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Article is dedicated to problem of creating the geometric database of products, that required for integration CAD and PDM technologies applicable in product lifecycle management process. As example are considered agricultural machinery tools' geometric data. Cite the forms of geometric data those applying in this process and structural analysis of the cluster system's connections of the components...
To effectively reuse existing NC machining process of similar part and feature, an effective data mining approach of existing CAM models in machining process data is proposed. First, a machining feature based multilevel structured CAM model is proposed to reveal the relations between machining features and machining operations. Then, the structured machining know-how database is automatically generated...
In order to research the scattering characteristics of moving targets, a simulation method applied with quasi-static theory is proposed. Firstly, the CAD model of target is established and then the all-space static RCS database for this target is set up by electromagnetics software. Secondly, the flight track is established so that the real-time posture change can be described. The attitude angles...
Despite increasing accessibility of the 3D scanning devices, acquisition of the 2D photographs is still more widely used method to capture human faces. However, many virtual scenarios require 3D representation of the human face. We present an automatic method of the human face reconstruction from a single frontal photograph. Our approach utilizes a database of the precomputed depth images, which we...
Aiming at complex series product, the middle-structure modeling method based on features is put forward and the parametric design method is studied to realize the quick design and provide the digital model for latter simulation and manufacturing. Taking the 2K-V reducer as an example, the middle-structure model of the product is created, which can be transformed into the instance product through the...
At present, the protection, inheritation, innovation and development of intangible cultural heritage in China are facing more severe opportunities and challenges. In order to overcome the shortcomings of too rigid and conservative expression, and poor interactive of traditional digital means, the virtual reality (VR) technology is applied to the protection and inheritance of the paper-cut art in this...
In order to solve the difficult problem of splicing as a result of cylindrical distortion, this paper presents a method of image stitching of cylindrical products based on four camera calibration assessment model. The internal parameters and pose of each camera are used to correct the image by calibrating the four cameras placed in increments of 90 degrees around the cylindrical product. Further,...
Accurate visual localization is a key technology for autonomous navigation. 3D structure-based methods employ 3D models of the scene to estimate the full 6DOF pose of a camera very accurately. However, constructing (and extending) large-scale 3D models is still a significant challenge. In contrast, 2D image retrieval-based methods only require a database of geo-tagged images, which is trivial to construct...
Given a single photo of a room and a large database of furniture CAD models, our goal is to reconstruct a scene that is as similar as possible to the scene depicted in the photograph, and composed of objects drawn from the database. We present a completely automatic system to address this IM2CAD problem that produces high quality results on challenging imagery from interior home design and remodeling...
With the rapid development of Chinese society and the blend of eastern and western cultures, Chinese minority culture has been greatly affected. Due to the poor protections by traditional methods, such as pictures and videos, minority techniques are endangered. By taking advantage of virtual reality technology and using creative thinking and innovative method, the digital protection of brocade technique...
We introduce a data-driven approach to complete partial 3D shapes through a combination of volumetric deep neural networks and 3D shape synthesis. From a partially-scanned input shape, our method first infers a low-resolution – but complete – output. To this end, we introduce a 3D-Encoder-Predictor Network (3D-EPN) which is composed of 3D convolutional layers. The network is...
In this paper, we propose a discriminative keypoint selection-based 3D face recognition method that is superior to prevalent techniques in terms of both computational complexity and performance. We use the average face model (AFM) for face registration to efficiently locate the axis of symmetry in the rotated face mesh and recover a full frontal face from a 3D face model commonly corrupted due to...
The Tujia nationality's brocade (short as Tujia brocade or Xilankapu) is one of the Tujia traditional handicrafts; it has been widely used in Tujia people's daily life, especially for the people reside in the YouShui River Basin. Tujia brocade not only has many varieties, manifestations and performance styles, but also very rich design patterns, these exhibits aesthetic sentiment and national consciousness...
Computer supported cooperative work (CSCW) has been widely applied to architectural design field and it improves the collaborative quality to certain extent. For the problems such as poor flexibility and lack of initiative in current cooperative work system model and construction methods, this paper integrates the concept of Agent to design and implementation of CSCW system, to achieve more intelligent...
The active role of BIM constructing and constructed project in management are studied in this paper. Based on analysis of the main applications of BIM technology in projects full life cycle, this paper puts forward promoting application management framework of BIM in the project. It proposes various stages and nodes in constructing projects life cycle, introduces and studies methods as well as feasibility...
With the high demand, the increasing demand for large-scale construction projects, people seeking to build BIM database to achieve the conversion and sharing of building information. In this paper, based on the point cloud model BIM database, based on the point cloud model BIM database development ideas and obstacles, which can improve the accuracy of model information and make the information model...
This study use the method of Component-based Software Engineering to develop the content of game-based tourism information service. The result of this study combined with 3D VR technology to implement the indoor 3D interactive tour guide and show all the attractions information service platform of game-base culture tourism. There are eight kinds of game's templates have been built in the component...
We present a novel model-free method for online 3D semantic scene parsing from video sequences. MF3D (Model-Free 3D) is different from conventional methods for 3D scene parsing in that voxel labelling is approached via search-based label transfer instead of discriminative classification. This non-parametric approach makes MF3D easy to scale with an online growth in the database, as no model re-training...
Convolutional Neural Networks (CNNs) trained on large scale RGB databases have become the secret sauce in the majority of recent approaches for object categorization from RGB-D data. Thanks to colorization techniques, these methods exploit the filters learned from 2D images to extract meaningful representations in 2.5D. Still, the perceptual signature of these two kind of images is very different,...
A weighted version of fusion strategy is introduced for multiple biometrics that compensates the limitations impinged on single biometrics. The least intrusive facial biometrics that combines the facial behaviometrics for person identification is a new trend that needs further investigation. The aim of this study is to apply this weighted fusion scheme for our proposed bi-modal framework that uses...
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