This CVML Web Module focuses on 3D Imaging and its applications. Introduction to 3D Image Processing is presented first. Various 3D image/data acquisition techniques are presented, notably Active and Passive 3D shape reconstruction methods, 3D Medical Image Acquisition, 3D Image Processing and 3D Geometry (surface and volume) Modeling are treated as well. 3D Image Registration is very important in medical imaging. Finite Element Method for Stress Analysis is important in mechanical and biomedical engineering. Finally, 3D Image and Shape Compression, 3D Video Coding and Broadcasting, 3D Image and Video Quality are issues of great interest in 3D cinema and 3DTV.