3D Graphics Reconstruction, Compression and Animation

This work covers entire pipeline of a 3D immersive system, comprising acquistion and reconstruction of 3D objects, transforming the 3D objects into popular 3D format, compression of data with MPEG-4 compliant encoders and acquisition of animation motion data. For the acquisition part we created 3D human face object with the help of depth-field camera, in particular we used Microsoft Kinect. We process the raw data given by Kinect and transform it into a mesh, and texture it with photometric data. The reconstructed objects are quiet large in size and need to be compressed for an efficient network transmission. We encoded the objects using MPEG-4 encoder, and measured the performance of scalable mesh encoding techniques. For an interactive immersive application, motion data of player must be cap-tured, which is transmitted to remote client for playing the animation on the virtual character of player. For this purpose MPEG-4 standard defines a Bone Based An-imation to acquire and compress the motion data. We acquired the motion data of a player using a novel algorithm which is compliant to bone based animation. Our proposed approach of extracting motion data is computationally efficient.