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Three-dimensional model search device and method thereof and model base generation device and method thereof

A technology of 3D model and model library, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc., and can solve the problems of limited practical application, feature extraction and model comparison, etc.

Inactive Publication Date: 2014-09-10
FUJITSU LTD
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Problems solved by technology

[0011]However, the two-dimensional image-based methods mentioned in the above-mentioned documents are time-consuming in the process of feature extraction and model comparison due to the relatively large number of images , which limits their practical application

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  • Three-dimensional model search device and method thereof and model base generation device and method thereof
  • Three-dimensional model search device and method thereof and model base generation device and method thereof
  • Three-dimensional model search device and method thereof and model base generation device and method thereof

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Embodiment Construction

[0037] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and those Restrictions may vary from implementation to implementation. Moreover, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.

[0038] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely relat...

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Abstract

The invention discloses a three-dimensional model retrieval device and its method, a model library generation device and its method. The three-dimensional model retrieval device according to the present invention includes: a model normalization unit configured to rotate and / or translate the three-dimensional model to be queried, so that the direction of the main axis of the three-dimensional model is consistent with the direction of the coordinate axis of the three-dimensional space, and the The center of gravity of the three-dimensional model is consistent with the origin of the system coordinate system; the two-dimensional image generation unit is configured to perform polygon grid projection on the three-dimensional model in the positive and negative directions of each coordinate axis of the system coordinate system, and generate multiple a two-dimensional image; a model description unit configured to generate a model descriptor of the three-dimensional model based on the two-dimensional image; and a retrieval unit configured to retrieve a model library related to the model based on the model descriptor The 3D model matches the 3D model.

Description

technical field [0001] The present invention generally relates to three-dimensional model retrieval. Specifically, the present invention relates to a two-dimensional image-based three-dimensional model retrieval device and method thereof, and a three-dimensional model library generation device and method thereof. Background technique [0002] With the advancement of 3D data acquisition, computer-aided design, and graphics hardware technology, the number of 3D models has increased dramatically, and these models are distributed on the Internet and in various specific databases. On the other hand, designing a 3D model with high precision is not only expensive but also time-consuming. Therefore, the effective use of existing models is very important, but it is a difficult task to find useful models from a large number of models. Scholars have carried out a lot of research work, dedicated to finding effective 3D model retrieval methods. [0003] At present, scholars have propo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 王月红刘汝杰于浩远藤进增本大器长田茂美
Owner FUJITSU LTD
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