Significant progress has recently been made in lossless image compression using discrete wavelet transforms. The overall performance of these schemes may be further improved by properly designing efficient entropy coders. In this paper a new technique is introduced for the implementation of context-based adaptive arithmetic entropy coding. This technique is based on the prediction of the value ...

This paper describes the use of wavelet entropy as a feature extractor for robust classification of cracks in sewer pipe structures. Video image data was acquired using an infrared camera in an experimental sewer pipe setup. Video frames were partitioned into 64 ∗ 64 pixel sections. 1,885 ’crack’ and 1,675 ’clean’ (non-crack) sections were manually classified. Each section was transformed to a ...

Viscous resistance to changes in the volume of a gas arises when different degrees of freedom have different relaxation times. Collisions tend to oppose the resulting departures from equilibrium and, in so doing, generate entropy. Even for a classical gas of hard spheres, when the mean free paths or mean flight times of constituent particles are long, we find a nonvanishing bulk viscosity. Here...

A common statistical problem is the testing of independence of two (response) variables conditionally on a third (control) variable. In the first part of this paper, we extend Hoeffding’s concept of estimability of degree r to testability of degree r, and show that independence is testable of degree two, while conditional independence is not testable of any degree if the control variable is con...

The complexity of a signal defines the compressibility of its coefficients under appropriate basis. This relation complexity-compressibility suggests a connection between the functions used to measure both of the signal’s properties. A measure of entropy quantifies the degree of complexity of a signal. In a analogous way, a measure of (non-strict) sparsity quantifies the degree of compressibili...

Entropy coding is one of the most important techniques in video codec. Two main criteria to assess an entropy coder are coding efficiency and friendly realization characteristic. In the recent development of the H.264/AVC standard, a sophisticated entropy coder, named Context-based Adaptive Variable Length Coding (CAVLC), has been invented, which supplies higher coding efficiency than other VLC...

Performance evaluation of various organizations especially educational institutions is a very important area of research and needs to be cultivated more. In this paper, we propose a performance evaluation for educational institutions using rough set on fuzzy approximation spaces with ordering rules and information entropy. In order to measure the performance of educational institutions, we cons...

We prove the global existence and uniqueness of strong solutions for a compressible multifluid described by the barotropic Navier-Stokes equations in dim = 1. The result holds when the diffusion coefficient depends on the pressure. It relies on a global control in time of the L norm of the space derivative of the density, via a new kind of entropy. §

Entropy estimation is useful but difficult in short time series. For example, automated detection of atrial fibrillation (AF) in very short heart beat interval time series would be useful in patients with cardiac implantable electronic devices that record only from the ventricle. Such devices require efficient algorithms, and the clinical situation demands accuracy. Toward these ends, we optimi...

In this work bearing faults of a three phase induction motor are detected using the information contents of stator current. The proposed methodology is implemented by taking Wavelet transform of the three phase currents of the induction motor. Finally the diagnosis is performed by employing the Shannon Entropy of the detailed wavelet coefficients at the decided level of decomposition. The work ...