Deuteranomaly Studied with Four Perceptual Criteria

Deuteranomaly Studied with Four Perceptual Criteria

In the theoretical section of the present paper, we develop our view of the roles played by the perceptual criteria: indistinguishably equal, neither blue nor yellow, neither green nor red, and heterochromatically equally bright. These criteria constitute a vectorial opponent-colour space, a concept used throughout the paper. Within this framework, two new theorems on psychophysical opponent-co...

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...

Noise Reduction with Multiscale Edge Representation and Perceptual Criteria

The wavelet multiscale edge representation of signals developed by Mallat and Zhong provides a new tool for signal and image processing. We built up a tree structure of wavelet-transform(WT) maxima and developed metrics for analyzing the WT maxima tree. These metrics fall into two classes corresponding to two perceptual criteria, scaling and spatial stabilities, for discriminating features from...

Double Ionization Dynamics Studied with Four-Body Dalitz Plots

The dynamics of double ionization (DI) of helium by ion impact has attracted widespread interest in the last decades, in particular, as electron-electron correlation effects play a much more important role than in single ionization (SI). Kinematically complete studies of DI, i.e. experiments recording the full momentum vectors of all involved particles, are very demanding due to the relatively ...

Perceptual Criteria for Image Quality Evaluation