Minimum entropy model can find the optimal gray space for laser line extraction. A global model named Minimum Entropy Deconvolution is established to search for the peaks which constitute the laser line. Not only does it reach a high accuracy, but also it retains the line smoothness, which the previous work often paid little attention to. Besides, this work could extract several laser lines. Ex...

A method of cloud security risk assessment based on fuzzy entropy weight is proposed. In this framework, seven aspects of cloud security risk assessment indicators are set up, include the virtualization, data security, infrastructure, applications, soft environment, cloud services and security management. The simulation results show that the fuzzy entropy weight method is effective for the clou...

Zhang in 2012 introduced a nonparametric estimator of Shannon’s entropy, whose bias decays exponentially fast when the alphabet is finite. We propose a methodology to estimate the bias of this estimator. We then use it to construct a new estimator of entropy. Simulation results suggest that this bias adjusted estimator has a significantly lower bias than many other commonly used estimators. We ...

In this paper we derive the relative per-symbol redundancy of the Rice coding algorithm, which is a widely used technique in image compression for very fast entropy coding. We show, that for some important source models, such as the two-sided geometric distribution (TSGD), the redundancy depends on the source entropy H and it tends to zero if H → ∞. The redundancy is upper bounded by 50% if H → 0.

This papers proposes a fast algorithm for estimating the mutual information, difference score function, conditional score and conditional entropy, in possibly high dimensional space. The idea is to discretise the integral so that the density needs only be estimated over a regular grid, which can be done with little cost through the use of a cardinal spline kernel estimator. Score functions are ...

Magnetic null points act as scattering centers where particles describe chaotic orbits and the mixing effect increases the kinetic entropy. In an open system where convection of particles into/from the chaos region exists, the saturation of the entropy can be avoided, and continuous dissipation is achieved. The chaos-induced collisionless resistivity of ions enables fast magnetic reconnection. ...

We numerically test the method of non-sequential recursive pair substitutions to estimate the entropy of an ergodic source. We compare its performance with other classical methods to estimate the entropy (empirical frequencies, return times, Lyapunov exponent). We considered as a benchmark for the methods several systems with different statistical properties: renewal processes, dynamical system...