I. Introduction
The seven-dimensional (7-D) plenoptic function, proposed by Adelson and Bergen [1], describes the intensity of light rays passing through the center of an ideal camera at every possible location in the three-dimensional (3-D) space , at every possible angle , for every wavelength and at every time . The five-dimensional (5-D) light field video (LFV) (also known as plenoptic video) is a simplified form of the 7-D plenoptic function derived by assuming the intensity of a light ray does not change along its direction of propagation and the red, green and blue (RGB) colour components are used instead of the wavelength [2]. Ideally, an LFV of a dynamic scene in free space contains all information of the scene because it captures all the light rays emanating from the scene. This richness of information may be exploited to accomplish novel tasks that are not possible with conventional 3-D videos such as digital refocusing and depth-velocity filtering. In the next subsection, a brief review of previous work is presented.