Research and implementation of 3D reconstruction base on multi-contours

3D Reconstruction often faces to a serial of 2D contour lines but not to volume data, which as we often processed, so study of 3D reconstruction based on multi-contours has important practical values. In the process of 3D-reconstruction based on multi-contours, contours correspondence, contours splicing, branch problem, and terminal contours closing are all its key technologies. In this paper we give the concrete solutions on every step of 3D construction of multi-contours. According to winding issue of contours we provide means of gauging sum of angles of contour's edges adjacent to each other, which avoided error judging of winding of contours. As to branch issue of one contour corresponding to several contours, we give the way of splitting contour based on ratio in circumference of corresponding contours. We also give the mean of maximal field angle to reduce the calculation time on triangulating terminal contours. The solution we provided can give correct result of contours splicing under any kind of contours. It proves that every step of the solution is correct and effective. The solutions we designed are more general than other solutions.