Acquisition Of 3D Foot Shape Based On Mobile Terminal

Under the development of electronic business,acquisiting foot models plays a role in the domain of shoe making and selling.Most of the traditional algorithm about multi-view geometry need for nontrivial conditions and hypothesis.For example,some model reconstruction system requires a strong texture on models,which takes a lot of inconvenience and impedes the spread of foot model reconstruction technique.This thesis mainly concentrates on the problem of obtaining foot model based on mobile terminal and implements a system which can automatically reconstruct foot model.The main contents focused by this thesis are listed as follows:1.Considering the robustness and exact demands of input image about computer vision reconstruction algorithm,this system combines IMU sensor data with vision algorithm to calculate camera parameters.When invalid calculation occurs(because of lessness feature points or others),we take the value predicted by IMU sensor data as initial value,and generate serial of consistent equactions by combining with feature points,contour of foot,etc.2.There should be errorness between reconstructed model and real model be-cause of the existness of noise,expecially when the input image sequence have not contained the whole foot.In this case,pointcloud missing occurs in the reconsturted model.In order to solve such problems,rough model was introduced.As long as there are missing points in the reconstructed model,we compair it by using rough model as reference.Then we found an object equaction which takes distance of two respond points,normal vector,curvature,silhouette,skeleton into account.By optimizing the object equaction,points in reconstructed model were moved,rotated and scaled to obtain a complete 3D mesh model of foot.3.Based on the research achievement,a software for obtaining 3D foot model based on mobile terminal has been implemented and applied on daily life.The mian function of this software is to transfor image sequence gained by mobile terminal with IMU sensor into 3D model,and measure the relative information of foot to evaluate the accuracy of reconstruction.Finally,this thesis makes a conclution and expectation about current work.