In this paper, we propose a novel hash function based on irregularly decimated chaotic map. The called SHAH is two Tinkerbell maps filtered with irregular decimation rule. Exact study has been provided the scheme using distribution analysis, sensitivity static analysis of diffusion and confusion, collision analysis. experimental data show that satisfied admirable level security.

in seismic exploration studies different types of techniques are used to recognize seismic features in terms of their temporal and spatial spectra. variations in frequency content are sensitive to subtle changes in reflection information (castro de matos et al., 2003). in this study the joint time-frequency analysis is used for seismic texture recognition. discrete wavelet transform (dwt) witho...

This off-line study aims to assess the performance of five classifiers commonly used in the brain-computer interface (BCI) community, when applied to a gaze-independent P300-based BCI. In particular, we compared the results of four linear classifiers and one nonlinear: Fisher's linear discriminant analysis (LDA), stepwise linear discriminant analysis (SWLDA), Bayesian linear discriminant analys...

The non-recursive algorithm of comb filters suitable for bitserial implementation is described in this paper. It performs decimation on the oversampling delta-sigma modulator output in several stages by utilizing the commutative rule. Each stage performs very simple FIR filtering and decimates the output by a factor of 2. A novel bit-serial design based on this algorithm is then presented. It f...

It is demonstrated that decimation of the one dimensional Ising model, with periodic boundary conditions, results in a non-linear renormalisation transformation for the couplings which can lead to chaotic behaviour when the couplings are complex. The recursion relation for the couplings under decimation is equivalent to the logistic map, or more generally the Mandelbrot map. In particular an im...

Decimation and interpolation are the two basic building blocks in the multirate digital signal processing systems. As the linear canonical transform (LCT) has been shown to be a powerful tool for optics and signal processing, it is worthwhile and interesting to analyze the decimation and interpolation in the LCT domain. In this paper, the definition of equivalent filter in the LCT domain have b...

The joint probability between two binary strings of different lengths has been demonstrated as a suitable basis for a correlation attack on the shrinking generator when the decimation probability is 0.5. As an extension of this, further computer simulations have been conducted to determine whether the joint probability can be used as a basis of similar correlation attacks on irregularly clocked...

3 1 Specifications 4 1.1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 The Decimation Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3 Goal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Preconditions 6 2.1 Distortion and Distance Measurement . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Ra...

In order to preserve structural edges and shapes while simplifying the triangle mesh of man-made 3D models, we propose a new quadric error metric based on the distances between the new vertex position and the affected edges for edge collapse operations. With a 2D view sampling method, the contour and silhouette likelihood of the edges are computed, which act as the quadric’s weights during the ...

A simple and robust greedy algorithm has been proposed for efficient and quality decimation of polygonal models. The performance of a simplification algorithm depends on how the local geometric deviation caused by a local decimation operation is measured. As normal field of a surface plays key role in its visual appearance, exploiting the local normal field deviation in a novel way, a new measu...