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Block Prediction Vector Quantization for Grayscale Image Compression

Hu Y-C., Lin C-C., Chi K-L.

Fundamenta Informaticae

2007

Vol. 78, nr 2

257-270

This paper presents a new image compression scheme based on vector quantization (VQ) that exploits the inter-block and intra-block correlations in grayscale images. The similar block prediction technique is designed to encode the image blocks by their similar neighboring encoded blocks. Besides, two codebooks are used in the proposed scheme to exploit the intra-block correlation within each image block. Experimental results show that the proposed scheme not only provides good image qualities but also cuts down the required bit rates.