THE IMPORTANCE OF THE THIRD DIMENSION
Traditional two-dimensional images are appropriate in many situations. They are excellent for displaying images and for recording, but always subject to interpretation by the human eye. For a computer, analyzing a two-dimensional picture is extremely difficult. Thus, the third dimension is needed. Imaging in 3D significantly simplifies techniques necessary for computer vision. The key to “seeing” objects is not merely to analyze colours and textures, but to segment them in terms of real-world objects and their spatial and temporal relationships in the scene. With the third dimension, a computer program can distinguish the foreground objects from the background ones. Using this knowledge, the application can interpret its surroundings.