E. Reusens. Overlapped adaptive partitioning for image coding based on the theory of iterated function systems. In Proceedings of ICASSP-1994 IEEE International Conference on Acoustics, Speech and Signal Processing, Volume 5, Adelaide, 1994.
Memoryless blockwise partitioning induces blockiness artifacts highly disturbing to the human visual system. This paper presents a new partitioning with overlapped blocks in the context of image coding based on iterated transformations systems. Each block of the partition is extended by n pixels. As usual each cell is expressed as the contractive transformation of another part of the image. During the decoding, values of pixels corresponding to overlapped partitioning is embedded in a quadtree segmentation of the image support. In order to avoid blurring effects in small blocks while maintaining efficiency in bigger ones, the overlapping width n is function of the block size. Simulations show a very significant improvement of the visual quality of decoded images with no increase of the bitrate request.
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@InProceedings{Reus94a,
Author = {Reusens, E.},
Title = {Overlapped adaptive partitioning for image coding based on the theory of iterated function systems},
BookTitle = {Proceedings of ICASSP-1994 IEEE International Conference on Acoustics, Speech and Signal Processing},
Volume = {5},
Address = {Adelaide},
Year = {1994}
}