M. A. Ashour

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Real time face recognition systems have become an area of growing interest due to its wide area of applications. This paper exploits the energy compaction property of the wavelet transform to provide a high performance face recognition system using the PCA and ZM techniques on fused and DWT approximation sub band images. The experimental results indicate(More)
Infrared (IR) Face recognition has become an area of growing interest since it can operate in dim light and total darkness. This paper introduces a comparative study between the infrared face recognition systems using the principle component analysis (PCA) and the Zernike moments (ZM) techniques. The performance is evaluated according to the recognition(More)
In positron emission tomography (PET) scanners, the depth of interaction (DOI) is a great interest research area. To gain the DOI information, different pulse shape discrimination (PSD) techniques are used for crystal-identification of phoswich detectors. This paper evaluates two recent PSD algorithms due to their discrimination performance of two different(More)
Content-Based Image Retrieval (CBIR) considers the characteristics of the image itself, for example its shapes, colors and textures. The Current approaches to CBIR differ in terms of which image features are extracted. Recent work deals with combination of distances or scores from different and independent representations. Content-based image retrieval has(More)
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(More)
The absorption of radiation in multicrystal PET detectors results in different decay-time pulses. The differences between these pulse decay time constants are used to discriminate between different scintillator materials. In this paper, pulse shape discrimination (PSD) techniques based on the discrete sine transform (DST) and discrete cosine transform (DCT)(More)
A way to get the depth of interaction (DOI) information in a positron emission tomography (PET) scanner is the use of phoswich detectors. The layer of interaction is identified from the pulse shape of the corresponding scintillator material. In this work, wavelets based pulse shape discrimination (PSD) were investigated in order to find a best practical(More)
Temperature is one of the basic components of the weather. In this paper, mean temperature have been forecasted using Artificial Neural Network (ANN). The design of the ANN based on four weather parameters. The ANN design has been applied for Cairo city, the capital of Egypt. The training and testing used meteorological data for twenty years (19962016). In(More)
In this paper, regular and non-multiplicative mapping algorithms between different types of Generalized Discrete Fourier Transform (GDFT) are proposed. The proposed mapping algorithms are used to build regular and real twiddle factors FFT algorithms. It presents a more regular FFT than that recently presented GDFT type-I, which in addition requires log(More)
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