In this letter, we extend the known results for the QCD potential between a static quark and its antiquark by computing the two-loop corrections to the colour-octet state. PACS numbers: 12.38.Bx, 12.38.-t The QCD potential between a static quark and its antiquark has for a long time been used as a probe of the fundamental properties of the strong interactions such as asymptotic freedom and conf...

In this article, we propose a new colour image segmentation algorithm by unsupervised classification of pixels. This procedure iteratively constructs the classes by histogram multithresholding. For this purpose, the procedure selects different colour spaces in which the pixels belonging to the modes of the 1D-histograms present remarkable connectedness properties, so that each mode corresponds ...

Observer metamerism was investigated in two colour matching settings. One was the classical large-field bipartite field matching with the use of narrow-band lights. The other was the cross-media setup typical for soft-proofing, with the use of reflective stimuli and two types of computer monitors. In the first experiment, five observers made repeated maximum saturation colour matches with a 6° ...

We modify the standard Wilson action of SU(3) lattice gauge theory by adding an extra term which suppresses colour magnetic currents. We present numerical results of simulations at zero and finite temperature and show that colour magnetic currents strongly influence the confining properties of SU(3) lattice gauge theory.

This chapter presents a novel and generic framework for image segmentation using a compound image descriptor that encompasses both colour and texture information in an adaptive fashion. The developed image segmentation method extracts the texture information using low-level image descriptors (such as the Local Binary Patterns (LBP)) and colour information by using colour space partitioning. The...