Interactive systems using active cameras produce a large amount of image data to be processed. The task of a visual memory is to represent this data in an efficient way, thus assisting subsequent image analysis algorithms. In this paper, we extent our mosaic-based approach [2] to large scenes, where distortions occur if the camera rotation covers a wide angle. This problem can be solved by using a spherical mosaic surface. However, since most vision algorithms are designed for planar images, we propose to tile the sphere with planar patches, resulting in a mosaic polytope which we call a multimosaic. A more spacious scene can be represented by a number of such multimosaics taken from different spatial positions. If a mobile robot is used for image acquisition, the path in between can additionally be represented by manifold mosaics [3] to connect the positions.
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