This paper proposed a novel algorithm to detect the contour map of tumor using bipolar incoherent image processing method. If the edges, size and location of the abnormality were detected, it would be useful in diagnosing the disease. Technique for edge detection using an acousto optic two-pupil heterodyne scanning system was proposed. Boundary extraction was discussed based on edge detection b...

A process for converting a .mp3 file of a violin melody to notated sheet music using digital signal processing is described in this work. With frequency domain analysis, the input signal was filtered with a Butterworth low pass filter to minimize background noise and higher frequencies. A rectangular window was implemented to determine the maximum frequency at each time point in the short time ...

This paper is concerned with image representation by data distributed nonuniformly and in particular with a representation scheme suitable for "area-of-interest" imaging. The class of signals under consideration, whose information density varies with position, can be represented according to a nonuniform sampling scheme. Position-varying projection operators are presented as simple low-pass fil...

Motivation • Seasonal long memory is gaining attention as a time series model in econometrics and the physical sciences. { Arteche and Robinson (2000) proposed log-periodogram regression and Gaussian semi-parametric estimation for seasonal long-memory processes. • The discrete wavelet transform (DWT) is a useful alternative to the discrete Fourier transform for the analysis and synthesis of lon...

Edges represent discontinuities of image intensity in an image. High level digital image processing such as object recognition, segmentation and robot vision depend on the accuracy of edge detection. Adding product of the detected image edge and a scaling constant k to the original image is useful for image edge enhancement for better visual perception. Numerical Experiment on high pass spatial...

We present a method to reduce the impact of source brightness fluctuations (SBFs) on spectra recorded by Fourier-transform spectrometry (FTS). Interferograms are recorded without AC coupling of the detector signal (DC mode). The SBF are determined by low-pass filtering of the DC interferograms, which are then reweighted by the low-pass, smoothed signal. Atmospheric solar absorption interferogra...

The digital all-pass filter is a computationally efficient signal processing building block which is quite useful in many signal pmcessing applications. In this tutorial paper we review the properties of digital all-pass filters, and provide a broad overview of the diversity of applications in digital filtering. Starting with the definition and basic properties of a scalar all-pass function, a ...

Earlier difficulties have been observed in generating control sequences for prosthesis as well as other applications when using biological signals such as EEG. This paper deals with a new methodology of using EEG and discriminating between close/open state of the eyes. Digitized signal of duration 3 seconds had been divided into 8 segments and a digital band pass (BP) filter (Butterworth) imple...

Introduction Physiological noise caused by ecgand/or breathing related pulsatility is known to have substantial influence on the BOLD signal [1,2]. Such effects may introduce temporal correlations that are unrelated to neuronal processes in a resting-state network analysis [3]. Various noise removal techniques have been proposed, including image-based estimation schemes [4,5] and methods that u...