A self-adaptive approach for the detection and correction of stripes in the sinogram: suppression of ring artifacts in CT imaging
The digital X-ray detectors often generate stripe artifact in the sinogram which in turn creates ring artifact in the reconstructed micro-Computed Tomography (µ-CT), C-Arm CT, and most recent dental CT images. Such ring artifacts not only obscure image ...
Short Exon detection in DNA sequences based on multifeature spectral analysis
This paper presents a new technique for the detection of short exons in DNA sequences. In this method, we analyze four DNA structural properties, which include the DNA bending stiffness, disrupt energy, free energy, and propeller twist, using the ...
Mean-square performance analysis of the family of selective partial update NLMS and affine projection adaptive filter algorithms in nonstationary environment
We present the general framework formean-square performance analysis of the selective partial update affine projection algorithm (SPU-APA) and the family of SPU normalized least mean-squares (SPU-NLMS) adaptive filter algorithms in nonstationary ...
Construction of sparse representations of perfect polyphase sequences in Zak space with applications to radar and communications
Sparse representations of sequences facilitate signal processing tasks in many radar, sonar, communications, and information hiding applications. Previously, conditions for the construction of a compactly supported finite Zak transform of the linear FM ...
Time-frequency detection of slowly varying periodic signals with harmonics: methods and performance evaluation
We consider the problem of detecting an unknown signal from an unknown noise type. We restrict the signal type to a class of slowly varying periodic signals with harmonic components, a class which includes real signals such as the electroencephalogram ...
An improved flowchart for gabor order tracking with gaussian window as the analysis window
Based on simulations on the ability of the Gaussian-function windowed Gabor coefficient spectrumto separate order components, an improved flowchart for Gabor order tracking (GOT) is put forward. With a conventional GOT flowchart with Gaussian window, ...
Multivariate empirical mode decomposition for quantifying multivariate phase synchronization
Quantifying the phase synchrony between signals is important in many different applications, including the study of the chaotic oscillators in physics and the modeling of the joint dynamics between channels of brain activity recorded by ...
A signal-specific QMF bank design technique using Karhunen-Loéve transform approximation
Block Wavelet Transforms (BWTs) are orthogonal matrix transforms that can be obtained from orthogonal subband filter banks. They were initially generated to produce matrix transforms which may carry nice properties inheriting from wavelets, as ...
Nonstationary system analysis methods for underwater acoustic communications
The underwater environment can be considered a system with time-varying impulse response, causing time-dependent spectral changes to a transmitted acoustic signal. This is the result of the interaction of the signal with the water column and ocean ...
Optimal multitaper wigner spectrum estimation of a class of locally stationary processes using hermite functions
This paper investigates the time-discrete multitapers that give a mean square error optimal Wigner spectrum estimate for a class of locally stationary processes (LSPs). The accuracy in the estimation of the time-variableWigner spectrum of the LSP is ...
Detection of bearing damage using stator current, and voltage to cancel electrical noise
This paper investigates the detection of a bearing defect in an asynchronous machine by analysing the electric signals. For this purpose, it is considered that the voltage is imposed and independent of mechanical aspect and that the mechanical defect ...
Tree image growth analysis using instantaneous phase modulation
We propose the use of Amplitude-Modulation Frequency-Modulation (AM-FM) methods for tree growth analysis. Tree growth is modeled using phase modulation. For adapting AM-FM methods to different images, we introduce the use of fast filterbank filter ...
