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Li F.-X.,Intelligent Information Technology Key Laboratory of Beijing | Zhao D.,Intelligent Information Technology Key Laboratory of Beijing | Li Z.-J.,Intelligent Information Technology Key Laboratory of Beijing
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2012

In modern three-dimensional simulation system, the using of large-scale, detailed model makes the pc machine difficult to achieve real-time rendering, so a model simplification algorithm was proposed, and under the same resolution conditions, the algorithm maintained the appearance of the 3D model realistic. This algorithm based on Quadric Error Metrics, used the model surface classification, vertex normal vector offset and other constraints to achieve the desired effect. © Right. Source


Chen Y.,Intelligent Information Technology Key Laboratory of Beijing | Yang Z.,Intelligent Information Technology Key Laboratory of Beijing | Yan G.,Intelligent Information Technology Key Laboratory of Beijing | Li F.,Intelligent Information Technology Key Laboratory of Beijing
Applied Mechanics and Materials | Year: 2013

Bag of words algorithm is to integrate visual words, described the local features of the object, together to form a bag model. It does not consider the structural information of the object, considering only the local features. This paper presents an image classification algorithm based on structural information. Algorithm adds the structural information of the object according to the ideas of generalized Hough transform. We use the structural information on the local features of the test image with generalized Hough transform and get the possible position of the center of the object. Then,we have to analyze the template size on the basis of the dispersion degree of the voting points, and finally optimize the voting results. Experimental results demonstrate that our proposed method is superior to the method which does not consider the structural information and uses the low-level features to classification. © (2013) Trans Tech Publications, Switzerland. Source


Li F.-X.,Intelligent Information Technology Key Laboratory of Beijing | Rao Y.-H.,Intelligent Information Technology Key Laboratory of Beijing | Liu C.,Beijing Simulation Center | Jie F.,Intelligent Information Technology Key Laboratory of Beijing
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2012

With the continuous development of 3D scanning technology, the point cloud data is becoming more and more redundant. Storage, handling or display of these data will consume a lot of time and computer resources, so it is needed to simplify the point cloud data. A new algorithm based on normal direction was proposed. Experiments by different point cloud data using the proposed algorithm and the traditional method show that the algorithm can reserve more minutiae and remove the redundant data at the same time. Source


Li F.-X.,Intelligent Information Technology Key Laboratory of Beijing | Lu Z.-H.,Intelligent Information Technology Key Laboratory of Beijing | Lei Z.-C.,Intelligent Information Technology Key Laboratory of Beijing | Li J.,Intelligent Information Technology Key Laboratory of Beijing | Nie R.,Intelligent Information Technology Key Laboratory of Beijing
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2013

The method of aggregation and disaggregation is an essential application of multi-resolution modeling. The key issue is how to maintain the effective mapping relations between the corresponding attributes of different resolution level, which contains the rational relationship between different attributes, and consistency maintenance of attributes. Based on formation, the key attribute of formation multi-resolution models, of how to promote the reality in aggregation and disaggregation process was analyzed in the work. The dependency relationship between formation and three typical attributes: position, combat status and damage was analyzed, and by designing an additional dynamic storage structure, the necessary information for model property consistency models was reduced, and a new algorithm for the three attributes was designed. Combining the application of databases, the experiment shows the better effects on consistency maintenance between disaggregation results, namely, the enhancement of consistency. © Copyright;. Source

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