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Facial aging synthesis is one of the main topics in computer graphics. This paper proposes a synthetic approach to 3D aging faces by using color Gabor wavelet and texture transplant techniques. Based on 3D aging templates, the color Gabor wavelet transform is carried out first to extract the high-frequency sub-images from the texture maps, in which is contained the texture feature of aging skin. Then...
This article establishes mine workers' safety behaviors simulation system through combines virtual reality and mining safety production. The aim is to standardize safety behavior, improve the effectiveness of safety training and accordingly reduce the accidents' occurrence in coal mine. The system is constructed by means of 3D building software. Then, an integrated development in the platform Virtools...
In this paper, we describe an approach to communicate with computers in virtual reality (VR) system, this VR system can provide an operating sequence saved in an expert database by using mouse-click event. The VR system allows supervisor to set a series of training procedures, then to test operators whether could follow operating procedures or not. Furthermore, the testing procedures are saved into...
The three dimensional stratum modeling provides important basis of analysis and policy-making in areas such as Geophysics, Petroleum, Minerals, Urban construction and so on. In this paper, we firstly propose a general flow of three dimensional stratum modeling, then research stratum partition algorithm and reconstruct the surface of three dimensional stratum model (3DSM), finally program the module...
Based on the analysis of current triangulation method, a new 3D triangulation method based on boundary extension is proposed. Binning method is first applied to reduce the original point cloud into thin data, then the triangulation processes start with selected seed triangles, the triangular meshes extend outward by continuously linking the most suitable points to them along the boundary edges of...
3D stratum can become one useful auxiliary geological tool. Based on this tool, geologist can analyze stratum more accurately and scientific. VTK is an object-oriented visualization class library. 3D stratum is interpolated with Kriging method. Faults are common geological phenomenon. In order to visualize stratum, with Faults, one new interpolation method is proposed.
Reconstructing meshes from 3D medical images is an important but complicated task, which provides a fundamental data structure for bio-medical applications. In this paper, a novel and easily implemental solution is proposed. Instead of following the popular methods, we sample on the medical images with centroidal Voronoi tessellations, and then build the Delaunay mesh from the sampled points directly...
Osteoarthritis is characterised by functional failure of synovial joints. It is directly related to degeneration and malfunction of articular cartilage. Earlier studies have reported that normal articular cartilage contains a 3D collagen network integrated with interwoven collagen bundles in the superficial zone. The collagen bundles are critical to the tensile and shearing resistance of articular...
Multi-view video is a new multimedia service which provides interactive experience and depth perception. Color variations between the camera views are necessary to be eliminated in multi-view imaging. In this paper, a dominant color tracking based color correction method for multi-view video is proposed using Kalman filter. It tracks the dominant colors by using Kalman filter to fit the color variation...
This paper expatiates on the basic concept about reverse engineering. It puts forward a new working mode which takes innovation as the core. According to 3D reconstruction of complex product as the goal, it analyzes the working process of reverse engineering. The mode and process constructs CAD solid model of complex product under universal CAD software environment and lays a good foundation for product...
In order to meet the need of interactive operation in 3D graphic systems, a hardware accelerated based algorithm for fast and dynamic generation of linear octree is proposed. In this paper, depth buffer is used to determine whether a voxel is inside or outside a 3D object. Firstly a basic algorithm which can export the codes of linear octree in order dynamically is presented. In the basic algorithm,...
The quantization process is a choice for signal after pretreatment. On the premise of guarantee of image quality, we can throw away information which has little effect on visual effect. Because quantization process is origin of information loss based on DCT coding and decoding, the quantizer is good or bad which has effect on coding efficiency and the quality of reconstructed image directly. This...
This paper presents a fast stereo algorithm for obtaining disparity maps efficiently. We use a 3D model for storing and computing the depth map. The initial matching by intensity similarity is very fast by using the computational optimization. At the improving matching reliability step, two assumptions that were originally proposed by Marr and Poggio are adopted: uniqueness and continuity. It means...
At present, the lack of emotion is very serious in E-Learning. The most learning platforms can't imitate teaching behavior of the real teacher, and can't provide the emotional communication between teachers and students, so students are easy to lose learning interest. In 3D virtual learning environment based on virtual reality, a 3D virtual teacher can imitate the figure, action, facial expression...
The facial expression generation is one of the important issues of intelligent human-machine interface. It is of great challenge due to the complexity and mutability of the human face. Image-based facial expression generation techniques inherit naturally some features of images which are beneficial to reduce complexity and improve realism of expression generation and have interested more and more...
Parallel Finite Difference Time Domain (FDTD) method has been explored over past few years because of the expensive computation needed for its application. And General Purpose Graphics Processing Units (GPGPU), especially Computer Unit Device Architecture (CUDA) model, has been offered an efficient and simple solution. This paper analyzes parallel FDTD method and CUDA architecture, presents a GPU...
After analyzing the characteristics of virtual endoscopy and volume data visualization, this paper proposes an improved volume rendering algorithm based on interactive dynamic volume rendering algorithm of perspective project volume rendering, which improves the volume rendering speed in the 3D data field of the virtual endoscopy. This algorithm adopts the dynamic data reduction technique. It automatically...
Clothes fitting simulation is of great importance in assisting online fashion shopping. Recently, human mannequin and clothes simulations have improved to the point that they can generate realistic animation of clothes in real-time. However, under the constraints of online technologies, e.g. server calculation and download speed, this function is only available with larger online retailers. With the...
Up to now, it has become a big problem for most institutions of higher learning in the experimental teaching of Industrial Engineering specialty for many apparent reasons, such as too expensive to buy logistics devices, update speed of devices getting faster and faster, too large bulk of devices to find an indoor place to settle them and so on. Therefore, a three-dimensional interactive storage laboratory...
In order to solve the problem that virtual instrument can't be reused in network 3D virtual experiment, and the development of 3D virtual experiment is very difficult and very inefficient, this paper provides a method of building independent virtual instrument based on virtual components. Through assembling of virtual instrument constructing different virtual experiment, so the virtual instrument...
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