Human Body Data Processing And 3D Model Reconstructing Based On The Technology Of 3D Non-Contact Human Body Measurement

The reconstruction of 3D human body model is the important part of non-contact body measurement. The paper's data comes from the measurement system based on the binocular stereo vision technology. These are the characteristics of data: back surfaces and front surfaces are separated; points are sparse in the vertical direction and intensive in the horizontal direction; there are nicks and some disturbed points; the distribution rule of points is rather poor. In order to reconstruct 3D human body model, this paper mainly includes the following researches:1. Preprocessing of the original data. First, match the back and front surfaces as a whole human body model by the geometrical transformation in space; second, re-position the point cloud using the methods of weighted average, minimum distance and linear interpolation between two points; then insert some points at nick part through thrice parameter spline function; finally, alter bad points that are chosen at first and fair the whole line by Laplacian algorithm. The processed data can be used to next step: reconstructing 3D human body model.2. 3D human body model reconstruction. Under the platform of VC++6.0 and with the help of OpenGL, three models are constructed: by methods of thrice parameter spline function to insert points between points in same level and different levels to construct point cloud model and curved line model; using one-to-one branching and one-to-many branching triangular-grid algorithm to construct curved surface model. The applications of these human body models in apparel industry are discussed.3. Building the level contour lines of human body model. Use the method of reconstructing contour line based on intensive point to build contour line of point cloud model; use minimum distance method to build contour line of curved line model; use the rule of connected grid to build contour line of curved surface model.The research result shows that the constructed digital human body models and the contour line can be used to calculate the human dimension and describe the human shape. This research is worth to reference for further research on non-contact body measurement.