Abdul Halim Ismail, Ts. Dr.
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/32888
This page provides access to scholarly publications by UniMAP Faculty members and researchers.2024-03-28T18:26:02ZA simple approach to determine the best threshold value for automatic image thresholding
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/35301
A simple approach to determine the best threshold value for automatic image thresholding
Abdul Halim, Ismail; Mohammad Hamiruce, Marhaban
Image thresholding is a powerful yet simple method to highlight the subject from its background in image scene analysis. Lots of methods have been proposed around the globe while some researchers regard this matter as a non-trivial problem. This paper proposes a simple approach for fast calculation of the threshold value for automatic image thresholding based on gradient analysis of the image histogram. The method manages to successfully differentiate the subject from the background. The proposed approach is validated by illustrative examples. Satisfactory results were acquired with other methods that use more complex algorithms.
Proceeding of The International Conference on Signal and Image Processing Applications, (ICSIPA09 2009) at Kuala Lumpur, Malaysia on 18 November 2009 through19 November 2009.
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2009-01-01T00:00:00ZVision-based system for line following mobile robot
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/35298
Vision-based system for line following mobile robot
Abdul Halim, Ismail; Hazwani, Ramli; Megat Mohamad Hamdan, Megat Ahmad; Mohammad Hamiruce, Marhaban
A vision based application is proposed for a line following mobile robot. A low-cost webcam is used as the sensor and the image buffers are processed via a customized image segregation method to output necessary information for the mobile robot's controller under uncontrollable lighting condition. The task is to allow the mobile robot to navigate through a predefined path marked by a white line on a dark green floor surface. Experimental results shows that the mobile robotsuccessfully able to navigate throughout the provided path. This technique is robust, reliable and easily modified for used in any other applications, such in industrial applications where costly sensors and transducers are normally used.
Proceeding of The Symposium on Industrial Electronics and Applications (ISIEA 2009) at Kuala Lumpur, Malaysia on 4 October 2009 through 6 October 2009.
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2009-01-01T00:00:00ZA Firefly Algorithm approach for routing in VLSI
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/35233
A Firefly Algorithm approach for routing in VLSI
Mohd Nasir, Ayob; Ahmad Fariz, Hassan; Abdul Halim, Ismail; Hassrizal, Hassan Basri; Muhamad Safwan, Muhamad Azmi; Amar Faiz, Zainal Abidin
Many studies had been conducted in improving the performance of large scale integration circuits that heavily depends on the interconnected routing in the circuits. Strategic choice of wire placement and buffer placement for very large scale integration (VLSI) routing can improve time delay of VLSI circuit. This paper explores the use of Firefly Algorithm in VLSI routing. The location of doglegs is employed to model the firefly that represents the routing solution. The proposed approach is then compared with previous literature for benchmarking. The result indicates that it has a good potential in VLSI routing and can be further extended in future.
Proceeding of The Symposium on Computer Applications and Industrial Electronics, (ISCAIE 2012) at Kota Kinabalu, Malaysia on 3 December 2012 through 4 December 2012.
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2012-01-01T00:00:00ZComputational fluid dynamic analysis of the effect of kink conduit in microvascular vein grafting
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34211
Computational fluid dynamic analysis of the effect of kink conduit in microvascular vein grafting
Rahman Yahya, M.N.; Shahriman Abu Bakar, Dr.; Siti Khadijah, Za'aba, Dr.; Sharifah Roohi, Syed Waseem Ahmad; Wan Khairunizam, Wan Ahmad, Dr.; Mohd Nasir, Ayob; Abdul Halim, Ismail
Arterial disease of the upper extremity is an uncommon occurance, most commonly caused by atherosclerosis. In some patients with arterial disease, surgical bypass by vein grafting or vein interposition may be performed. However, due to the length kink between the existing artery and applied vein graft or more of the length of the applied vein graft may get blocked or severely narrowed. The objective of this study is to investigate the influence of blood flow on a failed vein graft due to length kink. The 3-D computational fluid dynamic method was employed to determine pulsatile flow velocity, pulsatile pressure gradient, and wall shear stress impact on the mismatched diameter of artery-vein graft model. We expect that pulsatile flow velocity, pulsatile pressure gradient and wall shear stress impact on mismatched diameter of artery-vein graft model to behave non-hydraulically compared to an ideal length model.
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2012-01-01T00:00:00Z