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Articles by M.A. Mohd. Ali
Total Records ( 3 ) for M.A. Mohd. Ali
  S.E. Ghrare , M.A. Mohd. Ali , K. Jumari and M. Ismail
  Problem statement: Nowadays a large number of various medical images are generated from hospitals and medical centers with sophisticated image acquisition devices, the movement toward digital images in radiology presents the problem of how to conveniently and economically store, retrieve and transmit the volume of digital images. Thus digital image data compression is necessary in order to solve this problem. So in a wide range of medical applications such as disease diagnostic and during the compression process, the loss of information is unacceptable; hence medical images are required to be at high resolution as possible. Instead of lossy compression with relatively high compression ratio, mathematical lossless compression methods are favored in this field. Approach: In this study, an efficient new lossless image coding algorithm using a simple technique was presented. Our coding algorithm was based on pixel redundancy reduction by formulating two matrices only, which were Gray Scale Matrix (GSM) and Binary Matrix (BM). These matrices had been used for coding and decoding processes. Results: Results showed that the maximum compression ratio achieved using the proposed method was 4:1, which was more efficient than the present lossless techniques, moreover the computational complexity is greatly simplified; therefore producing very fast coding and decoding. Conclusion: This algorithm was most suitable for those images where lossy compression was avoided such as medical images used for teleradiology and other telemedicine purposed and it can be applied to other medical modalities.
  Shahad Nidhal , M.A. Mohd. Ali , A.A. Zaidan , B.B. Zaidan and Hind Najah
  This study proposed new algorithm for FHR baseline (BL) and baseline Variability (V) calculation. In this study, we present a method for estimating baseline as one of the most important features present in the (FHR) signal. An algorithm based on digital (CTG) using Math Lab programming to estimate FHR baseline and baseline variability, the research in this study rely on detection of baseline value and baseline variability which gives an indication of the fetal status and health condition. The results are compared with the opinion of experts (obstetricians) baseline and baseline variability estimation. The obtained results shows slightly difference with the expert’s opinion as a first step for further work to estimate the other parameters of the CTG.
  A.A. Alsharef , M.A. Mohd. Ali and H. Sanusi
  A new full simulation, design and verification of a Direct Digital Frequency Synthesizer (DDFS), utilizing only one quarter of a given sinusoidal wave, are presented in this study. A reduction in the size of the LUT is accomplished as the new design requires storing only a quarter of the sine wave. The Register Transfer Level (RTL) and the Gate level is implemented by the Quartus II. The Quartus II will then invoke the ModelSim Altera software to simulate the output. The DDFS consists of three major models, mainly a Phase Accumulator (PA), a Phase Register and a Look Up Table (LUT). All of the mentioned models are realized by a Verilog code. The spurious free dynamic range is achieved with a value of -73 dB using a 16 bit phase accumulator. The proposed design is verified through the application of different input frequencies and obtained results showed that output frequency is directly proportional to the tuning input frequency.
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