计算机应用 ›› 2018, Vol. 38 ›› Issue (6): 1755-1759.DOI: 10.11772/j.issn.1001-9081.2017112816

• 虚拟现实与多媒体计算 • 上一篇    下一篇

阶层式三维形状环特征提取方法

左向梅1, 贾丽姣1, 韩鹏程2   

  1. 1. 中国飞行试验研究院 试验机设计改装研究部, 西安 710089;
    2. 西北工业大学 航空学院, 西安 710072
  • 收稿日期:2017-11-30 修回日期:2018-01-03 出版日期:2018-06-10 发布日期:2018-06-13
  • 通讯作者: 左向梅
  • 作者简介:左向梅(1990-),女,陕西蒲城人,工程师,硕士,主要研究方向:计算机图形图像处理、模式识别、人工智能;贾丽姣(1990-),女,陕西韩城人,工程师,硕士,主要研究方向:计算机视觉、图像处理;韩鹏程(1991-),男,江苏泰州人,博士研究生,主要研究方向:计算机视觉、图形图像处理、机器学习。
  • 基金资助:
    国家自然科学基金资助项目(61573284)。

Hierarchical three-dimensional shape ring feature extraction method

ZUO Xiangmei1, JIA Lijiao1, HAN Pengcheng2   

  1. 1. Experimental Aircraft Design and Modification Institute, Chinese Flight Test Establishment, Xi'an Shaanxi 710089, China;
    2. School of Aeronautics, Northwestern Polytechnical University, Xi'an Shaanxi 710072, China
  • Received:2017-11-30 Revised:2018-01-03 Online:2018-06-10 Published:2018-06-13
  • Supported by:
    This work is partially supported by the National Natural Science Foundation of China (61573284).

摘要: 针对已有的三维形状局部特征属性单一及缺乏空间结构信息的问题,提出了一种融合三维形状拓扑连接信息的阶层式特征提取框架,并得到具有平移不变性的三维形状环特征。首先,以三维形状底层特征提取为基础,进一步利用等测地线环的方式对特征点的局部区域进行建模,抽象出包含丰富空间几何结构信息的中层特征;然后,利用稀疏编码方式对中层特征进一步概括抽象,进而得到更具区分力和丰富信息的高层特征。将该高层特征与已有的尺度不变的热核描述子(SI-HKS)在三维形状对应和形状检索这两类任务中进行对比,该特征准确率分别提高了24.5个百分点和7.2个百分点。实验结果表明所提特征相较于已有的特征描述符具有更高的分辨率和识别度。

关键词: 三维形状, 局部特征, 稀疏编码, 拓扑连接, 形状检索

Abstract: The existing three-dimensional shape local features are mostly lack of spatial structure information and only contain a single property. In order to solve the problems, a hierarchical feature extraction framework integrating topological connection information of three-dimensional shape was proposed to obtain the three-dimensional shape ring feature with shift invariance. Firstly, based on the low-level feature extraction of a three-dimensional shape, the local region of feature points was modeled by the way of the isometric geodesic ring, which could extract the middle-level feature containing rich spatial geometric structure information. Then, the middle-level feature was further abstracted by using sparse coding to obtain more discriminative high-level feature with abundant information. The obtained high-level feature was compared with the existing Scale Invariant Heat Kernel Signature (SI-HKS) in two tasks of three-dimensional shape correspondence and shape retrieval, and its accuracy was increased by 24.5 percentage points and 7.2 percentage points respectively. The experimental results show that the proposed feature has higher resolution and recognition than the existing feature descriptors.

Key words: three-dimensional shape, local feature, sparse coding, topological connection, shape retrieval

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