Iterated image transformation and decoding apparatus and methods

摘要

An iterated image transformation and decoding apparatus includes two polygon information generation devices (2, 3) for unscrambling an input coded bit stream, inputting aspect-ratio information, and reconstructing information for generating two different polygonal images; an image transformation and generation device (4) for mapping-transforming pixel value of an image within one of the polygons and the position of the polygon; an image memory device (5) for storing the transformed polygonal image; and a control device (6) for performing control so that the mapping transformation and generation of the polygon is iteratively processed. This makes it possible to provide a decoded image having a predetermined aspect ratio without a filtering process or the like which would otherwise be required.