- 26 July Corridor
Sheikh Zayed
Mahmoud Allam
The American University In Cairo, Continuing Education, Department Member
With an increasing emphasis on security, automated personal identification based on biometrics has been receiving extensive attention over the 1990s. Iris recognition, as an emerging biometric recognition approach is becoming a very... more
With an increasing emphasis on security, automated personal identification based on biometrics has been receiving extensive attention over the 1990s. Iris recognition, as an emerging biometric recognition approach is becoming a very active topic in both research and practical applications. Iris recognition is the process of recognizing a person by analyzing the apparent pattern of his or her iris. A
Research Interests:
In this paper, a wavelet based approach to the detection of anomalies in an image is described. In this approach, the anomalies are detected through hypothesis tests on the wavelet coefficients of the input image. In the development of... more
In this paper, a wavelet based approach to the detection of anomalies in an image is described. In this approach, the anomalies are detected through hypothesis tests on the wavelet coefficients of the input image. In the development of this approach, some results on the ...
Research Interests:
Modeling and simulation are becoming extensively used in embedded and Real-Time Systems (RTSs) development throughout the development life-cycle, from the system-level design space exploration to the fine grained time analysis and... more
Modeling and simulation are becoming extensively used in embedded and Real-Time Systems (RTSs) development throughout the development life-cycle, from the system-level design space exploration to the fine grained time analysis and evaluation of the system and even its components performance. At the core of these systems lies the processor which has been also the center of attention for most of the modeling and simulation efforts related to RTS simulation. Although the temporal accuracy of such models and simulators is of critical importance for Real-Time (RT) applications, it is not yet mature how this accuracy can be expressed and assessed to enable correct design decisions making during the different development phases to satisfy the RTS requirements. In this paper, we present a robust methodology for temporal accuracy assessment of any processor's simulator through its bus transactions logged on a cycle accurate basis. The proposed methodology suggests projection of RTS requi...
Research Interests:
... Permissions & Reprints. Techniques in array processing by means of transformations. Alireza Moghaddamjoo a and Mahmoud Allam a. a University of Wisconsin-Milwaukee Department of Electrical Engineering and Computer... more
... Permissions & Reprints. Techniques in array processing by means of transformations. Alireza Moghaddamjoo a and Mahmoud Allam a. a University of Wisconsin-Milwaukee Department of Electrical Engineering and Computer Science PO Box 784-Milwaukee, WI 53201. ...
Research Interests:
Research Interests:
Phase aberration due to tissues with inhomogeneous acoustic speeds is a major source for image degradation in medical ultrasound. In most phased array pulse-echo ultrasound systems, the delay used to steer and focus the beams are... more
Phase aberration due to tissues with inhomogeneous acoustic speeds is a major source for image degradation in medical ultrasound. In most phased array pulse-echo ultrasound systems, the delay used to steer and focus the beams are calculated assuming constant speed. In practice, however, the acoustic speed varies for di#erent types of tissue. In this paper, we present a method to estimate the phase errors between the elements of a linear array, based on signal representation in the spatial-temporal Fourier domain. Compared to the standard cross correlation methods used for time delay estimation, the proposed technique shows better performance. 1. INTRODUCTION The correction of phase errors due to propagation in inhomogeneous media has been the focus of a lot of research in medical ultrasound. These phase errors a#ect the quality of the images. In particular, the point spread function is broadened which lowers the resolution and blurs the image. In coherent imaging systems using linea...
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Most audio recordings are in the form of a 2-channel stereo recording while new playback sound systems make use of more loudspeakers that are designed to give a more spatial and surrounding atmosphere that is beyond the content of the... more
Most audio recordings are in the form of a 2-channel stereo recording while new playback sound systems make use of more loudspeakers that are designed to give a more spatial and surrounding atmosphere that is beyond the content of the stereo recording. Hence, it is essential to extract more spatial information from stereo recording in order to reach an enhanced upmixing techniques. One way is by extracting the primary/ambient sources. The problem of primary-ambient extraction (PAE) is a challenging problem where we want to decompose a signal into a primary (direct) and ambient (surrounding) source based on their spatial features. Several approaches have been used to solve the problem based mainly on the correlation between the two channels in the stereo recording. In this paper, we propose a new approach to decompose the signal into primary and ambient sources using Principal Component Analysis (PCA) with an adaptive weighting based on the level of correlation between the two channe...
Page 1. 25th NATIONAL RADIO SCIENCE CONFERENCE (NRSC 2008) C17 1 March 18-20, 2008, Faculty of Engineering, Tanta Univ., Egypt ــــــــــــــــــــــــــــــــــــــــــــــــــــــــ... more
Page 1. 25th NATIONAL RADIO SCIENCE CONFERENCE (NRSC 2008) C17 1 March 18-20, 2008, Faculty of Engineering, Tanta Univ., Egypt ــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ...
Research Interests: Mathematics, Data Compression, Watermarking, Digital Watermarking, Image compression, and 14 moreQuantization, Image Watermarking, Spread Spectrum, Decoding, Robustness, Spread Spectrum Communication, Direct Sequence Spread Spectrum Cdma, Scs, Digital System Testing, Copyright Protection, Discrete Cosine Transforms, Digital Watermark, Ss, and System testing
Research Interests:
Extracting spatial information from an audio recording is a necessary step for upmixing stereo tracks to be played on surround systems. One important spatial feature is the perceived direction of the different audio sources in the... more
Extracting spatial information from an audio recording is a necessary step for upmixing stereo tracks to be played on surround systems. One important spatial feature is the perceived direction of the different audio sources in the recording, which determines how to remix the different sources in the surround system. The focus of this paper is the separation of two types of audio sources: primary (direct) and ambient (surrounding) sources. Several approaches have been proposed to solve the problem, based mainly on the correlation between the two channels in the stereo recording. In this paper, we propose a new approach based on training a neural network to determine and extract the two sources from a stereo track. By performing a subjective and objective evaluation between the proposed method and common methods from the literature, the proposed approach shows improvement in the separation accuracy, while being computationally attractive for real-time applications.
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... in an image by wavelet analysis. Author(s): Mahmoud Allam; Jun Zhang. Quantifying features in the dynamic spectra of radio pulsars: localization of fringe features using wavelet transforms. Author(s): Roger S. Foster; Steven ...
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Page 1. PHASE ABERRATION CORRECTION FOR ULTRASOUND IMAGING IN TEMPORAL-SPATIAL FREQUENCY DOMAIN Mahmoud E. Allam and James F. Greenleaf Biodynamics Research Unit, Department of Physiology ...
Research Interests:
In this paper, a wavelet based approach to the detection of anomalies in an image is described. In this approach, the anomalies are detected through hypothesis tests on the wavelet coefficients of the input image. In the development of... more
In this paper, a wavelet based approach to the detection of anomalies in an image is described. In this approach, the anomalies are detected through hypothesis tests on the wavelet coefficients of the input image. In the development of this approach, some results on the ...
Research Interests:
Modeling and simulation are becoming extensively used in embedded and Real-Time Systems (RTSs) development throughout the development life-cycle, from the system-level design space exploration to the fine grained time analysis and... more
Modeling and simulation are becoming extensively used in embedded and Real-Time Systems (RTSs) development throughout the development life-cycle, from the system-level design space exploration to the fine grained time analysis and evaluation of the system and even its components performance. At the core of these systems lies the processor which has been also the center of attention for most of the modeling and simulation efforts related to RTS simulation. Although the temporal accuracy of such models and simulators is of critical importance for Real-Time (RT) applications, it is not yet mature how this accuracy can be expressed and assessed to enable correct design decisions making during the different development phases to satisfy the RTS requirements. In this paper, we present a robust methodology for temporal accuracy assessment of any processor's simulator through its bus transactions logged on a cycle accurate basis. The proposed methodology suggests projection of RTS requi...
Research Interests:
Modeling and simulation are becoming extensively used in embedded and Real-Time Systems (RTSs) development throughout the development life-cycle, from the system-level design space exploration to the fine grained time analysis and... more
Modeling and simulation are becoming extensively used in embedded and Real-Time Systems (RTSs) development throughout the development life-cycle, from the system-level design space exploration to the fine grained time analysis and evaluation of the system and even its components performance. At the core of these systems lies the processor which has been also the center of attention for most of
Research Interests:
A new method for the estimation of the direction of arrival (DOA) of correlated wideband signals received by an array of sensors uses 2-D directive filtering in the time-space domain. This results in selecting bins at different... more
A new method for the estimation of the direction of arrival (DOA) of correlated wideband signals received by an array of sensors uses 2-D directive filtering in the time-space domain. This results in selecting bins at different frequencies from signals arriving from different directions. Since signals at different frequencies are uncorrelated, any spectral estimator can then be used to estimate
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Absfruct- This paper compares the set of features offered by JPEG 2000, the new IS0 / ITU-T standard for still image coding and the popular JPEG. The study concentrates on functionality set, while addressing other aspects such as Region... more
Absfruct- This paper compares the set of features offered by JPEG 2000, the new IS0 / ITU-T standard for still image coding and the popular JPEG. The study concentrates on functionality set, while addressing other aspects such as Region of Interest coding (ROI), superior low bit rate performance, and memory requirements. Also, compressed image quality is evaluated using various algorithms.
Research Interests:
Research Interests:
Phase aberration due to tissues with inhomogeneous acoustic speeds is a major source for image degradation in medical ultrasound. In most phased array pulse-echo ultrasound systems, the delay used to steer and focus the beams are... more
Phase aberration due to tissues with inhomogeneous acoustic speeds is a major source for image degradation in medical ultrasound. In most phased array pulse-echo ultrasound systems, the delay used to steer and focus the beams are calculated assuming constant speed. In practice, however, the acoustic speed varies for different types of tissue. We present a method of estimating the phase errors between the elements of a linear array, based on signal representation in the spatial-temporal Fourier domain. Compared to the standard cross-correlation methods used for time delay estimation, the proposed technique shows better performance
Research Interests:
... Permissions & Reprints. Techniques in array processing by means of transformations. Alireza Moghaddamjoo a and Mahmoud Allam a. a University of Wisconsin-Milwaukee Department of Electrical Engineering and Computer... more
... Permissions & Reprints. Techniques in array processing by means of transformations. Alireza Moghaddamjoo a and Mahmoud Allam a. a University of Wisconsin-Milwaukee Department of Electrical Engineering and Computer Science PO Box 784-Milwaukee, WI 53201. ...
Research Interests:
Page 181. TWO-DIMENSIONAL FREQUENCY DOMAIN PHASE ABERRATION CORRECTION Mahmoud E. Allam and James F. Greenleaf Biodynaniics Research Unit Department of Physiology & Biophysics Mayo Clinic/Foundation ...
Page 1. 25th NATIONAL RADIO SCIENCE CONFERENCE (NRSC 2008) C17 1 March 18-20, 2008, Faculty of Engineering, Tanta Univ., Egypt ــــــــــــــــــــــــــــــــــــــــــــــــــــــــ... more
Page 1. 25th NATIONAL RADIO SCIENCE CONFERENCE (NRSC 2008) C17 1 March 18-20, 2008, Faculty of Engineering, Tanta Univ., Egypt ــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ...
Research Interests: Data Compression, Watermarking, Digital Watermarking, Image compression, Quantization, and 12 moreImage Watermarking, Spread Spectrum, Decoding, Robustness, Spread Spectrum Communication, Direct Sequence Spread Spectrum Cdma, Scs, Digital System Testing, Copyright Protection, Discrete Cosine Transforms, Digital Watermark, and Ss
Page 1. A Secure Face Verification System Based on Robust Hashing and Cryptography Eman A. Abdel-Ghaffar ∗, Mahmoud E. Allam , Hala AK Mansour ∗, and MA Abo-Alsoud ∗Communications and Electronics Dept. ...
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Page 1. A Secure Face Recognition System Eman A. Abdel-Ghaffar ∗ , Mahmoud E. Allam , Hala AK Mansour ∗ , and MA Abo-Alsoud ∗ Communication and Electronic Dept. Benha University Email: emaneng1@yahoo.com ...
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... Ahmed A. Morgan aahmorgangyahoo.com Mahmoud E. Allam May A. Salama Hala AK Mansour Facuilty ofEngineering at Shoubra, Benha ... to existing problems by employing core extensions like Thumb, Enhanced Digital Signal Processor (DSP), and... more
... Ahmed A. Morgan aahmorgangyahoo.com Mahmoud E. Allam May A. Salama Hala AK Mansour Facuilty ofEngineering at Shoubra, Benha ... to existing problems by employing core extensions like Thumb, Enhanced Digital Signal Processor (DSP), and Jazelle java machine. ...
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Page 1. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL, VOL. 43, NO. 5, SEPTEMBER 1996 91 1 Isomorphism Between Pulsed-Wave Doppler Ultrasound and Direction-of-Arrival Estimation-Part I: Basic Principles ...
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Research Interests:
Abstract-A new approach for high-resolution direction-of-arrival (DOA) estimation of coherent wideband signals is pro-posed. The approach is based on the projection of the two-dimensional spatial-temporal DFT of the received signal. The... more
Abstract-A new approach for high-resolution direction-of-arrival (DOA) estimation of coherent wideband signals is pro-posed. The approach is based on the projection of the two-dimensional spatial-temporal DFT of the received signal. The pro-jections are used to construct ...