ORCID Profile
0000-0002-5550-1975
Current Organisation
University of Wollongong
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Publisher: The Optical Society
Date: 05-02-2019
DOI: 10.1364/OE.27.004090
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2006
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2000
DOI: 10.1109/81.847888
Publisher: Springer Science and Business Media LLC
Date: 11-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 1998
DOI: 10.1109/76.660827
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2023
Publisher: IEEE
Date: 07-2014
Publisher: SPIE
Date: 10-01-2005
DOI: 10.1117/12.575150
Publisher: Springer India
Date: 29-10-2015
Publisher: Elsevier BV
Date: 08-2017
Publisher: IEEE
Date: 03-2016
Publisher: The Optical Society
Date: 29-05-2014
DOI: 10.1364/OE.22.013641
Publisher: Optica Publishing Group
Date: 25-03-2020
DOI: 10.1364/OE.387277
Abstract: We investigate the evolution of nonlinear dynamic behaviors of two polarization components (x-PC and y-PC), as well as the interplay of polarization bistability and injection strength in the vertical-cavity surface-emitting laser (VCSEL) with polarization-preserved optical injection. We explore a new threshold mechanism to judge two logic outputs encoded in different dynamic behaviors of the x-PC and y-PC emitted by the VCSEL with polarization-preserved optical injection. We demonstrate implementations of two parallel optical chaotic reset-set flip-flop operations and two parallel chaotic toggle flip-flop operations that are synchronized by a clock signal and response for as short as 1 ns bit time. We further observe the reconfiguration of these two kinds of flip-flop operations with clock synchronization in different time periods by controlling the duration-time of the reset (toggle) signal with high-level. The probability of the correct trigger responses for these two kinds of flip-flop operations is controlled by the interplay of the duration-time of the reset (toggle) signal and the noise strength of the spontaneous emission. The probability that is equal to 1 for the reset-set flip-flop operations occurs in the long duration-time of the reset (toggle) signal ranging from 480 ps to 592 ps. The probability with 1 for the toggle flip-flop operations takes place in the short duration-time between 116 ps and 170 ps. Moreover, these two kinds of flip-flop operations have strong robust to the spontaneous emission noise. The optical chaotic flip-flop operation device with clock synchronization and reconfigurable trigger function proposed in our scheme offers interesting perspectives for applications where noise is unavoidable and synchronized multiple triggering is required.
Publisher: The Optical Society
Date: 28-06-2011
DOI: 10.1364/OL.36.002518
Publisher: Elsevier BV
Date: 05-2019
Publisher: IEEE
Date: 12-2006
Publisher: IEEE
Date: 12-2006
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2021
Publisher: IEEE
Date: 12-2006
Publisher: IEEE
Date: 12-2006
Publisher: IEEE
Date: 12-2006
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2009
Publisher: Institution of Engineering and Technology (IET)
Date: 10-09-2018
Publisher: MDPI AG
Date: 16-06-2018
DOI: 10.3390/S18061956
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2017
Publisher: Informa UK Limited
Date: 03-01-2017
Publisher: SPIE
Date: 10-04-2018
DOI: 10.1117/12.2303601
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2017
Publisher: IEEE
Date: 2005
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2023
Publisher: IEEE
Date: 11-2015
Publisher: Elsevier BV
Date: 05-1995
Publisher: SPIE
Date: 13-05-2010
DOI: 10.1117/12.865679
Publisher: The Optical Society
Date: 26-11-2014
DOI: 10.1364/OL.39.006715
Publisher: The Optical Society
Date: 07-01-2014
DOI: 10.1364/AO.53.000200
Publisher: SPIE
Date: 28-02-2005
DOI: 10.1117/12.582152
Publisher: SPIE
Date: 29-11-2012
DOI: 10.1117/12.1000072
Publisher: The Optical Society
Date: 11-12-2018
DOI: 10.1364/AO.57.010364
Publisher: IEEE
Date: 10-2012
Publisher: SPIE
Date: 28-05-2014
DOI: 10.1117/12.2049791
Publisher: SPIE-Intl Soc Optical Eng
Date: 17-10-2018
Publisher: The Optical Society
Date: 20-05-2013
DOI: 10.1364/OL.38.001781
Publisher: SPIE-Intl Soc Optical Eng
Date: 24-12-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2019
Publisher: SPIE
Date: 03-11-2010
DOI: 10.1117/12.870232
Publisher: Springer Science and Business Media LLC
Date: 09-2016
Publisher: SPIE-Intl Soc Optical Eng
Date: 03-07-2014
Publisher: IEEE
Date: 04-2018
Publisher: IEEE
Date: 2005
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 02-2013
Publisher: MDPI AG
Date: 06-11-2019
DOI: 10.3390/SYM11111377
Abstract: Large-scale symmetric arrays such as uniform linear arrays (ULA) have been widely used in wireless communications for improving spectrum efficiency and reliability. Channel state information (CSI) is critical for optimizing massive multiple-input multiple-output(MIMO)-based wireless communication systems. The acquisition of CSI for massive MIMO faces challenges such as training shortage and high computational complexity. For millimeter wave MIMO systems, the low-rankness of the channel can be utilized to address the challenge of training shortage. In this paper, we compared several channel estimation schemes based on matrix completion (MC) for symmetrical arrays. Performance and computational complexity are discussed and compared. By comparing the performance in different scenarios, we concluded that the generalized conditional gradient with alternating minimization (GCG-Alt) estimator provided a low-cost, robust solution, while the alternating direction method of multipliers (ADMM)-based hybrid methods achieved the best performance when the array response was perfectly known.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-08-2019
Publisher: IOP Publishing
Date: 10-06-2015
Publisher: The Optical Society
Date: 30-06-2014
DOI: 10.1364/AO.53.004256
Publisher: Wiley
Date: 16-02-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2018
Publisher: The Optical Society
Date: 10-09-2012
DOI: 10.1364/OE.20.021905
Publisher: MDPI AG
Date: 31-07-2019
DOI: 10.3390/S19153368
Abstract: Hybrid massive MIMO structures with lower hardware complexity and power consumption have been considered as potential candidates for millimeter wave (mmWave) communications. Channel covariance information can be used for designing transmitter precoders, receiver combiners, channel estimators, etc. However, hybrid structures allow only a lower-dimensional signal to be observed, which adds difficulties for channel covariance matrix estimation. In this paper, we formulate the channel covariance estimation as a structured low-rank matrix sensing problem via Kronecker product expansion and use a low-complexity algorithm to solve this problem. Numerical results with uniform linear arrays (ULA) and uniform squared planar arrays (USPA) are provided to demonstrate the effectiveness of our proposed method.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2016
Publisher: IOP Publishing
Date: 06-2019
DOI: 10.1088/1742-6596/1213/5/052049
Abstract: Eye state recognition is a key step in fatigue detection method. However, factors such as occlusion of different types of glasses and changes in lighting conditions may have some impact on eye state recognition. In order to solve these problems, a driver’s eye state recognition method based on deep learning is proposed. Firstly, the driver’s face images are acquired using an infrared acquisition device. Secondly the multi-task cascaded convolution neural networks are used to detect the face bounding box and feature points of the driver’s face image, and then the eye regions are extracted. Finally the Convolution Neural Network (CNN) is adopted to identify the open and closed state of the eyes. Experimental result shows that the proposed method can accurately identify the state of eyes and help to calculate the fatigue parameters of drivers.
Publisher: SPIE
Date: 20-11-2012
DOI: 10.1117/12.1000087
Publisher: MDPI AG
Date: 16-11-2018
DOI: 10.3390/S18114004
Abstract: This paper presents a new method for measuring the linewidth enhancement factor (alpha factor) by the relaxation oscillation (RO) frequency of a laser with external optical feedback (EOF). A measurement formula for alpha is derived which shows the alpha can be determined by only using the RO frequencies and no need to know any other parameters related to the internal or external parameters associated to the laser. Unlike the existing EOF based alpha measurement methods which require an external target has a symmetric reciprocate movement. The proposed method only needs to move the target to be in a few different positions along the light beam. Furthermore, this method also suits for the case with alpha less than 1. Both simulation and experiment are performed to verify the proposed method.
Publisher: SPIE
Date: 20-11-2012
DOI: 10.1117/12.1000086
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: IEEE
Date: 11-2015
Publisher: Institution of Engineering and Technology (IET)
Date: 09-2016
DOI: 10.1049/EL.2016.1972
Publisher: Frontiers Media SA
Date: 27-02-2020
Publisher: MDPI AG
Date: 21-09-2016
DOI: 10.3390/S16091546
Publisher: Springer Science and Business Media LLC
Date: 07-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2020
Publisher: IEEE
Date: 12-2008
Publisher: Elsevier BV
Date: 2005
Publisher: Frontiers Media SA
Date: 18-06-2019
Publisher: The Optical Society
Date: 03-11-2015
DOI: 10.1364/OE.23.029625
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA00227E
Abstract: Recent advances in smart textiles and wearable technologies based on piezoelectric fibers as wearable energy harvesters.
Publisher: MDPI AG
Date: 13-10-2017
DOI: 10.3390/S17102336
Publisher: Springer Science and Business Media LLC
Date: 28-02-2019
DOI: 10.1038/S41598-019-40162-Z
Abstract: Traditional polymerisation shrinkage (PS) measurement systems measure average PS of dental composites, but the true local PS varies along the length and breadth of the composite. The PS depends on the curing light intensity distribution, resultant degree of conversion (DOC) and the curing rate. In this paper, optical fibre Bragg grating (FBG) sensing based technology is used to measure the linear post-gel PS at multiple locations within dental composite specimens, and is correlated with DOC and curing rate. A commercial dental composite is used, and its post-gel PS and DOC are mapped using embedded fibre Bragg grating sensors at different curing conditions. The distance between the curing l and the composite specimen is varied which resulted in different intensity distribution across the specimen. The effect of curing light intensity distribution on PS, curing rate and DOC are investigated for demonstrating a relationship among them. It is demonstrated that FBG sensing method is an effective method to accurately profiling post-gel PS across the specimen.
Publisher: The Optical Society
Date: 12-01-2015
DOI: 10.1364/AO.54.000347
Publisher: The Optical Society
Date: 18-03-2014
DOI: 10.1364/AO.53.001794
Publisher: SPIE
Date: 28-02-2005
DOI: 10.1117/12.581484
Publisher: MDPI AG
Date: 05-11-2020
DOI: 10.3390/S20216303
Abstract: A novel Dual-frequency Doppler LiDAR (DFDL) is presented where the dual-frequency light source is generated by using external optical feedback (EOF) effect in a laser diode (LD). By operating a LD at period-one (P1) state and choosing suitable LD related parameters, a dual-frequency light source can be achieved. Such a dual-frequency source has advantages of the minimum part-count scheme, low cost in implementation, and ease in optical alignment. Theory and system design are presented for the proposed DFDL for velocity measurement with high measurement resolution. The proposed design has a potential contribution to the Light Detection And Ranging (LiDAR) in practical engineering applications.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: SPIE
Date: 08-10-2015
DOI: 10.1117/12.2199349
Publisher: The Institute of Brewing & Distilling
Date: 2017
DOI: 10.1002/JIB.399
Publisher: IEEE
Date: 10-2007
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2007
Publisher: Springer Science and Business Media LLC
Date: 27-01-2017
Publisher: Informa UK Limited
Date: 04-2016
Publisher: SPIE
Date: 09-11-2005
DOI: 10.1117/12.632582
Publisher: SPIE
Date: 18-11-2014
DOI: 10.1117/12.2071587
Publisher: IEEE
Date: 05-2018
Publisher: The Optical Society
Date: 18-10-2013
DOI: 10.1364/AO.52.007360
Publisher: Springer Science and Business Media LLC
Date: 06-11-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2023
Publisher: SPIE
Date: 18-11-2019
DOI: 10.1117/12.2539362
Publisher: Springer Science and Business Media LLC
Date: 30-08-2014
Publisher: The Optical Society
Date: 05-09-2011
DOI: 10.1364/AO.50.005064
Publisher: IEEE
Date: 08-2010
DOI: 10.1109/CGIV.2010.28
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2013
Publisher: Elsevier BV
Date: 03-2018
Publisher: SPIE-Intl Soc Optical Eng
Date: 22-01-2019
Publisher: IEEE
Date: 03-2012
Publisher: MDPI AG
Date: 22-06-2016
DOI: 10.3390/S16060928
Publisher: The Optical Society
Date: 05-12-2013
DOI: 10.1364/OE.21.030610
Publisher: Elsevier BV
Date: 04-2023
Publisher: IEEE
Date: 12-2008
Publisher: IEEE
Date: 2005
Publisher: SPIE
Date: 11-2017
DOI: 10.1117/12.2285258
Publisher: IEEE
Date: 2007
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2013
Publisher: IEEE
Date: 2005
Publisher: IEEE
Date: 2005
Publisher: SPIE
Date: 18-11-2019
DOI: 10.1117/12.2539216
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: Optica Publishing Group
Date: 09-2006
DOI: 10.1364/AO.45.006560
Abstract: What is believed to be a new analysis algorithm to carry out profile measurement with low computational complexity and less noise sensitivity is presented. First, a discrete cosine transform (DCT)-based representation method is introduced to express the height distribution of a 3D surface. Then a novel shift estimation algorithm, called the DCT-based shift estimation (DCT-SE), is presented to reconstruct 3D object surfaces by using the proposed expression and the generalized analysis model. The advantage of DCT-SE is that without loss of measurement precision it provides lower computational complexity to implement 3D reconstruction from nonlinearly distorted fringe patterns and, at the same time, survives the random noise. Simulations and experiments show that the proposed DCT-SE is a fast, accurate, and efficient reconstruction algorithm for digital projection- based fringe pattern profilometry techniques.
Publisher: IOP Publishing
Date: 17-12-2015
Publisher: IOP Publishing
Date: 03-02-2009
Publisher: Elsevier BV
Date: 05-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-06-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2021
Publisher: SAGE Publications
Date: 13-09-2017
Abstract: Surface braiding angle and pitch length are two important parameters for characterizing and evaluating the performance of three-dimensional braided composite preforms. In this paper a new method based on an improved curvature scale space corner detector with adaptive threshold is proposed for measuring these parameters, with applications to three-dimensional, four-directional carbon-fiber braided composite preforms. First, the original image is acquired using a system employing ‘dome light source + CCD camera + circular polarizing filter’. Second, the original image is processed using Lab transform and BM3D (block-matching and 3D filter). Third, the corners are detected using an improved curvature scale space corner detector with adaptive threshold. Finally, the pitch lengths and surface braiding angles are measured from the detected corners. Experimental results show that the proposed method can achieve automatic measurement of the pitch length and surface braiding angle with smaller average errors relative to manual measurements compared with alternative schemes.
Publisher: Informa UK Limited
Date: 06-1994
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2015
Publisher: IEEE
Date: 10-2007
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2019
Publisher: Elsevier BV
Date: 2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2021
Publisher: IEEE
Date: 06-2012
Publisher: SPIE
Date: 12-01-2018
DOI: 10.1117/12.2288654
Publisher: IOP Publishing
Date: 06-2019
DOI: 10.1088/1742-6596/1213/4/042025
Abstract: Aiming at the problem of low accuracy of large size sheet edge, a method of sheet size error measurement based on control field is proposed. Firstly, an error compensation model of the measuring system based on control field is established by analyzing the causes of the errors of the measuring system. A grid standard plate is designed and the error distribution on the grid line is obtained by using the measurement results of the standard plate. Secondly, the error curve is established according to the distribution, and the trig function theorem is used to project the curve into the image pixel coordinate system. Finally, the control field of the whole measurement area is reconstructed by linear interpolation, and the measurement results are compensated and corrected. The steel sheet is measured in the measuring area of 1.2m × 2.6m on the basis of these theories and technologies. The experiment shows that the precision of the measuring system can reach 1mm per meter, which satisfies the accuracy and speed requirements of large-size steel sheet measurement in industry, and has high application value.
Publisher: Optica Publishing Group
Date: 10-09-2020
DOI: 10.1364/OE.405198
Abstract: Many methods have been proposed to reconstruct the moving object based on phase shifting profilometry. Quality reconstruction results can be achieved when a single moving object or multiple objects with same movement are measured. However, errors will be introduced when multiple objects with in idual movements are reconstructed. This paper proposes an automated method to track and reconstruct the multiple objects with in idual movement. First, the objects are identified automatically and their bounding boxes are obtained. Second, with the identified objects’ images before movement, the objects are tracked by the KCF algorithm in the successive fringe pattern after movement. Third, the SIFT method is applied on the tracked object images and the objects’ movement is described in idually by the rotation matrix and translation vector. Finally, the multiple objects are reconstructed based on the different movement information. Experiments are presented to verify the effectiveness.
Publisher: SPIE
Date: 23-11-2011
DOI: 10.1117/12.906570
Publisher: SPIE
Date: 13-11-2014
DOI: 10.1117/12.2071360
Publisher: SPIE
Date: 23-11-2011
DOI: 10.1117/12.906577
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2017
Publisher: The Optical Society
Date: 14-11-2014
DOI: 10.1364/OE.22.029234
Publisher: Elsevier BV
Date: 11-2015
Publisher: SPIE
Date: 02-11-2018
DOI: 10.1117/12.2502644
Publisher: AIP Publishing
Date: 07-2019
DOI: 10.1063/1.5098811
Abstract: Laser dynamics have great potential for various applications, ranging from cryptography to microwave photonics and instrumentation. This letter presents a design for achieving high sensitive sensing and measurement using the dynamics of a laser diode (LD) with a dual external cavity. In the design, one cavity is used to control the dynamics, making the LD operate at the period-one (P1) oscillation state, and the other one is associated with the quantities to be measured. The Lang-Kobayashi equations are modified and solved to develop a bifurcation diagram for the design, from which we determine the P1 state and investigate the sensing performance within this state. It is shown that, when operating in P1, the laser intensity exhibits an oscillation with its litude modulated by a traditional optical feedback interferometric (OFI) signal (generated with a single cavity and LD operating at the steady state). It is also observed that the modulation depth is remarkably larger than the magnitude of a traditional OFI signal. This leads to a significant increase in the sensitivity of sensing and measurement and hence provides an attractive solution for the detection of very small or weak physical quantities. An experimental system is designed, and the experimental results verify the high sensitive sensing performance of the proposed design.
Publisher: Optica Publishing Group
Date: 11-07-2007
Abstract: We present an algorithm for estimating the color demixing matrix based on the color fringe patterns captured from the reference plane or the surface of the object. The advantage of this algorithm is that it is a blind approach to calculating the demixing matrix in the sense that no extra images are required for color calibration before performing profile measurement. Simulation and experimental results convince us that the proposed algorithm can significantly reduce the influence of the color cross talk and at the same time improve the measurement accuracy of the color-channel-based phase-shifting profilometry.
Publisher: IEEE
Date: 07-2016
Publisher: Springer Science and Business Media LLC
Date: 03-2015
Publisher: Springer Science and Business Media LLC
Date: 07-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2013
Publisher: Informa UK Limited
Date: 06-10-2017
Publisher: IEEE
Date: 10-2017
Publisher: IEEE
Date: 08-2019
Publisher: IEEE
Date: 2005
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2016
Publisher: IEEE
Date: 2008
Publisher: SPIE
Date: 07-03-2014
DOI: 10.1117/12.2039004
Publisher: IEEE
Date: 11-2015
Publisher: IOP Publishing
Date: 17-12-2014
Publisher: IEEE
Date: 11-2015
Publisher: The Optical Society
Date: 14-11-2014
DOI: 10.1364/OE.22.029260
Publisher: IEEE
Date: 04-2018
Publisher: IEEE
Date: 2006
Publisher: IEEE
Date: 09-2019
Publisher: MDPI AG
Date: 03-04-2019
DOI: 10.3390/APP9071408
Abstract: In order to achieve the goal of detecting the fertility of hatching eggs which are ided into fertile eggs and dead eggs more accurately and effectively, a novel method combining a convolution neural network (CNN) and a heartbeat signal of the hatching eggs is proposed in this paper. Firstly, we collected heartbeat signals of 9-day-later hatching eggs by the method of PhotoPlethysmoGraphy(PPG), which is a non-invasive method to detect the change of blood volume in living tissues by photoelectric means. Secondly, a sequential convolutional neural network E-CNN, which was used to analyze heartbeat sequence of hatching eggs, was designed. Thirdly, an end-to-end trainable convolutional neural network SR-CNN, which was used to process heartbeat waveform images of hatching eggs, was designed to improve the classification performance in this paper. Key to improving the classification performance of SR-CNN is the SE-Res module, which combines the channel weighting unit “Squeeze-and-Excitation” (SE) block and the residual structure. The experimental results show that two models trained on our dataset, with E-CNN and SR-CNN, are able to achieve the fertility detection of the hatching eggs with superior identification accuarcy, up to 99.50% and 99.62% respectively, on our test set. It is demonstrated that the proposed method is feasible for identifying and classifying the survival of hatching eggs accurately and effectively.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2018
Publisher: Elsevier BV
Date: 07-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2019
Publisher: Elsevier BV
Date: 10-2023
Publisher: IEEE
Date: 2005
Publisher: IEEE
Date: 07-2013
Publisher: Institution of Engineering and Technology (IET)
Date: 08-2017
DOI: 10.1049/EL.2017.2364
Publisher: MDPI AG
Date: 31-10-2023
DOI: 10.3390/S23218872
Publisher: SPIE
Date: 03-11-2010
DOI: 10.1117/12.870057
Publisher: IEEE
Date: 05-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2009
Publisher: Hindawi Limited
Date: 10-11-2015
DOI: 10.1155/2015/420183
Abstract: To solve the problems of tracking errors such as target missing that emerged in compressive tracking (CT) algorithm due to factors such as pose variation, illumination change, and occlusion, a novel tracking algorithm combined angular point matching with compressive tracking (APMCCT) was proposed. A sparse measurement matrix was adopted to extract the Haar-like features. The offset of the predicted target position was integrated into the angular point matching, and the new target position was calculated. Furthermore, the updating mechanism of the template was optimized. Experiments on different video sequences have shown that the proposed APMCCT performs better than CT algorithm in terms of accuracy and robustness and adaptability to pose variation, illumination change, and occlusion.
Publisher: IEEE
Date: 2000
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2014
Publisher: SPIE
Date: 23-11-2011
DOI: 10.1117/12.906556
Publisher: The Optical Society
Date: 29-05-2012
DOI: 10.1364/OE.20.013238
Publisher: MDPI AG
Date: 04-06-2019
DOI: 10.3390/SYM11060759
Abstract: Sixteen-day hatching eggs are ided into fertile eggs, waste eggs, and recovered eggs. Because different categories may have the same characteristics, they are difficult to classify. Few existing algorithms can successfully solve this problem. To this end, we propose an end-to-end deep learning network structure that uses multiple forms of signals. First, we collect the photoplethysmography (PPG) signal of the hatching eggs to obtain heartbeat information and photograph hatching eggs with a camera to obtain blood vessel pictures. Second, we use two different network structures to process the two kinds of signals: Temporal convolutional networks are used to process heartbeat information, and convolutional neural networks (CNNs) are used to process blood vessel pictures. Then, we combine the two feature maps and use the long short-term memory (LSTM) network to model the context and recognize the type of hatching eggs. The system is then trained with our dataset. The experimental results demonstrate that the proposed end-to-end multimodal deep learning network structure is significantly more accurate than using a single modal network. Additionally, the method successfully solves the 16-day hatching egg classification problem.
Publisher: SPIE
Date: 06-03-2014
DOI: 10.1117/12.2038954
Publisher: IOP Publishing
Date: 05-07-2005
Publisher: OSA
Date: 2019
Publisher: SPIE
Date: 31-01-2012
DOI: 10.1117/12.915940
Publisher: SPIE
Date: 18-11-2014
DOI: 10.1117/12.2071308
Publisher: Institution of Engineering and Technology (IET)
Date: 10-2014
DOI: 10.1049/EL.2014.2154
Publisher: Optica Publishing Group
Date: 15-01-2005
DOI: 10.1364/OL.30.000189
Abstract: A novel optical phase-shifting method based on a well-known acousto-optic interaction is proposed. By using a pair of acousto-optic modulators (AOMs) and properly aligning them, we construct an optical phase shifter that can directly control the phase of a collimated beam. The proposed phase shifter is insensitive to the polarization of the incident beam when polarization-insensitive AOMs are used, and no calibration is necessary. The proposed approach is confirmed with experimental results.
Publisher: SPIE
Date: 03-11-2010
DOI: 10.1117/12.870051
Publisher: SPIE
Date: 03-11-2010
DOI: 10.1117/12.870052
Publisher: IEEE
Date: 05-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-1997
DOI: 10.1109/82.558461
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2008
Publisher: Springer Science and Business Media LLC
Date: 11-2016
Publisher: Springer Science and Business Media LLC
Date: 09-2015
Publisher: IEEE
Date: 05-2013
Publisher: Elsevier BV
Date: 07-2018
Publisher: IEEE
Date: 12-2013
Publisher: Elsevier BV
Date: 02-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2014
Publisher: MDPI AG
Date: 07-01-2019
DOI: 10.3390/S19010192
Abstract: This work experimentally demonstrates that the imaging quality of quantum ghost imaging (GI) with entangled photons can be significantly improved by properly handling the errors caused by the imperfection of optical devices. We also consider compressive GI to reduce the number of measurements and thereby the data acquisition time. The image reconstruction is formulated as a sparse total least square problem which is solved with an iterative algorithm. Our experiments show that, compared with existing methods, the new method can achieve a significant performance gain in terms of mean square error and peak signal–noise ratio.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: The Optical Society
Date: 25-03-2015
DOI: 10.1364/AO.54.002703
Publisher: IOP Publishing
Date: 13-12-2006
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2020
Publisher: IEEE
Date: 05-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: IEEE
Date: 04-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2015
Publisher: Elsevier BV
Date: 04-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 1996
DOI: 10.1109/19.517004
Publisher: The Optical Society
Date: 30-07-2019
DOI: 10.1364/OE.27.023357
Publisher: The Optical Society
Date: 29-06-2015
DOI: 10.1364/AO.54.006059
Publisher: Elsevier BV
Date: 09-2016
DOI: 10.1016/J.DENTAL.2016.06.015
Abstract: The characterization of the physical properties of dental resin composites is fraught with difficulties relating to significant intra and inter test parameter variabilities and is relatively time consuming and expensive. The main aim of this study was to evaluate whether optical fiber Bragg grating (FBG) sensing system may become a viable tool to study dental material characteristics. Of particular focus was the potential for the system to demonstrate a multi parameter all-in-one feature. A miniature FBG was embedded in six different dental resin composites and employed as a sensor to evaluate linear polymerization shrinkage, thermal expansion and water sorption. Six commercially available dental composites with different filler types and volume are evaluated. The tests are repeated with three sets of s les. The curing characteristics and residual strain gradient exhibited by the cured dental composites were also observed and commented. Among the studied s les, SDR shows lowest polymerization shrinkage, while Beautifil FO3 shows the highest. The results also show clear distinction between particle filler type and fiber reinforcement based composites in their polymerization shrinkage properties. The agreement of the results with existing literatures show that FBG based system provides accurate results. Polymerization shrinkage rate of the s les are also obtained. Thermal expansion of the composites are measured using the FBG sensing method for the first time and is correlated with resin type, volume, filler type and glass transition temperature. The water sorption characteristics of the dental composite are also successfully measured using the FBG sensing method. The high level of repeatability and the low standard deviations shown in the results indicate good reliability with the use of FBG sensors. This study demonstrates how optical fiber technology can provide simple and reliable methods of measuring the critical physical properties of dental composites. In addition due to the embedding and preservation of the sensor within the s les multiple parameters can be tested for with the same s le. These features are expected to greatly assist material science researchers in dentistry as well as other biomedical fields. Of some interest the phenomenon of stress relaxation of dental composite at higher temperature was observed.
Publisher: SPIE
Date: 16-10-2019
DOI: 10.1117/12.2542261
Publisher: SPIE
Date: 16-10-2019
DOI: 10.1117/12.2542260
Publisher: Optica Publishing Group
Date: 02-2006
DOI: 10.1364/AO.45.000678
Abstract: This paper presents a new approach to fringe pattern profilometry. In this paper, a generalized model describing the relationship between the projected fringe pattern and the deformed fringe pattern is derived, in which the projected fringe pattern can be arbitrary rather than being limited to being sinusoidal, as are those for the conventional approaches. Based on this model, what is believed to be a new approach is proposed to reconstruct the three-dimensional object surface by estimating the shift between the projected and deformed fringe patterns. Additionally, theoretical analysis, computer simulation, and experimental results are presented, which show how the proposed approach can significantly improve the measurement accuracy, especially when the fringe patterns are distorted by unknown factors.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: Elsevier BV
Date: 06-2020
Publisher: Springer Science and Business Media LLC
Date: 03-2013
Publisher: IEEE
Date: 2005
Publisher: IEEE
Date: 2005
Publisher: Optica Publishing Group
Date: 2005
Abstract: In this paper, we report on a laser fringe projection set-up, which can generate fringe patterns with multiple frequencies and phase shifts. Stationary fringe patterns with sinusoidal intensity distributions are produced by the interference of two laser beams, which are frequency modulated by a pair of acousto-optic modulators (AOMs). The AOMs are driven by two RF signals with the same frequency but a phase delay between them. By changing the RF frequency and the phase delay, the fringe spatial frequency and phase shift can be electronically controlled, which allows high-speed switching from one frequency or phase to another thus makes a dynamic 3D profiling possible.
Publisher: SPIE
Date: 24-07-2018
DOI: 10.1117/12.2326823
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: The Optical Society
Date: 17-08-2017
DOI: 10.1364/AO.56.006962
Publisher: OSA
Date: 2019
Publisher: SPIE
Date: 12-11-2019
DOI: 10.1117/12.2542368
Publisher: SPIE
Date: 03-11-2010
DOI: 10.1117/12.870369
Publisher: SPIE
Date: 13-11-2014
DOI: 10.1117/12.2071295
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2018
Publisher: IEEE
Date: 10-2010
Publisher: SPIE
Date: 18-11-2019
DOI: 10.1117/12.2539194
Publisher: SPIE-Intl Soc Optical Eng
Date: 05-10-2016
Publisher: Elsevier BV
Date: 12-2015
Publisher: SPIE
Date: 20-01-2006
DOI: 10.1117/12.668421
Publisher: Elsevier BV
Date: 04-2004
Publisher: SPIE
Date: 07-03-2014
DOI: 10.1117/12.2038985
Publisher: IEEE
Date: 06-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: IEEE
Date: 07-2011
Publisher: The Optical Society
Date: 08-12-2017
DOI: 10.1364/OE.25.032120
Publisher: Elsevier BV
Date: 10-1996
Publisher: SPIE
Date: 25-03-2004
DOI: 10.1117/12.523239
Publisher: Springer Science and Business Media LLC
Date: 27-04-2014
Publisher: Springer Science and Business Media LLC
Date: 07-09-2016
Publisher: IEEE
Date: 05-2013
Publisher: Queensland Univ. Technol
Date: 1999
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2009
Publisher: Elsevier BV
Date: 07-2018
Publisher: IEEE
Date: 08-2014
Publisher: IEEE
Date: 12-2015
Publisher: Optica Publishing Group
Date: 17-08-2020
DOI: 10.1364/OE.403076
Abstract: We have developed a theory model for a three-element laser array where three lasers are laterally coupled using the coupled mode theory and Maxwell equations. New chaotic synchronization properties have been observed systematically in the master-slave configuration, consisting of the driving three-element laser array with self-feedback and the response three-element laser array subjected to the parallel injection or cross injection. Under the parallel injection, the dynamic evolutions of high-quality complete chaotic synchronization between laser elements in different parameter spaces seriously depend on the self-feedback mode of the driving laser elements, such as one, two and all of them with self-feedback. It is found that when only the driving middle one or all of the driving laser elements are subject to self-feedback, high-quality complete chaotic synchronization of all laser elements can be achieved in the same large region of the most of the parameter spaces. In addition, we report here for the first time (to our knowledge) the interestingly symmetrical properties of leader/ laggard chaotic synchronization in the configuration under the cross-injection. Namely, the leader/ laggard chaotic synchronization with high quality between laser elements periodically varies with the delay differences, under the key parameters limited to a certain range. The varying traces of these synchronizations are like sine wave. The mirror symmetry between the laggard chaotic synchronization with in-phase (anti-phase) and the leader one with in-phase (anti-phase) can be achieved by the optimization of the structural parameters of laser waveguides. With the optimization of the related operating parameters, for one of the side-lasers, its leader/ laggard chaotic synchronization can be achieved the anti-symmetry between in-phase and anti-phase. On the other hand, for two symmetrical side-lasers, their leader/ laggard chaotic synchronization with in-phase and anti-phase can reach the anti-symmetry.
Publisher: IEEE
Date: 2005
Publisher: IEEE
Date: 07-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: Elsevier BV
Date: 08-2008
Publisher: IEEE
Date: 10-2010
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2005
Publisher: Elsevier BV
Date: 11-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2016
Publisher: IEEE
Date: 10-2007
Publisher: The Optical Society
Date: 02-05-2011
DOI: 10.1364/OE.19.009582
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: SPIE-Intl Soc Optical Eng
Date: 22-05-2014
Publisher: IEEE
Date: 10-2017
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2020
Publisher: SPIE
Date: 24-07-2018
DOI: 10.1117/12.2500871
Publisher: Springer International Publishing
Date: 11-2017
Publisher: SPIE
Date: 24-11-2005
DOI: 10.1117/12.634919
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Publisher: Optica Publishing Group
Date: 20-02-2007
DOI: 10.1364/AO.46.001233
Abstract: We present a novel neural network signal calibration technique to improve the performance of triangulation-based structured light profilometers based on digital projection. The performance of such profilometers is often hindered by the capture of aberrated pattern intensity distributions, and hence we address this problem by employing neural networks in a signal mapping approach. We exploit the generalization and interpolation capabilities of a feed-forward backpropagation neural network to map from distorted fringe data to nondistorted data. The performance of the calibration technique is gauged both through simulation and experimentation, with simulation results indicating that accuracy can be improved by more than 80%. The technique requires just one image cross section for calibration and hence is ideal for rapid profiling applications.
Publisher: OSA
Date: 2016
Publisher: The Optical Society
Date: 22-12-2014
DOI: 10.1364/OE.22.032220
Publisher: IEEE
Date: 2006
DOI: 10.1109/CGIV.2006.58
Publisher: SPIE
Date: 12-11-2019
DOI: 10.1117/12.2542592
Publisher: IOP Publishing
Date: 14-12-2020
Abstract: Image saturation is a challenging problem for three-dimensional shape measurement of objects with shiny surfaces using fringe projection profilometry technology. This paper presents a new method based on projection of multiple fringe patterns, providing an effective solution to the problem. First, a set of phase shifted sinusoidal fringe patterns with different intensity levels are projected to the object of interest, and the reflections are captured by the camera. With the captured images a set of masks are created, which are able to pick up the unsaturated data from the captured images. The unsaturated data are then combined based on maximal Signal-to-noise Ratio (SNR) scenario, and the combined images are used to retrieve the phase information. Comparing to existing methods, the proposed technique is advantageous by improved measurement accuracy due to the improved SNR. The performance of the proposed method is verified by the experiments.
Publisher: SPIE
Date: 20-08-2009
DOI: 10.1117/12.824845
Publisher: IEEE
Date: 2007
Publisher: SPIE
Date: 24-11-2016
DOI: 10.1117/12.2246094
Publisher: OSA
Date: 2019
Publisher: IEEE
Date: 04-2016
Publisher: Elsevier BV
Date: 02-2021
Publisher: ACM
Date: 04-08-2019
Publisher: SPIE
Date: 14-02-2004
DOI: 10.1117/12.575204
Publisher: SPIE
Date: 20-01-2004
DOI: 10.1117/12.574593
Publisher: OSA
Date: 2019
Publisher: IEEE
Date: 07-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 1997
DOI: 10.1109/82.559367
Publisher: Queensland Univ. Technol
Date: 1999
Publisher: IEEE
Date: 06-2014
Publisher: SPIE
Date: 06-11-2018
DOI: 10.1117/12.2500741
Publisher: Springer Science and Business Media LLC
Date: 05-11-2015
Publisher: AICIT
Date: 30-09-2011
Publisher: SPIE
Date: 06-11-2018
DOI: 10.1117/12.2500737
Publisher: SPIE
Date: 06-11-2018
DOI: 10.1117/12.2500739
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-10-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2017
Publisher: Elsevier BV
Date: 2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2020
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2013
Publisher: Springer Science and Business Media LLC
Date: 11-2014
No related grants have been discovered for Jiangtao Xi.