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Signal Processing and its Applications (CSPA), 2011 IEEE 7th International Colloquium on

Date 4-6 March 2011

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Displaying Results 1 - 25 of 108
  • [Front cover]

    Publication Year: 2011 , Page(s): c1
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  • [Copyright notice]

    Publication Year: 2011 , Page(s): ii
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  • Organizing committee

    Publication Year: 2011 , Page(s): iii
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  • Reviewers

    Publication Year: 2011 , Page(s): iv
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  • Table of contents

    Publication Year: 2011 , Page(s): v - xii
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  • Recurrent adaptive neuro-fuzzy inference system for steam temperature estimation in distillation of essential oil extraction process

    Publication Year: 2011 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (877 KB) |  | HTML iconHTML  

    In this paper, recurrent adaptive neuro-fuzzy inference system (RANFIS) structure has been proposed to solve approximation problem in identifying a global model of steam temperature of packed distillation column in steam distillation essential oil extraction process. The input-output data is acquired from field experimentation via MATLAB Real-time Workshop (RTW) integrated to the plant. The derived RANFIS model is optimized in order to get the optimum ANFIS structure that includes the optimal number of membership function, fuzzy rules, data selection, epoch which gives low computation time and root means squared error (RMSE). Several experiments were carried out using both pseudo random binary sequence (PRBS) and noise as perturbation signals. Performance comparison of RANFIS with ARX model shows that RANFIS identification gives an excellent global modeling method with RMSE of 0.1778 and consumed less computation or training time. View full abstract»

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  • An observation of noise intervention into acoustic emission signal on concrete structure

    Publication Year: 2011 , Page(s): 7 - 10
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (514 KB) |  | HTML iconHTML  

    This paper is presented the observation of noise intervention into acoustic emission (AE) signal on reinforced concrete beam based on data recorded in the AEWin software at different pre-set thresholds manually. Two kinds of sources were selected; namely in-plane source and out-plane source. The correlation between threshold levels and number of hits has been observed. It can be concluded that for both AE sources in-plane and out of plane at the lower threshold level, huge hits were produced which including unwanted hits as well as noise. At high threshold level only required data / hits were recorded by AE signals, where the data presented owing to sudden release of stress from pencil lead fracture at selected source location. Thus, it produced lower correlation between threshold levels and a total number of hits recorded as the coefficient of determination for both sources is around 0.8 only and the graph produced is not linear. View full abstract»

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  • A texture-based approach for content based image retrieval system for plant leaves images

    Publication Year: 2011 , Page(s): 11 - 14
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (450 KB) |  | HTML iconHTML  

    Image identification of plant leaves based on human vision is difficult task as well as plant identification based on keywords retrieval. It requires the domain knowledge in the botanist field. This work proposes the image texture analysis using Discrete Wavelet Transformation (DWT) and combined with an entropy measurement to identify a query image to one of seven classes that consists of 280 plant leaves images. The experimental results show that the proposed method yields higher correctness retrieval accuracy rate which reaches up to 92% compared to the Gray Level Co-occurrence Matrix (GLCM) that gives 49.28%. View full abstract»

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  • Overview of moment tensor analysis of acoustic emission signal in evaluation concrete structure

    Publication Year: 2011 , Page(s): 15 - 18
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (657 KB) |  | HTML iconHTML  

    This paper is present a review on the evaluation of concrete structure damage by utilizing the moment tensor analysis (MTA) of acoustic emission (AE) source technique. In general moment tensor analysis is concerning the quantitative information on kinematics of cracks according to the AE source. This concept of AE analysis has been developed and mostly applied in reinforced concrete structure. Furthermore, the formulation of the evaluation of MTA is divided to a three different parts which are; namely kinematics crack, crack classification and crack volume. All these kinds of formulation have been established and proved by the previous researches. This paper also provides a brief overview of research work and several research papers on these topics were cited. Finally, this paper concluded with a discussion for future research area. View full abstract»

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  • An investigation on acoustic wave velocity of reinforced concrete beam in-plane source

    Publication Year: 2011 , Page(s): 19 - 22
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (585 KB) |  | HTML iconHTML  

    This paper is presented an investigation on acoustic wave velocity of reinforced concrete beam in-plane source based on AE waveform analysis. Pencil Lead Fracture (PLF) was used to generate sudden release of stress at selected source location. Three threshold levels were considered for determining wave velocity in RC beam. It can be concluded that the wave velocity was dependent to the threshold levels, high threshold level would prolong the TOA of the wave and the velocity would be reduced; which the wave travels in the RC beam at velocities in the range 2410 m/s to 4000 m/s. The wave velocity also decreased as the distance from individual sensor to synchronize sensors increased. View full abstract»

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  • Simple GUI design for monitoring of a remotely operated quadrotor unmanned aerial vehicle (UAV)

    Publication Year: 2011 , Page(s): 23 - 27
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (844 KB) |  | HTML iconHTML  

    This paper describes the process of designing a GUI (Graphical user interface) for a remotely operated quadrotor UAV. In the process of building this quadrotor project, SolidWork 2009 software was used to develop the prototype before the actual model is made. An IMU sensor is used to measure the orientation of the quadrotor which is processed by a microcontroller to indicate the current orientation of the quadrotor before being transmitted to ground station wirelessly. The data received by the PC at the ground station then is shown on the graphical user interface (GUI) developed. The data flows from the microcontroller to the PC and the function used in the LabVIEW software is also discussed in this paper. View full abstract»

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  • A simple approach on implementing IMU sensor fusion in PID controller for stabilizing quadrotor flight control

    Publication Year: 2011 , Page(s): 28 - 32
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1031 KB) |  | HTML iconHTML  

    This paper discussed about a simple approach for implementing well-known PID controller in microcontroller for quadrotor project. This controller will be used for stabilizing the quadrotor while in flight. Towards to stabilize this type of air craft, sensors must be used as the feedback for PID controller. A new method in sensor fusion and inclination angle estimation is discussed in this paper. A simple system architecture for controlling four motors also included as a reference for the flow of the programming sequence. Single axis test has been done with result to prove this method and discussed in this paper. View full abstract»

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  • Full reference image quality metrics and their performance

    Publication Year: 2011 , Page(s): 33 - 38
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (853 KB) |  | HTML iconHTML  

    This paper mainly aims to study the performance of objective assessment methods of image quality. It take into consideration the correlations between each objective assessment and the subjective assessment in order to determine objective test performance. Three objective assessment methods used in this study are the Structural Similarity (SSIM) index, the Peak Signal-to-Noise Ratio (PSNR) and the Mean Squared Error (MSE) calculating algorithm. The resulting data indicate what type of objective assessment was most suitable for which type of impairment imposed upon an image. This is clarified using the Pearson Correlation Coefficient as described in the paper. As an overall, SSIM index had the best correlation characteristics to the subjective assessment, followed by the MSE calculating algorithm. From this study, a better understanding of the requirements for developing an efficient image quality assessment method was gained. View full abstract»

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  • A critical review on RFID system towards security, trust, and privacy (STP)

    Publication Year: 2011 , Page(s): 39 - 44
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (542 KB) |  | HTML iconHTML  

    Widespread deployment of RFID system across many applications creates a very good impact on users and it also simplifies a lot of business transactions. However, this situation may potentially impose security and privacy threats. We noted that previous RFID protocols provide solutions for security and privacy in silo and they usually focus more on security components as compared to privacy. We vide that the existing situation is not balanced and hence our approach in tackling it is unique because we propose an overall approach that considers security, trust and privacy (STP) together. We propose to use lightweight based encryption subsystem to handle security, trusted computing based subsystem to provide trust and integrity verifications and privacy enhanced system (anonymizer) to solve privacy issues for RFID system. This paper reviews previous works on RFID protocols and highlights the importance of RFID system with STP subsystems. View full abstract»

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  • Character segmentation for multi lingual Indic and Roman scripts

    Publication Year: 2011 , Page(s): 45 - 49
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (531 KB) |  | HTML iconHTML  

    Character segmentation has long been a critical area of the Optical Character Recognition. In this paper, we present an algorithm for character segmentation for Indic and Roman scripts. Character segmentation is difficult for Indic scripts because in these scripts characters are connected with the Shirorekha or headline and the regions bounding the two consecutive characters might overlap because of matraas. Horizontal projection profile is used to extract the Shirorekha and a vertical projection profile is used to segment the characters. Results of the algorithm for the scanned and facsimile documents for Devnagari Script are shown. View full abstract»

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  • Application of Artificial Neural networks in modeling water networks

    Publication Year: 2011 , Page(s): 50 - 57
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (750 KB) |  | HTML iconHTML  

    Artificial Neural networks ANNs are dynamic systems which have the ability not only to capture the relationship between input and output parameters of complex systems but also highly effective when there is no any mathematical formula or model for the system. Therefore, they are very potential and appropriate for design of systems whose functions cannot be expressed explicitly in the form of mathematical model. If significant variables are known, without knowing the exact relationships, ANN is suitable to perform a kind of function fitting by using multiple parameters on the existing information and predict the possible relationships in the near future. This is the case in the water distribution network design or operation problems wherein the input (pipe diameters, lengths, age, soil, etc...)-output (reliability of the network) relationship is given by the set of nonlinear continuity equations, path head loss equations and the head-discharge relationship. This paper introduces a methodology of establishing ANN of modeling the pipe breaks from which rehabilitation strategies (proactive maintenance strategy), prioritization of rehabilitation implementation, finding the optimum time for rehabilitation of the pipe and determining the parameters that most affect the likelihood of pipe breaks, can be determined for predicting the number of breaks for each individual pipe in the water distribution system of Benghazi city (WDSB). Because this work is a part of a research has not completed yet, this paper presents only the modeling technique using ANN to achieve the main objective which is; expected number of pipe breaks. View full abstract»

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  • Using Hidden Markov Models for accelerometer-based biometric gait recognition

    Publication Year: 2011 , Page(s): 58 - 63
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (826 KB) |  | HTML iconHTML  

    Biometric gait recognition based on accelerometer data is still a new field of research. It has the merit of offering an unobtrusive and hence user-friendly method for authentication on mobile phones. Most publications in this area are based on extracting cycles (two steps) from the gait data which are later used as features in the authentication process. In this paper the application of Hidden Markov Models is proposed instead. These have already been successfully implemented in speaker recognition systems. The advantage is that no error-prone cycle extraction has to be performed, but the accelerometer data can be directly used to construct the model and thus form the basis for successful recognition. Testing this method with accelerometer data of 48 subjects recorded using a commercial of the shelve mobile phone a false non match rate (FNMR) of 10.42% at a false match rate (FMR) of 10.29% was obtained. This is half of the error rate obtained when applying an advanced cycle extraction method to the same data set in previous work. View full abstract»

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  • LED indicator for heart rate monitoring system in sport application

    Publication Year: 2011 , Page(s): 64 - 66
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (802 KB) |  | HTML iconHTML  

    This paper presents a current invention for monitoring the athletes' heart rate during training or exercise session. A bracelet with different color code of Light Emitting Diode (LED) is designed as a wrist heart rate monitor. This color-coding makes the heart rate easier to monitor and enabling the user to know their heart rate range at a certain moment. Our works investigate the used of Zigbee and ANT+ as a transmission medium from transmitter (chest strap) to receiver (bracelet). Different colors signify different ranges of heart rate. Preliminary result demonstrated that it is very helpful for athletes and coaches to monitor the fitness level of athletes and regulate their exercise training regime in a more effective and safer manner. View full abstract»

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  • Capability of low cost digital camera for production of orthophoto and volume determination

    Publication Year: 2011 , Page(s): 67 - 71
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1415 KB) |  | HTML iconHTML  

    This paper discusses about the use of low cost digital camera or known as non metric camera as photogrammetry tool for speeding up the process of acquiring aerial data. Digital camera can also be categorized as non metric camera. In photogrammetry, digital camera has been used for many diversified applications either in aerial photogrammetry or close range photogrammetry. The digital camera also has the potential to be used for landslide mapping and monitoring. In this study, a low cost digital camera has been used to acquire digital images of a simulated model build from sand and cement (dimension of 1m × 3m) which represent some form of topographic surface. In the simulated model, an area was excavated to simulate landslide occur in the area. The acquired digital images of the simulated model were then processed using photogrammetric technique to the final photogrammetric output that is the digital orthophoto. The digital camera used is of high resolution and suitable for large scale mapping which does not involve large study area, require moderate accuracy and limited budget. The objective of this study is to investigate the capability of a low cost digital camera in generating three dimensional models, digital elevation model (DEM) and finally the digital orthophoto. The other objective of this study is to investigate whether the data captured using the digital camera can be used for volume determination that was excavated from an area in the simulated model. The results of the study showed that the low cost digital camera is capable of producing digital orthophoto and capable of determining the excavated volume of the simulated model. View full abstract»

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  • Real-time control of non-minimum phase electro-hydraulic system using trajectory-adaptive ZPETC

    Publication Year: 2011 , Page(s): 72 - 76
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (837 KB) |  | HTML iconHTML  

    Hydraulic actuator has been widely used in industrial equipments and processes principally due to its high-power density and system solution that it can provided. The natural nonlinear property of hydraulic cylinder has challenged researchers in designing suitable controller for positioning control, motion control and tracking control. This paper proposes a controller design using trajectory-adaptive ZPETC without factorization of zeros and implementing real-time control to non-minimum phase electro-hydraulic system. Simulation and real-time experimental results were compared and evaluated and they show interesting tracking performances. View full abstract»

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  • Genetic variation of Mahseer Tor spp. in Pahang National Park using cytochrome b mtDNA gene based on phylogenetic analysis - a research framework

    Publication Year: 2011 , Page(s): 77 - 79
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (458 KB) |  | HTML iconHTML  

    Mahseer being the most important freshwater fish that contributes to the major fisheries activity of the rivers in the world. In Malaysia, Mahseer is an important indigenous freshwater fish because of their market value. However, the number of this freshwater fish declining from day to day due to the human activity and environment destruction. In this study, mitochondrial DNA (mtDNA) which is cytochrome b gene was used to examine the genetic variation between four populations of Mahseer Tor spp. In total, forty-four individuals Mahseer were sampled from kelah sanctuary (n=22), Keniam River (n=1), Sat River (n=7) and Sepia River (n= 14) at Pahang National Park. Neighbor-joining as well as maximum-parsimony methods were used to analyze the phylogenetic relationships between Mahseer tor spp. The continuation of study based on the findings should be taken in order to start proper management as well as conservation of this valuable fish. View full abstract»

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  • Theta, Alpha and Beta Band frequencies of different nicotine dependency level among smokers

    Publication Year: 2011 , Page(s): 80 - 83
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (562 KB) |  | HTML iconHTML  

    This paper presents a study of EEG pattern for different levels of nicotine dependence for smokers based on Theta, Alpha and Beta Band power using Power Spectral Density (PSD). 33 male smokers participated for this research. Participants were asked to fill in the Fagerstrom Test for Nicotine Dependence Questionnaire and EEG data was recorded for 5 minutes. Results show some difference in the Theta, Alpha and Beta Band power of smokers from different levels of nicotine dependence, where medium dependence smokers have a higher Theta, Alpha and Beta Band power compared to low dependence smokers. View full abstract»

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  • Adaptive neural controller implementation in Autonomous Mini Aircraft Quadrotor (AMAC-Q) for attitude control stabilization

    Publication Year: 2011 , Page(s): 84 - 89
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (684 KB) |  | HTML iconHTML  

    This paper describes about adaptive neural controller (ANC) to stabilize an Autonomous Mini Aircraft Quadrotor (AMAC-Q) as Unmanned Aerial Vehicle (UAV) by using Model References Adaptive System (MRAS) as control scheme. View full abstract»

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  • A differential steering control with proportional controller for an autonomous mobile robot

    Publication Year: 2011 , Page(s): 90 - 94
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (658 KB) |  | HTML iconHTML  

    In this paper, differential steering control with proportional controller method are developed. In the steering control of mobile robot, the underlying dynamics of processes are often highly complex due to operating problems such as actuator constrains, time delay and disturbances. Because of these reasons, many control system of mobile robots require extensive retuning the control parameter and the worst cases may result in redesigning or change the control program and hardware. To solve the above mentioned problems, we use proportional control method. Based on the model proportional control method, we predict the path that the mobile robot will follow by using the current velocities of the right wheel and the left wheel which update the real-time current position of mobile robot. The model proportional method is to overcome time delay cause by slow response of the sensor and other dynamic processes. The outputs from the control are the velocity and angular velocity of mobile robot. From these velocity and angular velocity of mobile robot we determine the number of encoder pulses for the right wheel and left wheel. The number of encoder pulses for the right wheel and left wheel are input to the right DC motor and to the left DC motor of mobile robot to generate the velocity of each wheel. The proportional controller is used to produce the same speed of the right wheel and the left wheel in order to make the mobile robot move in a straight line. It also used to produce the desired speed of the right wheel and left wheel for steering control to make left or right turning. View full abstract»

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  • A sorting-based architecture of finding the first two minimum values for LDPC decoding

    Publication Year: 2011 , Page(s): 95 - 98
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (559 KB) |  | HTML iconHTML  

    This paper presents an efficient architecture of finding the first two minimum values for row operation in LDPC decoding. Given a set of numbers X, efficient algorithm and its corresponding hardware implementation for finding the first minimum value, min_1st, second minimum value, min_2nd and the position of min_1st are greatly needed in LDPC decoder design. The design is based on sorting-based approach proposed in. Compared to the conventional architecture, our architecture performs better in both speed and area. An extension method is also presented to apply the proposed architecture when the number of inputs is an any positive integer. View full abstract»

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