%0 Conference Proceedings
%T Local Perceptual Weighting in JPEG2000 for Color Images
%A Jaime Moreno
%A Xavier Otazu
%A Maria Vanrell
%B 5th European Conference on Colour in Graphics, Imaging and Vision and  12th International Symposium on Multispectral Colour Science
%D 2010
%@ 9781617388897
%F Jaime Moreno2010
%O CIC
%O exported from refbase (http://refbase.cvc.uab.es/show.php?record=1307), last updated on Mon, 14 Jan 2019 09:04:32 +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 (Chromatic Induction Wavelet Model).
%P 255–260