3d model retrieval method and system

A three-dimensional shape and three-dimensional technology, which is applied in the field of retrieving three-dimensional shape models, can solve the problems of incorrect comparison and huge amount of calculation

Inactive Publication Date: 2009-06-03
HITACHI LTD
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Problems solved by technology

[0008] However, in the 3D similar shape retrieval (3D model retrieval) using a 2D image, there is a problem that there are two 3D shape models that are the object of calculating the distance (dissimilarity). In the case of inconsistency, the comparison cannot be performed correctly
For this reason, there is a problem that the amount of calculation becomes huge

Method used

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Embodiment Construction

[0027] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] figure 1 It is a diagram showing a configuration example of the three-dimensional similar shape retrieval system of the present invention. This retrieval system has a registration unit 1 and a retrieval unit 2 . The registration unit 1 registers the three-dimensional shape to be searched, and registers the three-dimensional shape to the three-dimensional shape database 3 by taking the three-dimensional shape data to be searched as input. Then, the feature quantity of the three-dimensional shape to be searched is obtained and registered in the feature quantity database 4 . In addition, the details of the feature quantity of a three-dimensional shape will be mentioned later. The search unit 2 searches for similar shapes, and is connected to a three-dimensional shape database 3 and a feature database 4 . The search unit 2 receives a sh...

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Abstract

The present invention provides a 3D model retrieval system designed to extract feature vectors of 3D models to retrieve a similar model. Image feature vectors are extracted by subjecting target 3D models to rendering from various directions by using a random rotation generator and a 2D image generator. Then, the image feature vectors are registered in an image feature vectors database. Image feature vectors are extracted by subjecting a query 3D model to rendering from various directions by using another random rotation generator and another 2D image generator. The image feature vectors are compared to the contents of the image feature vectors database, thereby retrieving a 3D model.

Description

technical field [0001] The invention relates to a method and device for retrieving a three-dimensional shape model (3D model). Background technique [0002] In recent years, with the advancement of computers and networks, three-dimensional shape models have been used in various situations. On the one hand, the amount of data is increasing, and on the other hand, the demand for effective management of three-dimensional shape model data and efficient retrieval of desired shapes by users is increasing. For this reason, various methods have been proposed regarding the retrieval method of the three-dimensional shape model. As a method for retrieving a three-dimensional shape model, a method for searching by generating a two-dimensional image (2D image) from the three-dimensional shape and obtaining feature values ​​from the two-dimensional image has been proposed. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2006-277166 [0004] Patent Document 2: Japanese Patent ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F17/30256G06F16/5838
Inventor 栗原恒弥
Owner HITACHI LTD
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