Water pipe network is installed underground and once equipped, it is difficult to recognize the state of pipes when the leak or burst happens. Accordingly, post management is often delayed after the fault occurs. Therefore, the systematic fault management system of water pipe network is required to prevent the accident and minimize the loss. In this work, we develop online fault detection syste...

this paper presents a new coding method for image compression based on jpeg2000 and contourlet transform. jpeg2000 standard is a common standard that uses discrete wavelet transform (dwt) in the compression process. the main problems of dwt are failure to detect curved edges in image and its shortage representation of the ridge and furrow patterns which cause deficiency and block artifacts rema...

Image encryption is one of the most important techniques to maintain data confidentiality against illegal access and fraudulent usage. In this study, a new medical image technique was developed by combining discrete wavelet transform, fast Fourier Arnold two multidimensional chaotic systems. The subjected transform before magic square shuffles sub-bands. Confusion operations are performed on ea...

This paper presents a computational algorithm for identifying power frequency variations and integer harmonics by using waveletbased transform. The continuous wavelet transform (CWT) using the complex Morlet wavelet (CMW) is adopted to detect the harmonics presented in a power signal. A frequency detection algorithm is developed from the wavelet scalogram and ridges. A necessary condition is es...

In this paper we propose a new steganography technique which embeds secrete color image into color cover work in frequency domain. Unlike the spatial domain approach, secrete image or data are embedded in the low frequency coefficients resulted from Discrete Wavelet Transform, as it is much sensitive to Human Visual System several researchers are not preferring to embed data in low frequency co...

Two Pulse Shape Discrimination (PSD) techniques are proposed based on Cross Correlation (CC) and Principal Component Analysis (PCA). In CC-based PSD, two schemes are proposed to discriminate between different decay scintillation pulses. The first CC-based scheme is applied to digitized scintillation pulses in time-domain with different numbers of samples ranging from the last two samples up to ...

Image processing is a recent trend that is grabbing attention in almost all areas like space, medical, defence, authentication systems etc. ,. Discrete Fourier Transforms is one of the most used transforms in image processing. Discrete Fourier Transform helps to transform the signal from spatial domain to frequency domain which is often used for filtering, correlation analysis and spectrum anal...

This paper concerns the issue of wavelet analysis of signals by continuous and discrete wavelet transforms (CWT – Continous Wavelet Transform, DWT – Discrete Wavelet Transform). The main goal of our work was to develop a program which, through the CWT and the DWT analyses, would obtain graph of time-scale changes and would transform it into the spectrum, that is a graph of frequency changes. In...