DOI Department Of Electrical Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
 | norrimamokhtar@um.edu.my |
Journal articles | |
2012 |
Wan Khairunizam, Aziz Azri Abdul, Ab Shahriman, Zaaba Siti Khadijah, Ibrahim Zuwairie, Yusof Zulkifli Md, Ibrahim Ismail, Mukred Jameel Abdulla Ahmed, N Mokhtar (2012) Probability Distribution of Arm Trajectory for Motion Estimation and Gesture Recognition Advanced Science Letters 13: 1. 534-539 Abstract: In the human motion measurement, motion capture system is used to record the movement of the human body by using different types of sensors such as a magnetic position sensor, a mechanical motion detector and a vision sensor. The most challenging task in human motion measurement is to achieve the ability and reliability of a motion capture system for tracking and recognizing dynamic gestures, because human body structure has many degrees of freedom. This paper introduces a 3D motion measurement of the human upper body by using an optical motion capture system for the purpose of the estimation of human upper body motions, which is based on the probability distribution of arm trajectories. In this study, by examining the characteristic of the arm trajectory, motion features are selected and classified by using the fuzzy technique. The posture of the occluded body part is probabilistically estimated by using the aggregation of the fuzzy information of arm trajectories and the constructed human upper body model. Experimental results show that the use of the system effectively works for classifying various motion patterns and estimating the occluded posture in the motion. Notes: Export Date: 28 January 2013 Source: Scopus Language of Original Document: English Correspondence Address: Wan, K.; School of Mechatronic Engineering, Universiti Malaysia Perlis, Main Campus Ulu Pauh, 02600 Perlis, Malaysia References: Zhanli, H., Na, Z., Yang, L., Jianbao, G., Junyan, R., Qiyang, Z., Hairong, Z., (2011) Advanced Science Letters, 4, p. 2; Manresa, C., Varona, J., Mas, R., Perales, F.J., (2005) Electronic Letters on Computer Vision and Image Analysis, 5, p. 3; Stephan, J.J., Khudayer, S., (2010) International Journal of Advancements in Computing Technology, 2, p. 4; Kirishima, T., Manabe, Y., Sato, K., Chihara, K., (2010) Journal on Image and Video Processing, 10; Gutemberg, B., Guerra, F., (2005) Journal of Theoretical and Applied Informatics, 9, p. 2; Sigal, L., Balan, A., Black, M.J., Huang, J., (2010) International Journal of Computer Vision, 87, p. 1; Miyata, N., Kouchi, M., Kurihara, T., Mochimaru, M., (2004) International Conference on Intelligent Robots and Systems, , (eds.), Sendai, Japan, September-October; Butalia, A., Shah, D., Dharaskar, R.V., (2010) International Journal of Computer Applications, 1, p. 5; Manigandan, M., Jackin, I.M., (2010) International Conference on Advances in Computer Engineering, , (eds.), Bangalore, India, June; Gunes, H., Piccardi, M., (2007) Journal of Network and Computer Applications, 30, p. 4; Bevilacqua, F., Guédy, F., Schnell, N., Fléty, E., Leroy, N., (2007) International conference on New Interfaces For Musical Expression, , Eds., New York, USA, June; Sawada, H., Ukegawa, T., Benoit, E., (2004) International Workshop on Fuzzy Systems and Innovational Computing, , (eds.), Kitakyusyu, Japan, June; Wan, K., Sawada, H., (2008) International Conference on Mechatronics and Automation, , (eds.), Takamatsu, Japan, August; Wan, K., Sawada, H., (2009) SICE Journal of Control, Measurement and System Integration, 2, p. 5; Zadeh, L.A., Klir, G.J., Yuan, B., (1996) Fuzzy Sets, Fuzzy Logic, and Fuzzy Systems, , (eds.), World Scientific, Singapore
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Abstract: Because decisions made by human inspectors often involve subjective judgment, in addition to being intensive and therefore costly, an automated approach for printed circuit board (PCB) inspection is preferred to eliminate subjective discrimination and thus provide fast, quantitative, and dimensional assessments. In this study, defect classification is essential to the identification of defect sources. Therefore, an algorithm for PCB defect classification is presented that consists of well-known conventional operations, including image difference, image subtraction, image addition, counted image comparator, flood-fill, and labeling for the classification of six different defects, namely, missing hole, pinhole, underetch, short-circuit, open-circuit, and mousebite. The defect classification algorithm is improved by incorporating proper image registration and thresholding techniques to solve the alignment and uneven illumination problem. The improved PCB defect classification algorithm has been applied to real PCB images to successfully classify all of the defects. Notes: 957KT Times Cited:0 Cited References Count:14
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Abstract: Deoxyribonucleic Acid (DNA) has certain unique properties such as self-assembly and self-complementary in hybridization, which are important in many DNA-based technologies. DNA computing, for example, uses these properties to realize a computation, in vitro, which consists of several chemical reactions. Other DNA-based technologies such as DNA-based nanotechnology and polymerase chain reaction also depend on hybridization to assemble nanostructure and to amplify DNA templates, respectively. Hybridization of DNA can be controlled by properly designing DNA sequences. In this study, sequences are designed such that each sequence uniquely hybridizes to its complementary sequence, but not to any other sequences. This objective can be formulated using four objective functions, namely, similarity, H-measure, continuity, and hairpin. Binary vector evaluated particle swarm optimization (Binary VEPSO) is employed to solve the DNA sequence design problem by minimizing the objective functions subjected to two constraints: melting temperature and GC(content). Several set of good sequences are produced, which are better than other research works where only a set of sequences is generated. Notes: 963DC Times Cited:0 Cited References Count:33
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S Samsudin, S Adwan, H Arof, N Mokhtar, F Ibrahim (2012) Development of Automated Image Stitching System for Radiographic Images J Digit Imaging 1-10 Abstract: Standard X-ray images using conventional screen-film technique have a limited field of view that is insufficient to show the full bone structure of large hands on a single frame. To produce images containing the whole hand structure, digitized images from the X-ray films can be assembled using image stitching. This paper presents a new medical image stitching method that utilizes minimum average correlation energy filters to identify and merge pairs of hand X-ray medical images. The effectiveness of the proposed method is demonstrated in the experiments involving two databases which contain a total of 40 pairs of overlapping and non-overlapping hand images. The experimental results are compared with that of the normalized cross-correlation (NCC) method. It is found that the proposed method outperforms the NCC method in classifying and merging the overlapping and non-overlapping medical images. The efficacy of the proposed method is further indicated by its average execution time, which is about five times shorter than that of the other method. Notes: Samsudin, Salbiah Adwan, Somaya Arof, H Mokhtar, N Ibrahim, F ENG 2012/05/23 06:00 J Digit Imaging. 2012 May 19.
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A A Mukred Jameel, Ibrahim Zuwairie, Ibrahim Ismail, Adam Asrul, Wan Khairunizam, Yusof Zulkifli Md, N Mokhtar (2012) A Binary Particle Swarm Optimization Approach to Optimize Assembly Sequence Planning Advanced Science Letters 13: 1. 732-738 Abstract: This paper presents an approach of applying Binary Particle Swarm Optimization (BPSO) algorithm to an assembly sequence-planning (ASP) problem. Permutation encoding of sequences is used to represent particles, then those particles are strictly subjected to a precedence constraint matrix at which only the feasible sequences will be iterated in the process. An archive is used in storing the feasible sequences and a swap mechanism is used to identify the feasible sequences for iteration. As the nature of assembly sequence planning is a discrete type of problem Binary PSO technique is used. Notes: Export Date: 28 January 2013 Source: Scopus Language of Original Document: English Correspondence Address: Mukred, J. A. A.; Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia References: Liu, A., Yang, Y., Xing, Q., Yao, H., Zhang, Y., Zhou, Z., (2011) Adv. Sci. Lett., 4, p. 2180; Lv, H., Lu, C., (2010) Int. J. Adv. Manuf. Technol.; Bourjault, A., (1984), Doc. d’Etat Universite de Franche-Comte, BesanconHomem de Mello, L.S., Sanderson, A.C., (1991) IEEE Trans. Robot. Autom.; Baldwin, D.F., Abell, T.E., Lui, M.-C., de Fazio, T.L., Whitney, D.E., (1991) IEEE Trans. Robot. Autom.; Milner, J.M., Graves, S.C., Whitney, D.E., (1994) Proceedings of the IEEE International Conference on Robotics and Automation, pp. 2058-2063; Wilson, R.H., (1995) IEEE Trans. Robot. Automn., 11, p. 308; Motavalli, S., Islam, A., (1997) Computational Industrial Eng., 32, p. 743; Bonneville, F., Perrard, C., Henrioud, J., (1995) Proceeding of the IEEE Symposium on Emerging Technologies and Factory Automation, 2, pp. 231-239; Sebaaly, M.F., Fujimoto, H., (1996) Japan/USA Symposium on Flexible Automation, 2, p. 1235; Sebaaly, M.F., Fujimoto, H., (2000) IEEE Conference on Evolutionary Computation, 401; de Lit, P., Latinne, P., Rekiek, B., Delchambre, A., (2001) International Journal Production Res., 39, p. 3623; Smith(Chen), S.F., Liu, Y.J., (2002) Journal Industrial Technology, 17; Smith(Chen), S.F., (1998) Proceedings of the 24th ASME Design Automation Conference; Tseng, H.E., Li, J.D., Chang, Y.H., (2004) International Journal Prod. Res., 42, p. 2243; Marian, R.M., Luong, H.S., Abhari, K., (2006) Computational Industrial Eng., 50, p. 503; Failli, F., Dini, G., (2000) Proceedings of the 2nd CIRP International Seminar on Intelligent Computation in Manufacturing Engineering, pp. 227-232; Wang, J.F., Liu, J.H., Zhong, Y.F., (2005) International Journal Advance Manufacturing Technology, 25, p. 1137; Zhan, Z.H., Zhang, J., (2009) Applications of Evolutionary Computing, pp. 117-122. , Tubingen, Germany; Sanderson, A.C., Homem de Mello, L.S., Zhang, H., (1990) Artificial Intelligence, 11, p. 62; Eberhart, K., (2001), and Shi, Morgan Kaufmann Division of Academic PressChoi, Y.K., Lee, D.M., Cho, Y.B., (2009) Int. J. Adv. Manuf. Technol., 42, p. 180
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2011 |
T Matsumoto, T Takahashi, M Iwahashi, T Kimura, S Salbiah, N Mokhtar (2011) Visual compensation in localization of a robot on a ceiling map Scientific Research and Essays 6: 1. 131-135 Abstract: In a visual odometry system, location of a mobile robot is automatically estimated (localized) from video. When the video is captured by an "upward" camera fixed to an indoor mobile robot, a panorama image of the ceiling (ceiling map) is generated by using a visual motion between two adjacent frames in the video. Similarly, location of another robot can be estimated on the ceiling map by using a visual motion between the current frame and the previously generated ceiling map. Under the assumption that the robot goes straight or rotates around a fixed point, there is no problem on the localization as far as the floor is flat. However, when there is debris on the floor, the estimated location contains error. In this paper, we reduce this error by utilizing visual motions in video from the "forward" camera fixed to the robot. This is a visual compensation of motions in the "upward" camera’s video with those in the "forward" camera’s video. It was experimentally confirmed that the maximum absolute value of the error was reduced to approximately 11%. Notes: 729HO Times Cited:2 Cited References Count:8
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Mohd Said Suhana, Chow Chee-Onn, N Mokhtar, Ramli Rahizar, Tuan Ya Tuan Mohd Yusoff Shah, Mohd Sabri Mohd Faizul (2011) Accreditation of engineering programs : an evaluation of current practices in Malaysia International Journal of Technology and Design Education 1-16 Abstract: The curriculum for undergraduate engineering courses in Malaysia is becoming increasingly structured, following the global trend for quality assurance in engineering education, through accreditation schemes. Generally, the accreditation criteria call for the graduates from engineering programs to demonstrate a range of skills, from technical problem solving to soft skills and an aptitude for lifelong learning. In order to comply with these criteria, accreditation schemes are adopted as a quality assurance measure. This paper shall introduce the characteristics of the engineering accreditation scheme in Malaysia. The impact of the accreditation scheme on the quality of these engineering programs shall be evaluated. Data collection is in the form of benchmarking and questionnaires. The evaluation criteria shall be in terms of benefits to the institution, academic faculty, students, and the challenges encountered. A discussion on the evaluation shall include the supposed dichotomies which arise from this accreditation process, namely the compromise between research versus teaching; and the value of engineering knowledge whether as an academic pursuit or catering to industry’s needs. Ultimately, this paper shall address a fundamental question related to undergraduate teaching in engineering: whether accreditation is a necessary prerequisite in maintaining high standards in engineering programs in Malaysia. Notes: Export Date: 28 January 2013 Source: Scopus Article in Press CODEN: IJDEE Language of Original Document: English Correspondence Address: Mokhtar, N.; Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia; email: norrimamokhtar@um.edu.my
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S Rajendran, H Arof, N Mokhtar, M Mubin, S Yegappan, F Ibrahim (2011) Dual modality search and retrieval technique analysis for leukemic information system Scientific Research and Essays 6: 2. 247-255 Abstract: Medical Information System (MIS) deals with standardized method of collection, storage, retrieval and evaluation of patient data. Computational Intelligence (CI) technique has many abilities in data processing and structuring, pattern matching, forming knowledge base, reasoning and decision making. MIS for leukemia cells was developed at University of Malaya for the Hematology Department of Hospital Ampang, Malaysia. CI techniques were used for syntactical and contextual image retrieval of leukemic images. A logical approach was used to systematically develop content based image retrieval system that supports decision making in clinical hematopathology. The developed system is based on open source. Pages were designed and developed using Java Server Pages (JSP) and Java with MySQL as the database for the domain and image repository. Several Java-based tools were used for image processing, neural network based pattern classification and recognition, and for the hybrid system. The classification rates for individual white blood cells varied between 97% for training data and 95% for testing data depending on the individual cell type-monocyte, lymphocyte, eosinophil, basophil and neutrophil. This result is cross-validated by an expert hematologist. Notes: 729HU Times Cited:0 Cited References Count:16
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N Mokhtar, H Arof, F R M Adikan, M Mubin (2011) Real time noise-speech discrimination in time domain for speech recognition application Scientific Research and Essays 6: 1. 18-22 Abstract: A simple noise-speech discrimination method in time domain is presented. The random signal noise characteristics were studied in time domain. Using the characteristics information, in real time processing, a simple algorithm to detect starting and ending point of speech samples in time domain is being demonstrated. Out of 100 attempts, about 94% of successful attempts of noise-speech discrimination have been obtained with white noise background by choosing the critical thresholds values. Notes: 729HO Times Cited:0 Cited References Count:7
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2010 |
Abstract: In the SLAM (Simultaneous Localization and Mapping) technology, an environmental map is generated by a mobile robot. When it results in failure, it is necessary to inspect the scene. This localization and browsing require transmission of video signal to a remote place. In the system in this paper, an indoor mobile robot has two cameras. One is the "upward" which captures scenery of ceiling. The other is "forward" for scenery in front of the robot. Video signals from the cameras are encoded and transmitted from the robot to a remote server. It causes a problem that data size is too huge to be transmitted. To cope with this problem, the Functionally Layered Coding (FLC) was reported. In the existing FLC, visual motions are estimated by using the rotation invariant phase only correlation (RI- POC) technique. It can estimate two kinds of motions - translation and rotation. However, it requires doubled computational complexity and many components to be transmitted. In this paper, we analyze relation between kinetic movements of a robot and visual motions observed in videos, and propose to replace RI- POC by a simple POC. It was confirmed that the proposed method reduced data size for transmission to 61.6%. Notes: 729HA Times Cited:0 Cited References Count:11
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Abstract: In this paper, one dimensional image processing for eye tracking approach is presented using a low cost webcam. It was found that the algorithm is resistant to illumination variation and is able to track eyes of users with and without glasses in multiple orientations. The size and location of the region of interest (ROI), which contains both eyes, is adaptive. Derivative Dynamic Time Warping (DDTW) is chosen as the classifier for this experiment since it can match patterns from one dimension data sequences with varying length. The DDTW is applied to compare distances of the area with an offline template by investigating separately, the row arrays and column arrays for eye tracking. The online one dimensional image processing for eye tracking procedure shows good accuracy and robustness when implemented at 50 frames/s on a 253 GHz Pavilion DV4 HP notebook. Notes: 681AY Times Cited:0 Cited References Count:17
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2008 |
N Mokhtar, M Sugisaka, L T Lung, A Hamzah, M Mubin, N Md Shah (2008) Positioning and navigation of mobile robot Artificial Life and Robotics 13: 1. 255-258 Abstract: Positioning tracking is not a new idea as we have been seen from the ability of the GPS (Global Positioning System) to track the position of the object, in general with acceptable accuracy but the cost of GPS installation is expensive. However, in the case of detecting the exact position in signal-blocked closed environment (e.g. inside building, forest, mines and others); the accuracy factor provide by GPS is low. Thus, this project presents a positioning tracking system that is able to track the movement of an object within a small area or inside buildings. A complete set of the positioning tracking system consists of a pair of computer mechanical mouse and a microcontroller. From the position displayed on the computer screen, the position of the object can be located. The pair of mouse detects each movement of the object and sends the movement data to microcontroller. Linear, angular displacement and positioning calculation are also being discussed. From the results, it’s shown that the positioning system is applicable. However, some small errors are also occurred but in acceptable range. Notes: Export Date: 28 January 2013 Source: Scopus Language of Original Document: English Correspondence Address: Mokhtar, N.; Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Lembah Pantai, Kuala Lumpur, Malaysia; email: norrimamokhtar@um.edu.my References: Chenavier, F., Crowley, J., Position estimation for a mobile robot using vision and odometry (1992) Proceedings of IEEE International Conference on Robotics and Automation, pp. 2588-2593. , In: Nice, France, May 12-14; Cox, I., Blance - An experiment in guidance and navigation of an autonomous mobile robot (1991) IEEE Transactions Robotics and Automation, 7 (3), pp. 193-204; http://www.mapindia.org/2005/papers/Poster/76.htm, - (23/11/2007)http://www.sss-mag.com/apps.html, - (23/11/2007)Schiele, B., Crowley, J.L., A comparison of position estimation techniques using occupancy grids (1994) Proceedings of the IEEE International Conference on Robotics and Automation, pp. 1628-1634; Xu, Z., Chen, H., Xiang, Z., Liu, J., Position estimation for a mobile robot with augmented system state (2005) International Conference on Neural Networks and Brain, pp. 366-370; http://rossum.sourceforge.net/papers/DiffSteer/, - (23/11/2007)UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-58049217021&partnerID=40&md5=4d0400123a1c11055e4cacc255fdaae1
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Conference papers | |
2012 |
N F M Radzi, M Mubin, N A Rahim, N Mokhtar (2012) UAV collision detection algorithm design based on circle overlapping test In: 4th International Conference on Mechanical and Electrical Technology, ICMET 2012 1487-1491 Abstract: Each UAV require a robust collision detection in its operating system to ensure it can aware the potential of collision in near future. Collision detection algorithm is one of the important parts that need to be concerned in the CAS. This paper proposes a design of collision avoidance algorithm for unmanned aerial vehicle based on circle overlapping test. Assuming two moving UAV are flying in the same altitude and in straight path within a two dimensional plane as conflict problem. Both UAV are cooperative aircrafts which communication of position, heading angle, waypoint, and velocity are allowed. The proposed algorithm will determine the collision potential between the surrounding intruders according to the conflict information. Notes: Conference code: 94581 Export Date: 28 January 2013 Source: Scopus doi: 10.4028/www.scientific.net/AMM.229-231.1487 Language of Original Document: English Correspondence Address: Radzi, N. F. M.; Department of Electrical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: nfmr86@gmail.com References: Kuchar, J.K., Yang, L.C., A Review of Conflict Detection and Resolution Modeling Methods (2000) IEEE Transactions On Intelligent Transportation Systems, 1 (4), pp. 179-189. , Dec; Albaker, B.M., Rahim, N.A., Unmanned Aircraft Collision Detection and Resolution: Concept and Survey (2010) Paper Presented At 5th IEEE Conference On Industrial Electronics and Applications; Albaker, B.M., Rahim, N.A., A Conceptual Framework and a Review of Conflict Sensing, Detection, Awareness and Escape Maneuvering Methods for UAVs Aeronautics and Astronautics, , ISBN 978-953-307-473-3; Radzi, N.F.M., Mubin, M., Rahim, N.A., Ouchi, S., Kodani, N., Mokhtar, N., Collision Detection Algorithm Using Parametric Theorem (2011) Paper Presented At the International Conference On Modeling and Simulation Technology, pp. 368-373. , Tokyo, Japan, Oct; Albaker, B.M., Rahim, N.A., Unmanned Aircraft Collision Avoidance System using Cooperative Agent-Based Negotiation Approach International Journal of Simulation Systems, Science & Technology, 11 (5), pp. 1-7; Watanabe, Y., Calise, A.J., Johnson, E.N., Vision-Based Obstacle Avoidance for UAVs (2007) Paper Presented At AIAA Guidance, Navigation and Control Conference and Exhibit, , Hilton Head, South Caroline August; Kwag, Y.K., Chung, C.H., UAV based Collision Avoidance Radar Sensor Paper Presented At International Geoscience and Remote Sensing Symposium, 1 (12), pp. 639-642; Han, S.C., Bang, H., Yoo, C.S., Proportional Navigation-Based Collision Avoidance for UAVs International Journal of Control Automation and Systems, 7 (4), pp. 553-565 Sponsors: Science and Engineering Institute; Universiti Putra Malaysia
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2011 |
Abstract: This paper proposes a change point detection for electroencephalograms (EEG) signal application based on Particle Swarm Optimization (PSO). As EEG signal is well known consider as non-stationary in nature, we model the signal by using the sinusoidal-Heaviside function, which are capable to represent the change of the behavior of the signal. The parameter of the model with the change point location can be tuned by finding the minimum value of sum squared error. It was showed that the minimum value of sum squared error in the parameter tuning give the exact location of change point. The proposed method is applied to the human EEG during an eye moving task. Notes: Conference code: 85436 Export Date: 28 January 2013 Source: Scopus doi: 10.1007/978-3-642-21729-6_122 Language of Original Document: English Correspondence Address: Mohamed Saaid, M. F.; Department of Biomedical Engineering, Faculty of Enginnering, University of Malaya, Kuala Lumpur, Malaysia; email: mfms@um.edu.my References: Smith, J., Jones Jr., M., Houghton, L., Putare of health insurance (1999) N Engl J Med, 965, pp. 325-329; Tseng, S.Y., Chen, R.C., Chong, F.C., Kuo, T.S., Evaluation of parametric methods in EEG signal analysis (1995) Med Eng Phys, 17 (1), pp. 71-78; Debener, S., Ullsperger, M., Siegel, M., Engel, A.K., Single-trial EEG-fMRI reveals the dynamics of cognitive function (2006) Trends in Cognitive Sciences, 10 (12), pp. 558-563. , DOI 10.1016/j.tics.2006.09.010, PII S1364661306002725; Subasi, A., Automatic detection of epileptic seizure using dynamic fuzzy neural networks (2006) Expert Syst. Appl., 31, pp. 320-328; Shin, H.C., Jia, X., Nickl, R., Geocadin, R.G., Thakor, N.V., A subband-based information measure of EEG during brain injury and recovery after cardiac arrest (2008) IEEE Trans. Biomed. Eng., 55 (8), pp. 1985-1990; Petit, D., Gagnon, J.-F., Fantini, M.L., Ferini-Strambi, L., Montplaisir, J., Sleep and quantitative EEG in neurodegenerative disorders (2004) Journal of Psychosomatic Research, 56 (5), pp. 487-496. , DOI 10.1016/j.jpsychores.2004.02.001, PII S0022399904000182; Vaughan, T.M., Wolpaw, J.R., Donchin, E., EEG-based communication: Prospects and problems (1996) IEEE Transactions on Rehabilitation Engineering, 4 (4), pp. 425-430. , DOI 10.1109/86.547945, PII S1063652896093639; Basseville, M., Nikiforov, I.V., (1993) Detection of Abrupt Change: Theory and Applications, , Englewood Cliffs: Prentice Hall; Qin, D., A comparison of techniques for the prediction of epileptic seizures (1995) 8th IEEE Symp. Computer-Based Medical Systems, Lubbock, TX, 1995; Piryatinskaa, A., Terdikb, G., Woyczynskic, W.A., Loparod, K.A., Schere, M.S., Zlotnikf, A., Automated detection of neonate ERG sleep stages (2009) Computer Methods and Programs in Biomedicine, 95, pp. 31-46; Adak, S., Time-dependent spectral analysis of nonstationary time series (1998) J. Amer. Statist. Assoc., 93, pp. 1488-1501; Davis, R.A., Lee, T.C.M., Rodriguez-Yam, G.A., Structural break estimation for nonstationary time series models (2006) Journal of the American Statistical Association, 101 (473), pp. 223-239. , DOI 10.1198/016214505000000745; Ombao, H.C., Raz, J.A., Von, S.R., Malow, B.A., Automatic Statistical Analysis of Bivariate Nonstationary Time Series (2001) Journal of the American Statistical Association, 96 (454), pp. 543-560. , DOI 10.1198/016214501753168244; Last, M., Robert Shumway, R., Detecting abrupt changes in a piecewise locally stationary time series (2008) Journal of Multivariate Analysis, 99 (2), pp. 191-214; Kennedy, J., Eberhart, R.C., Particle Swarm Optimization (1995) Proceeding of IEEE International Conference on Neural Networks. IV. Perth, Australia, pp. 1942-1948. , Piscataway, N.J.: IEEE Service Center
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Abstract: This paper described blind user indoor environment mapping system for self-localization via webcam camera. The method used is based on robot navigation systems which capture and build panorama map of the floor. The map is then incrementally update its position as it moves throughout an environment. Image registration techniques are applied to measure translation distance and rotation angle between consecutive frames. We used Phase only correlation (POC) method to matched image differs only by a translation. For rotated image, RI-POC and Radon Transform is used to recovered rotation. The accuracy of these two methods for rotated image is compared for best result. Notes: Conference code: 86671 Export Date: 28 January 2013 Source: Scopus Art. No.: 6014943 doi: 10.1109/ICCSN.2011.6014943 Language of Original Document: English Correspondence Address: Samsudin, S.S.; Department of Electrical, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: ctsalbiah@hotmail.com References: Mokhtar, N., Arof, H., Iwahashi, M., One dimensional image processing for eye tracking using derivative dynamic time warping (2010) Scientific Research and Essays, 5 (19), pp. 2947-2952. , 4 october; Zitova, B., Flusser, I., Image registration method: A survey (2003) Image and Vision Computing, 21, pp. 977-1000; Wolberg, G., Zokai, S., Robust image registration using log-polar transform (2000) IEEE Conf. on Image Processing, , Sep; Fukutani, Y., Takahashi, T., Iwahashi, M., Kimura, T., Salbiah, S.S., Mokhtar, N., Robot vision network based on ceiling map sharing (2010) The 11th IEEE International Workshop on Advanced Motion Control, , March 21-24; Pissaloux, E., A characterization of vision systems for blind people mobility 2002 IEEE SMC; Matsumoto, T., Takahashi, T., Iwahashi, M., Kimura, T., Salbiah, S., Mokhtar, N., Visual compensation in localization of a robot on a ceiling map (2010) Scientific Reseach and Essays, 5 (23). , 4 December; Matsumoto, T., Takahashi, T., Iwahashi, M., Kimura, T., Salbiah, S., Mokhtar, N., Reduction of data size for transmission in localization of mobile robots (2010) International Journal of the Physical Sciences, 5 (15). , 4 December; Wang, J.-Z., Reinstein, L.E., Hanley, J., Meek, A.G., Investigation of a phase only correlation technique for anatomical alignment of portal image in radiation therapy (1996) Phys. Med. Biol., 41, pp. 1045-1058; Ito, K., Nakajima, H., Kobayashi, K., Aoki, T., Higuchi, T., A fingerprint matching algorithm using phase-only correlation (2004) IEICE Trans. Fundamentals, E87-A (3). , March; Tzimiropoulos, G., Stathaki, T., Robust FFT-based scale-invariant image registration 4 th SEAS DTC Technical Conferences; Xiao, S.S., Wu, Y.X., Rotation-invariant texture analysis using radon and fourier transform (2006) Journal of Physics: Conference Series, 48, pp. 1459-119; Gitlord, C.M., (2009) Low-Cost Mobile Robot Localization Using only A Download-Facing Webcam, , Technical Report October 13
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2010 |
H Yazid, H Arof, N Mokhtar (2010) Edge sharpening for diabetic retinopathy detection In: 2010 IEEE International Conference on Cybernetics and Intelligent Systems, CIS 2010 41-44 Abstract: People with diabetes may face eye problem as a complication of diabetes. These eye problems can cause vision loss and even blindness. There are several lesions that appear such microaneurysms, hemorrhages, cotton wool spots and exudates. Exudates tend to form ring, around area of diseased vessel and appeared as yellowish-white deposits with well-defined edges meanwhile cotton wool spots are grayish-white with poorly defined fluffy edges. Exudates can be highlighted from the background easier rather than cotton wool spots since it has well defined edge. In order to detect these lesions, a proper technique is needed to segment the cotton wool spots and exudates from the background. Therefore, this paper is proposed to sharpen the edge to simplify the segmentation process for cotton wool spots and exudates through ramp width reduction. © 2010 IEEE. Notes: Conference code: 81515 Export Date: 28 January 2013 Source: Scopus Art. No.: 5518585 doi: 10.1109/ICCIS.2010.5518585 Language of Original Document: English Correspondence Address: Yazid, H.; Electrical Engineering Department, University of Malaya, Kuala Lumpur, Malaysia; email: haniza.yazid@gmail.com References: Ooyub, S., Ismail, F., Daud, N.A., (2004) Diabetes Program in Malaysia-Current and Future, NCD Malaysia, 3 (2); Sanchez, C.I., Hornero, R., Lopez, M.I., Poza, J., Retinal image analysis to detec tht and quantify lesions associated with diabetic retinopathy (2004) Proc 26 IEEE Annual International Conf. on Engineering in Medicine and Biology Society (EMBC), 3, pp. 1624-1627; Li, H., Chutatape, O., A model-based approach for automated feature extraction in fundus images (2003) ICCV, pp. 394-399; Walter, T., Klein, J.C., Segmentation of color fundus images of the human retina: Detection of the optic disc and the vascular tree using morphological techniques (2001) Proceedings of the Second International Symposium: Medical Data Analysis, pp. 282-287. , Madrid, Spain October; Wang, H., Hsu, W., Goh, K.G., Lee, M.L., An effective approach to detect lesions in color retinal images (2000) Proceedings of IEEE Conference on Computer Vision and Pattern Recognition, pp. 181-186. , Hilton Head Island, USA; Sagar, A.V., Balasubramaniam, S., Chandrasekaran, V., A novel integrated approach using dynamic thresholding and edge detection(IDTED) for automatic detection of exudates in digital fundus images (2007) ICCTA, pp. 705-710; Ege, B.M., Hejlesen, O.K., Ole, V.L., Karina, M., Barry, J., David, K., Cavan, D.A., Screening for diabetic retinopathy using computer based image analysis and statistical classification (2000) Computer Methods and Programs in Biomedicine, 62 (3), pp. 165-175; Lue, J.G., Edge sharpening through ramp width reduction (2000) Image and Vision Computing, 18, pp. 501-514
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2009 |
Abstract: There are many digital electroencephalography (EEG) acquisition systems available nowadays for researchers due to the demand in the brain signal research. The electroencephalography (EEG) acquisition systems varied on the specification, design and prices. One of the ambulatory amplifiers for acquisition is the Trackit from Lifelines Limited. Presently, the Trackit system is only available for clinical applications. In order to integrate from clinical applications to research capabilities, the Trackit has to be interfaced with software that be able to do the electroencephalography (EEG) signals processing. In our project, Lab VIEW is chosen as our software platform. Therefore, we have taken the initiative to developed the software for Trackit-Lab VIEW interfaced. In this paper, we have demonstrated that the acquired electroencephalography (EEG) signals obtained using TrackitLab VIEW software. Example of signal processing application on the raw electroencephalography (EEG) signals was shown in the results section. Notes: Conference code: 79876 Export Date: 28 January 2013 Source: Scopus Art. No.: 5412072 doi: 10.1109/TECHPOS.2009.5412072 Language of Original Document: English Correspondence Address: Ramli, R.; Department of Biomedical Engineering, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia References: Whitley, K.N., Blackwell, A.F., Visual programming in the wild: A survey of LabVIEW programmers (2001) Journal of Visual Languages & Computing, 12, pp. 435-472; Tallgren, P., Vanhatalo, S., Kaila, K., Voipio, J., Evaluation of commercially available electrodes and gels for recording of slow EEG potentials (2005) Clinical Neurophysiology, 116, pp. 799-806; Kalkman, C.J., LabVIEW: A software system for data acquisition, data analysis, and instrument control (1995) Journal of Clinical Monitoring and Computing, 11, pp. 51-58; Jan Louise, A., (1999) Serial Port Complete: Programming and Circuits for RS-232 and RS-485 Links and Networks with Disk: Lakeview Research; Pfurtscheller, G., Neuper, C., Andrew, C., Edlinger, G., Foot and hand area mu rhythms (1997) International Journal of Psychophysiology, 26, pp. 121-135
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2008 |
Abstract: A new drive control system which has an effect on controlling the vehicle slip during accelerating and braking is proposed in this paper. This drive control system uses a nonlinear controller designed by following the Lyapunov theorem. The controller is designed in order that it can work at both conditions that is the slippery and non-slippery road. The effectiveness of this control system is proved by a basic experiments. Notes: Conference code: 77630 Export Date: 28 January 2013 Source: Scopus Art. No.: 4700221 doi: 10.1109/ISCIT.2008.4700221 Language of Original Document: English Correspondence Address: Mubin, M.; Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: marizan@um.edu.mv References: Iwai, Z., Inoue, A., Kawaji, S., (1985) Observer, , Corona Publishing Co. Ltd, In Japanese; O’Reilly, J., Minimal Order Observer for Linear Multivariable Systems Disturbances (1978) Int. J. Control, 28, pp. 743-751; Nagai, K., Mubin, M., Ouchi, S., Drive Control of an Electric Vehicle by a Non-linear Controller (2006) SICE 6th Annual Conference on Control System, pp. 717-720; Mubin, M., Moroda, K., Ouchi, S., Anabuki, M., Model Following Sliding Mode Control of Automobiles Using a Disturbance Observer (2003) Proc. of SICE Annual Conf, pp. 1384-1389; Unsal, C., Kachroo, P., Sliding Mode Measurement Feedback Control for Antilock Braking Systems (1999) IEEE Trans. Of Control System Tech, 7 (2), pp. 271-281; Sado, H., Sakai, S., Hori, Y., Road Condition Estimation for Traction Control in Electric Vehicle (1999) IEEE Int. Symposium on Industrial Electronics, pp. 973-978; Kawabe, T., Nakazawa, M., Notsu, I., Watanabe, Y., A Sliding Mode Controller for wheel slip ratio control system (1996) Proc. AVEC’96, pp. 797-804; Ohishi, K., Ogawa, Y., Nakano, K., Miyashita, I., Yasukawa, S., An Approach of Anti-slip Readhesion Control of Electric Motor Coach Based on First Order Disturbance Observer (2000) T. IEE Japan, 120-D (3), pp. 382-389. , In Japanese; I. Petersen, T. A Johansen, J. Kalkkuhl, J. Ludemann, Wheel Slip Control Using Gain-scheduled LQ-LPV/LMI Analysis and Experimental Results, European Control Conf. 2003UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-67549123531&partnerID=40&md5=b0d2f3fa4921f026074e9688a56514b4
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Abstract: The drive-control system of a vehicle is considered as two-inertia system that is the wheel system and the carbody system. This paper firstly presents the stabilization of two-inertia system using a non-linear controller and a disturbance observer. This control system is then applied to a drive-control system of a vehicle with a disturbance observer for estimating the car-body speed. A Lyapunov stability theorem is followed to confirm the stability of the system. The effectiveness of this control system is proved by a satisfactory experimental results. Notes: Conference code: 82300 Export Date: 28 January 2013 Source: Scopus Language of Original Document: English Correspondence Address: Mubin, M.; Department of Electrical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: marizan@um.edu.my References: Ouchi, S., Yano, K., Control of Oscillating Multi-mass system with Gear Backlash by Digital Observer (1990) T. IEE Japan, 110 D (4), pp. 410-417. , In Japanese; O’Reilly, J., Minimal Order Observer for Linear Multivariable Systems Disturbances (1978) Int. J. Control, 28, pp. 743-751; Mubin, M., Moroda, K., Ouchi, S., Anabuki, M., Model Following Sliding Mode Control of Automobiles Using a Disturbance Observer (2003) Proceeding of SICE Annual Conference, pp. 1384-1389; Unsal, C., Kachroo, P., Sliding Mode Measurement Feedback Control for Antilock Braking Systems (1999) IEEE Trans. Of Control System Tech., 7 (2), pp. 271-281; Sado, H., Sakai, S., Hori, Y., Road Condition Estimation for Traction Control in Electric Vehicle (1999) IEEE International Symposium on Industrial Electronics, pp. 973-978 Sponsors: Mitsubishi Electric Corporation Advanced Technology R and D Cent.; Oita Gas Co., Ltd.; ME System Co., Ltd.; Sanwa Shurui Co., Ltd.
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