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Variable-Rate Vector Quantizer Design Using Genetic Algorithm
Wen-Jyi HWANG Sheng-Lin HONG
IEICE TRANSACTIONS on Information and Systems
Publication Date: 1998/06/25
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Image Processing,Computer Graphics and Pattern Recognition
genetic algorithm, vector quantization, global optimization,
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This letter presents a novel variable-rate vector quantizer (VQ) design algorithm, which is a hybrid approach combining a genetic algorithm with the entropy-constrained VQ (ECVQ) algorithm. The proposed technique outperforms the ECVQ algorithm in the sense that it reaches to a nearby global optimum rather than a local one. Simulation results show that, when applied to the image coding, the technique achieves higher PSNR and image quality than those of ECVQ algorithm.