%0 Conference Proceedings
%T Contribution of CIWaM in JPEG2000 Quantization for Color Images
%A Jaime Moreno
%A Xavier Otazu
%A Maria Vanrell
%B Proceedings of The CREATE 2010 Conference
%D 2010
%F Jaime Moreno2010
%O CIC
%O exported from refbase (http://refbase.cvc.uab.es/show.php?record=1308), last updated on Wed, 05 Mar 2014 15:50:14 +0100
%X The aim of this work is to explain how to apply perceptual concepts to define a perceptual pre-quantizer and to improve JPEG2000 compressor. The approach consists in quantizing wavelet transform coefficients using some of the human visual system behavior properties. Noise is fatal to image compression performance, because it can be both annoying for the observer and consumes excessive bandwidth when the imagery is transmitted. Perceptual pre-quantization reduces unperceivable details and thus improve both visual impression and transmission properties. The comparison between JPEG2000 without and with perceptual pre-quantization shows that the latter is not favorable in PSNR, but the recovered image is more compressed at the same or even better visual quality measured with a weighted PSNR. Perceptual criteria were taken from the CIWaM(ChromaticInductionWaveletModel).
%P 132–136