Visibility of quantization errors in reversible JPEG2000

Perceptual Criteria on JPEG2000 Quantization

The aim of this work is to explain how the Brightness Induction Wavelet Model used as a perceptual quantizer can be useful for improving a lossy compression and to introduce preliminary results. In fact, this approach consists in quantizing wavelet transform coefficients using the human visual system behavior properties. When compressing images, noise is fatal to compression performance, it can...

Quantization Watermarking in the JPEG2000 Coding Pipeline

Adaptive Quantization Visibility Caching

Ray tracing has become a viable alternative to rasterization for interactive applications and also forms the basis of most global illumination methods. However, even today’s fastest ray-tracers offer only a tight budget of rays per pixel per frame. Rendering performance can be improved by increasing this budget, or by developing methods that use it more efficiently. In this paper we propose a g...

collocation errors in translations of the holy quran

the present study aims at identifying, classifying and analyzing collocation errors made by translators of the holy quran into english.findings indicated that collocationally the most acceptablt translation was done by ivring but the least appropriate one made by pickthall.

Contribution of CIWaM in JPEG2000 Quantization for Color Images

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...