A. Taleb-Ahmed

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In this paper, a methodological approach to the classification of tumour skin lesions in dermoscopy images is presented. Melanomas are the most malignant skin tumours. They grow in melanocytes, the cells responsible for pigmentation. This type of cancer is increasing rapidly; its related mortality rate is increasing more modestly, and inversely proportional(More)
In this paper, we address a performance evaluation of Time Hopping Ultra-Wideband (TH-UWB) transmission with proposed procedures, based on Pulse Position Modulation (PPM) and considering IEEE 802.15.3a Channel Models (CM1, CM2, CM3, CM4). Moreover, a Selective Rake (S-Rake) receiver is designed to counter the effects of multipath fading occurring in UWB(More)
In this paper, we studied the effects of voice codecs on remote speaker recognition system, considering three types of speech codec: PCM, DPCM and ADPCM conforming to International Telecommunications Union-Telecoms (ITU-T) recommendation used in telephony and VoIP (Voice over Internet Protocol). To improve the performance of speaker recognition in a noisy(More)
– In the field of medical diagnostics, interested parties have resorted increasingly to medical imaging. It is well established that the accuracy and completeness of diagnosis are initially connected with the image quality, but the quality of the image is itself dependent on a number of factors including primarily the processing that an image must undergo(More)
In this paper, we evaluate the performance of BCH (Bose-Chaudhuri-Hocquenghem) correcting codes when used to protect data over a land mobile channel using OFDM (Orthogonal Frequency Division Multiplexing) modulation. To deal with memory channels, the Gilbert-Elliott (GE) model was considered to simulate a Rayleigh fading channel and BCH codes to analyse the(More)
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