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A Study on the Model Optimized Methods of Polyhedral Visual Hull Based on Feature Points Matching

Author: JiangJie
Tutor: ChenGuoJun
School: China University of Petroleum
Course: Computer Science and Technology
Keywords: Real-time modeling Image feature points Polar principle Polyhedral visual hull
CLC: TP391.41
Type: Master's thesis
Year: 2010
Downloads: 29
Quote: 1
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Abstract


Video-based real-time modeling of three-dimensional images in computer vision , computer graphics and other current hot areas important research , the accuracy of real-time 3D modeling is the core issue of research in this field . By studying the visual hull polygon modeling method time , there is no use of the object image feature information to optimize the model problem . To address this issue , this paper analyzes real-time visual hull polyhedron modeling and optimization of existing methods , based on the minimal impact on the modeling of real-time , under the premise of optimizing the use of the image feature information known polyhedral visual hull , thereby obtaining a high precision model of the object . Reconstruct the three-dimensional model can be used for high-precision mixed reality interactive objects in the actual situation , telemedicine, sports and other motion capture performances . 1 presents a fast and accurate access to the adjacent image feature points corresponding method . PVH completed obtained using the initial model of the target object , the first extract the silhouette of the object in the image feature points , and calculating the image feature points corresponding to the other camera lines , by selecting the appropriate template parameters and spatial location , a search pole line matching feature points . By selecting an appropriate threshold value that determines the correspondence between the image feature point , to overcome the calculation errors. 2 In the analysis of the current variety of optimization methods , based on the proposed model based on feature points matching optimization program . Common visual area adjacent images using the feature point , using the three-dimensional geometric projection principle , calculate the feature point on the object model of the exact location . The location of these points with the triangular facets vertex processing , the formation of a number of triangular facets and opposite piece using linear interpolation method for processing, in order to achieve the proceeds of the initial model PVH modeling optimal correction . Finally, an example of the optimization methods of verification procedures , will optimize the model after the initial polyhedron visual hull algorithm to generate the target object model as well as a comparative analysis of the original target object . The results show that the algorithm to optimize the initial model the effect is more prominent , so that the optimized model more close to real objects .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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