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- Ahmed S. Abutaleb
- Computer Vision, Graphics, and Image Processing
- 1989

Automatic thresholding of the gray-level values of an image is very useful in automated analysis of morphological images, and it represents the first step in many applications in image understanding. Recently it was shown that by choosing the threshold as the value that maximizes the entropy of the l-dimensional histogram of an image, one might be able to… (More)

- Ahmed S. Abutaleb, Mohamed S. Kamel
- IEEE Trans. Image Processing
- 1999

A genetic algorithm is developed to find the ridges in paper fingerprints. It is based on the fact that the ridges of the fingerprints are parallel. When scanning the fingerprint, line by line, the ideal noise-free gray level distribution should yield lines of black and white. The widths of these lines are not constant. The proposed genetic algorithm… (More)

- Ahmed S. Abutaleb
- EURASIP J. Adv. Sig. Proc.
- 2005

Stochastic calculus methods are used to estimate the instantaneous frequency of a signal. The frequency is modeled as a polynomial in time. It is assumed that the phase has a Brownian-motion component. Using stochastic calculus, one is able to develop a stochastic differential equation that relates the observations to instantaneous frequency. Pseudo-maximum… (More)

- Ahmed S. Abutaleb
- Neural Networks
- 1991

- Ahmed S Abutaleb, J Melbin
- Cardiovascular engineering
- 2010

Evaluation of the time-varying parameters (Compliance, Resistance, and Inertance) that describe the right and left ventricles has been of interest for some years. Analyses usually involve a particular assertion regarding energy contributions or of the nature of the parameters themselves. It is of interest to engage the issue with a more general approach by… (More)

- Ahmed S. Abutaleb
- IEEE Trans. Acoustics, Speech, and Signal…
- 1990

- A S Abutaleb, J Melbin, A Noordergraaf
- IEEE transactions on bio-medical engineering
- 1986

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