Now, as the amount of data increases, human ability to specify the location decreases. Thus, a system that will provide facilities to specify objects and events and will return or retrieve data corresponding to those will be much more interesting and useful to humans. At any given time, we can only see the world, or the environment, from one perspective. To acquire other perspectives, we must move our eyes. To explore the environment from other viewpoints, we have to physically move.
Cameras have similar limitations.
Thus, when a scene is captured using only one camera, the perspective is limited. One could obtain more information about the environment by panning and tilting the camera so that one could see a complete view from one position. QuickTime VR has attracted attention by providing a mechanism to record these scenes from one position and then allowing a user to view the scene in any direction, but from this viewpoint. Similar efforts are being made in many research groups by taking multiple images of a scene and then using software to merge these images to provide a larger picture than is possible from any single camera view. Using a powerful information system to mediate between viewers and multiple cameras, it is possible to provide Gestalt Vision, which is more than is possible using any individual camera.