-points is established by checking their distance after rigid transformation to obtain a key-point matching sequence for hierarchical comparison, so as to identify the differences between vertices, edges, faces and solid models, thereby quickly and accurately identifying the difference between the 3D CAD models.

Difference analysis method for 3D cad models based on key-point matching

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Generating processed web address information is disclosed, including: receiving a request to share a webpage, wherein the request includes at least a first web address information associated with the webpage and user identification information associated with a first user; generating a second web address information based at least in part on the first web address information and the user identification information associated with the first user; and presenting the second web address information.

Generating processed web address information

Growing community of inventors

Hangzhou, China

Hao Lv