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This paper presents a simple method for modeling smoke from a single view, which could preserve fine realistic look observed from different views. Thin translucent smoke, generated by cigarette, candle, joss stick et al, is the main focus of this paper. The proposed method initially computes the smoke intensity from the input key frame image, then partitions the smoke into multiple segments. For each...
In this paper, we propose a cybernetics-based model of forces that integrates personality within it, called GSCP, which can well simulate how the psychological factors impact on the behaviors of entities. The modeling is achieved by introducing a genotype sequence to embed personality of entities into behavior decision-making. In order to decide the next behavior, a decision-making mechanism called...
The 3D shape of radar beams is drawn by direct volume rendering (DVR) algorithm based on 3D texture. Two procedures based on graphical processing unit (GPU) are explored to optimize the algorithm. In order to probe into the internal details of radar beams, three volume clipping methods are proposed, geometry-guided clipping, is surface DVR and exploded view based on texture-space transformation, which...
In this paper, a fast automatic and robust image registration algorithm is presented. First, we use the Fourier transform to calculate the relative position between the input images and sort the unordered image sequence. For two images with overlap region, we detect the feature points in the part of the region in one of the image with the robust method of SIFT. According to the coordinates of the...
The virtual driving platform includes hardware and software two parts. Hardware parts refer to the manipulation of institutions such as the steering wheel, throttle and brake pedals, etc. Software parts mainly refer to the virtual traffic environment, the driver can interact with the virtual traffic environment. There are two main factors which determine the fidelity of the virtual driving environment,...
Radar network detection performance is described by radar network detection probability. This paper presents two visualization methods of multilayer is surface which is extracted from radar network data for different requirements. The first algorithm, Multilayer Pseudo-sort Algorithm, boosts up the borderline using Per-Pixel Shading, improves the performance of rendering but the quality is low. Another...
Feature visualization plays an important role in visualization of complicated flows because it can highlight the feature of the flows with a simplified representation. The traditional feature visualization methods may exact some important features in flow field imprecisely due to the lack of the knowledge and the experience of the user. This paper gives a particle-based visualization system which...
Texture feature is a measure method about relationship among the pixels in local area, reflecting the changes of image space gray levels. This paper presents a texture feature extraction method based on regional average binary gray level difference co-occurrence matrix, which combined the texture structural analysis method with statistical method. Firstly, we calculate the average binary gray level...
This paper proposes a tele-rehabilitation system based on virtual reality (VR) and haptic interaction technologies. The proposed system allows the therapist to remotely monitor the patient's rehabilitation exercise and provide force to correct the patient's movement if it is unexpected. The force is generated according to the force model defined at the server side. It is important for the therapist...
In the desktop virtual maintenance system of certain weapon, the whole interaction process is divided into pickup, drag and release three phases with common interaction devices as 2-d mouse and keyboard. As the mouse only consists of 2-d screen coordinate information and the virtual entities have 3-d world coordinate, it is necessary to put up a mapping between screen coordinate system and 3-d world...
Virtual Reality (VR) system is an effective experimental study tool within the areas of cognitive psychology, neurosciences and psychophysiology. In this study, a new VR system, called panorama manifestation (PM) system, was developed and it was compared with a regular desktop (DT) system for two experimental way finding tasks in terms of success rate (SR), completion time (CT), difficulty index (DI),...
This paper develops a multi-view stereo approach to reconstruct the shape of a 3D object from a set of Internet photos. The stereo matching technique adopts region growing approach, starting from a set of sparse 3D points reconstructed from structure-from-motion (Sfm), then propagates to the neighbouring areas by the best-first strategy, and produces dense 3D points. View selection and filter algorithms...
The scale of some datasets generated by simulations on tens of thousands of cores are gigabyte or larger per output step. It is imperative that efficient coupling of these simulations and parallel visualization. Therefore, a patch-based parallel I/O strategy has been designed and implemented in JASMIN. These programs reconstructed or developed on JASMIN can write plotting data in many files. These...
A novel framework for 3D freehand tracking is put forward in this paper. Firstly, we model and investigate this problem under our virtual assembly system (VAS), so as to decrease the arbitrariness and complexity of this issue. Secondly, we put emphasis on building cognitive and behavioral model (BM) for users in VAS. Thirdly, we research on the way to track 3D freehand based on BM. Our experimental...
A SERIES MODELS FOR RADAR DETECTION RANGE UNDER COMPLEX ELECTROMAGNETIC ENVIRONMENT WERE ESTABLISHED, INCLUDING ANTENNA GAIN, PROPAGATION IN MULTI-PATH, ATTENUATION, CLUTTERS OF RAINFALL AND SEA SURFACE, AND ACTIVE ELECTRICAL JAMMING. RADAR RANGE SIMULATION WITH VISUALIZATION IS IMPLEMENTED AND PROVIDES DIRECT IMAGE FOR TACTICAL DECISION.
As the performance-price ratio of the GPU becomes higher, lots of systems are able to accommodate more than one GPU in node. Each GPU in node can afford powerful rendering ability. It is very important to effectively organize parallel rendering pipeline to fully exploit the compute units of the system. But lots of parallel rendering systems usually join hardware rendering stage with composition stage...
With the ever-growing amount of videos on the internet, searching for desired videos in an effective and efficient way remains a challenge. In addition, repurposing videos of interest into new attractive photo/video products has been an open issue. In this paper, we propose a framework for video retrieval and repurposing by leveraging the face information in videos. Since text query cannot express...
The haptic device plays an important role in improving the immersion of a dental training system. Most existing dental simulation systems use commercial haptic devices which are not designed for meeting specific characteristics of dental operation. Furthermore, few study on the quantified requirement for haptic device in dental surgery simulation is carried out. In this paper, performance specifications...
In this paper, a parallel ray-casting volume rendering algorithm based on adaptive sampling is presented for visualizing TB-scale time-varying scientific data. The algorithm samples a data field adaptively according to its inner variation, and thus sets sampling points only in important positions. In order to integrate adaptive sampling into the parallel rendering framework, an efficient method is...
Automotive interior ergonomics analysis is an important step for its development validation in the process, which directly affects the product development cycle time and cost. In order to provide a quick and human-in-loop visibility evaluation method for style designer when designing vehicle interior, a new method is proposed based on augmented reality. In this method, firstly virtual car interior...
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