Abstract
In this paper, we first formulate the encoding mode selection of a multimode
image compression algorithm, which adaptively determines the encoding mode to encode a
patch of a given image as a multiple-choice knapsack problem (MCKP). Then, we present a
multimode image compression algorithm that takes advantage of the MCKP-formulated mode
selection problem and a memory-efficient implementation of the MCKP-based mode selection
algorithm. To emphasize the effect of the MCKP-based mode selection, the proposed
multimode image compression algorithm adopts encoding modes from conventional multimode
image compression algorithms. In experiments using the Kodak test image set, the
proposed algorithm outperformed benchmark algorithms by 2.6–7.8 dB in the average peak
signal-to-noise ratio when the target compression ratio is 1/6.
© 2016 IEEE
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