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Research On Acquring 3D Information Of Human Body And Virtual Try-On

Posted on:2005-12-28Degree:DoctorType:Dissertation
Country:ChinaCandidate:Z ZhuFull Text:PDF
GTID:1101360152468300Subject:Pattern Recognition and Intelligent Systems
Abstract/Summary:PDF Full Text Request
The development of modern digital garment technology has made the enterprises be ableto collect and analyze the information and requests of various customs at a low cost. Then theMass Customization can be realized by the agile and flexible production system. The MassCustomization manner will make it possible to offer each custom the individual commodityand service. When an e-business platform based on mass customization technology isestablished, the custom-oriented virtual shopping and individual fitting garment are available.At the same time, the manufacture efficiency will be improved, together with the costdecrease, so as to enhance the competition of the enterprise. Considering the actuality of domestic garment industry and the trend of the internationalgarment industry, we are developing the 3D whole body scanner on our basis. The correlativetechnologies, such as Automatic body measurement, Reconstructed 3D human body surfacemodel, and Virtual Try-On, are studied in the paper. The details are as follow: (1) The e-business platform framework on the mass customization is introduced. Thenwe discuss the survey of 3D whole body scanner, 3D body measurement based on the scanneddata sets and the Virtual Try-On simulation in and outside China. (2) To the problems in 3D body scanning, the rational design and algorithm are adoptedto achieve the 3D whole body scanning. In the design, laser stripes are projected horizontallyon the body. Then the methods of fusing the images of two cameras and integrating the datasets of scanning heads are adopted to overcome the body's occlusion so that we can get thecomplete contour lines of the body surface.The accuracy of structured light system hinges on the ability to locate the center of the laserstripe. To adapt the variation of skin and illumination, a method for detecting the center oflaser stripe based on genetic algorithm (GA) is introduced for the purpose of improving theaccuracy of the system. The mapping relationship between the images of two cameras isstudied in this paper. Based on the planar-constraint DLT model, the calibration algorithm andmapping formula for the two cameras are presented. The topological characteristic of the datasets from our 3D whole body scanner is special. First, we fit the scanned lines with B-splinein order to eliminate the sampling error and improve the accuracy. Then the curves areresampled on equidistance. Finally the corresponding scanned lines are fused by an effectiveand exact method—weighed distance method. The scanned results validate the 3D wholebody scanner design and the 3D information acquirement method. (3) The simulator of range finder based on structured light can be applied to optimaldesign and test. A simulator using the platform of Open Inventor has been proposed. Theimage sequences produced by the simulator are available in 3D reconstruction, and then the3D surface information of the subject is obtained accurately. The experimental result showsthat the simulation method is effective and feasible. And apply this simulator in the systemdesign of 3D whole body scanner. (4) A method of automatic body measurement based on segment human body data sets isproposed. First, Finding the location and direction of the subject is accomplished bycalculating moments of the data. Second, Segmenting data by algorithms of computergeometry and image process. Third, estimating the high of the landmark and finding thelandmark by local feature. At last, computing the measurement of human body by landmarks.The method accords with the requirement of human body measurement on the precision andthe accuracy. (5) The sharp of human body is complex, which has a lot of branch. The reconstructedsurface model of human body skin from the sequence of contours exists holes. The problem inconstruction of surface from contour data can be solved by the construction of Iso-surface invoxel data. The contour data in a series plans can be transformed voxel...
Keywords/Search Tags:3D Whole Body Scanner, Structured Light, Computer Simulation, Automatic Body Measurement, 3D Reconstruction, Virtual Try-On
PDF Full Text Request
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