Design And Implementation Of 3D Reconstruction System Based On Android

3D reconstruction from multiple images has always been a hot research,and with the popularity of mobile devices,mobile phones make our life and study more and more convenient,become an important part of people's life and study,how to perform 3D reconstruction via mobile equipments gets more and more attention.At present,most of the traditional 3D reconstruction software are running on the desktop side,because the3 D reconstruction needs high system performance requirements,and computing power of ordinary mobile devices is weak,so there is few real-time 3D reconstruction software running in mobile phone,it is necessary to study and implement the 3D reconstruction system based on Android.The 3D reconstruction system Based on Android consists of client and server-side two parts,the client is the Android mobile phone,the server is the web server developed by PHP.Using the phone to shoot a certain number of pictures around the object to be reconstructed,the camera's internal parameters can be directly read from the device,with the help of opencv library to run the structure from motion(SfM)algorithm to calculate the camera external parameters(the camera's external gesture);Then uploading the pictures taken by the phone and the camera's internal and external parameters to the desktop server,the desktop server will run patch-based multi-view stereo(PMVS)algorithm to get the object's dense point cloud;After that the server will run the screened poisson surface reconstruction algorithm to generate watertight surfaces which keep the details.The server will return the model file to the mobile phone,the mobile phone can read the model file through the open graphics library(OpenGL ES)and display the 3D reconstruction results.In the experiment,the simple objects and large scale scenes were taken and reconstructed to get 3D model.The experimental results show that both simple objects and large scene objects can be reconstructed in a short time,and there is little difference with the actual objects.