In the paper, we present a new family of biorthogonal wavelet transforms and a related library of biorthogonal periodic symmetric waveforms. For the construction, we used the interpolatory discrete splines, which enabled us to design a library of perfect reconstruction filterbanks. These filterbanks are related to Butterworth filters. The construction is performed in a “lifting” manner. The dif...

Generally Digital Signal Processing is Mathematical manipulation of the signals. The manipulation parameters may get differ from one technique to another. In this paper IIR Butterworth filters has been designed for various orders to analyze group delay. The developed IIR filters are designed and simulated using matlab with different filter orders. The simulated results shows that IIR filters wi...

High-way tunnels play an important role in our life. It’s used to solve a lot of problems such as reducing the crowds traffic and shortening way from place another. have many forms like long tunnels, short mountain tunnels. In Yemen, there are several high-way These repeated electricity cut off collected water which result stop vehicles enter this tunnel. This paper suggests implements solution...

This paper presents the concept of time-varying Butterworth filters with linear phase response. The compensation of the phase characteristics is carried out with the aid of the phase shifter system. The paper shows that it is possible to shorten the transient state in low-pass phasecompensated analog filters by varying in time selected parameters. This paper contains simulation results of the p...

In the digital image watermarking community, developing a robust watermarking method has withdrawn attention in recent years. In this paper, robust image watermark algorithm is proposed which is based on histogram shape and Butterworth filtering that resist against geometric attack and signal processing attack by using invariance property of histogram to scaling and without exploiting robust fe...

Objective(s): The purpose of this study was to examine the optimal reconstruction parameters for brain dopamine transporter SPECT images obtained with a fan beam collimator and compare the results with those obtained by using parallel-hole collimators.Methods: Data acquisition was performed using two SPECT/CT devices, namely a Symbia T6 and an Infinia Hawkeye 4 (device A and B) equipped with fa...