Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465736
N. P. Pham, Hung Viet Dao, Ha Ngoc Phung, Huy Van Ta, Nam Hoang Nguyen, Tram Thi Hoang
Fall is one of the major causes of serious injury, which include fractures, traumatic brain injury, and death, to the elderly. True fall detection in time will improve the chances of survival and increases the likelihood of normal behavior recovery by up to 80%. Many researchers use accelerometers to detect fall as its convenience, low power and portable. However, simple threshold method can lead to false alarm in several ADLs (Activities of daily living) such as lying or sitting and several types of fall. This paper presents a fall detection algorithm to reduce false alarm using predetermined multi – thresholds in three phase of fall events. The performance of this techniques is evaluated using signals generated during in lab experiments that record the user’s movement signals during normal activities (walking, up/down stairs, standing up, sitting down and lying down) and a variety of fall cases. It was found that our method is able to classify 6 different type of fall and 6 ADLs with the accuracy is 92%, which was comparable to other methods.
{"title":"Classification Different Types of Fall For Reducing False Alarm Using Single Accelerometer","authors":"N. P. Pham, Hung Viet Dao, Ha Ngoc Phung, Huy Van Ta, Nam Hoang Nguyen, Tram Thi Hoang","doi":"10.1109/CCE.2018.8465736","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465736","url":null,"abstract":"Fall is one of the major causes of serious injury, which include fractures, traumatic brain injury, and death, to the elderly. True fall detection in time will improve the chances of survival and increases the likelihood of normal behavior recovery by up to 80%. Many researchers use accelerometers to detect fall as its convenience, low power and portable. However, simple threshold method can lead to false alarm in several ADLs (Activities of daily living) such as lying or sitting and several types of fall. This paper presents a fall detection algorithm to reduce false alarm using predetermined multi – thresholds in three phase of fall events. The performance of this techniques is evaluated using signals generated during in lab experiments that record the user’s movement signals during normal activities (walking, up/down stairs, standing up, sitting down and lying down) and a variety of fall cases. It was found that our method is able to classify 6 different type of fall and 6 ADLs with the accuracy is 92%, which was comparable to other methods.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"300 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121461643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465753
Ha Thuy Tran Thi, H. Nguyen Dac, An Nguyen Ngoc, Dung Nguyen Ngoc, Le Van Thai, Tung Thanh Bui
This paper presents the simulation, design, fabrication and characterization of a two-axis tilt angle capacitive sensor. The proposed sensor consists of five electrodes, including one exciting electrode and two pairs of sensing electrodes, arranged at identified positions on a hollow sphere which is partly filled with liquid/gas two-phase dielectric medium. With this configuration, the proposed sensor can measure the inclination in x− and y− axes with symmetrical outputs. The working principle of the sensor was confirmed by finite element method (FEM) using COMSOL Multiphysics. The sensor has been fabricated using rapid prototyping technology and mounted right on the conditioning printed circuit board (PCB) for performance characterization. Experimental results validated that the sensor can measure the inclination in both the x and y axes with symmetrical outputs, with sensitivity of approximately 60 mV/° and resolution of 1° in [−70°, 70°] range.
{"title":"A 3D Printed Two-axis Tilt Angle Capacitive Sensor","authors":"Ha Thuy Tran Thi, H. Nguyen Dac, An Nguyen Ngoc, Dung Nguyen Ngoc, Le Van Thai, Tung Thanh Bui","doi":"10.1109/CCE.2018.8465753","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465753","url":null,"abstract":"This paper presents the simulation, design, fabrication and characterization of a two-axis tilt angle capacitive sensor. The proposed sensor consists of five electrodes, including one exciting electrode and two pairs of sensing electrodes, arranged at identified positions on a hollow sphere which is partly filled with liquid/gas two-phase dielectric medium. With this configuration, the proposed sensor can measure the inclination in x− and y− axes with symmetrical outputs. The working principle of the sensor was confirmed by finite element method (FEM) using COMSOL Multiphysics. The sensor has been fabricated using rapid prototyping technology and mounted right on the conditioning printed circuit board (PCB) for performance characterization. Experimental results validated that the sensor can measure the inclination in both the x and y axes with symmetrical outputs, with sensitivity of approximately 60 mV/° and resolution of 1° in [−70°, 70°] range.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133647418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465765
T. Nguyen, Hieu T. Nguyen
The contribution of this paper is to propose a new design framework for good low-iteration protograph low density parity check (LDPC) codes for fading channels where space spatial diversity is feasible. The performance of a protograph code of rate 1/2 proves that a power gain of 0.4 dB is achieved at frame error rate (FER) of 10−4 in comparison with the counterpart protograph accumulate-repeat-by-3-accumulate (AR3A) code, which has been shown to have the best performance in the fading environment [1]. Such power gain is meaningful for battery-operated devices in wireless communications systems.
{"title":"The Design of Low-Iteration Protograph Codes for Rayleigh Fading Channels with Spatial Diversity","authors":"T. Nguyen, Hieu T. Nguyen","doi":"10.1109/CCE.2018.8465765","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465765","url":null,"abstract":"The contribution of this paper is to propose a new design framework for good low-iteration protograph low density parity check (LDPC) codes for fading channels where space spatial diversity is feasible. The performance of a protograph code of rate 1/2 proves that a power gain of 0.4 dB is achieved at frame error rate (FER) of 10−4 in comparison with the counterpart protograph accumulate-repeat-by-3-accumulate (AR3A) code, which has been shown to have the best performance in the fading environment [1]. Such power gain is meaningful for battery-operated devices in wireless communications systems.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134045480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465722
Dang-Hieu Nguyen, Minh Nguyen, N. P. Ngoc, T. Thang
Virtually Reality (VR) technology, especially 360 VR videos, is currently a hot topic thanks to its immersive experience, compared to traditional multimedia applications, such as allowing users to experience a close real life by panoramic view. Nevertheless, 360 VR video transmission consumes a huge bandwidth. Besides, how to reduce the delay of 360 VR video streaming is another problem. To address these two challenges, in this paper, we introduce an efficient adaptive 360 VR video streaming method over HTTP/2 using stream priority and stream termination features. To support adaptivity, a 360 VR video is divided into multiple faces and each face is chunked into temporal segments. The video is also stored at the server with different levels of quality. In our method, we focus on the low delay scenario and thus all faces are downloaded simultaneously by using priority feature of HTTP/2 and the client decodes them based on the Group of Pictures (GOP). If the bandwidth suddenly drops, the client will break the simultaneity and inform the server to push consecutively the faces based on their priorities. In addition, stream termination feature can be used to terminate the media parts, which will miss the deadline. The experimental results show that, when the initial buffer is set to 0.5s, there is only 0.08% of the number of GOPs in the front face that miss the deadline in our proposed method, compared to the values of 0.75% and 3.34% of two reference methods.
{"title":"An adaptive method for low-delay 360 VR video streaming over HTTP/2","authors":"Dang-Hieu Nguyen, Minh Nguyen, N. P. Ngoc, T. Thang","doi":"10.1109/CCE.2018.8465722","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465722","url":null,"abstract":"Virtually Reality (VR) technology, especially 360 VR videos, is currently a hot topic thanks to its immersive experience, compared to traditional multimedia applications, such as allowing users to experience a close real life by panoramic view. Nevertheless, 360 VR video transmission consumes a huge bandwidth. Besides, how to reduce the delay of 360 VR video streaming is another problem. To address these two challenges, in this paper, we introduce an efficient adaptive 360 VR video streaming method over HTTP/2 using stream priority and stream termination features. To support adaptivity, a 360 VR video is divided into multiple faces and each face is chunked into temporal segments. The video is also stored at the server with different levels of quality. In our method, we focus on the low delay scenario and thus all faces are downloaded simultaneously by using priority feature of HTTP/2 and the client decodes them based on the Group of Pictures (GOP). If the bandwidth suddenly drops, the client will break the simultaneity and inform the server to push consecutively the faces based on their priorities. In addition, stream termination feature can be used to terminate the media parts, which will miss the deadline. The experimental results show that, when the initial buffer is set to 0.5s, there is only 0.08% of the number of GOPs in the front face that miss the deadline in our proposed method, compared to the values of 0.75% and 3.34% of two reference methods.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133183498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465704
An Hong, M. Rath, Josef Kulmer, Stefan Grebien, Khang Nguyen Van, K. Witrisal
In the field of radio channel modelling, the consideration of ultra-wideband (UWB) signals allows for a channel description that can be decomposed into deterministic multipath components (MPCs) and dense / diffuse multipath. In this paper, deterministic MPCs are studied. A Gaussian Process (GP) model is used as a regression tool to analyze and model the MPC amplitude behavior, based on channel measurements. In this regard, the dependency of the amplitude on the incident angle of the signal at a reflecting surface is analyzed. The channel model is related to kernel functions used in GP that describe the similarities between different data points. Based on the model parameters, the amplitudes of MPCs are predicted at other positions of the receiver that have not been measured in the experiment. The method can then be used to predict a UWB channel impulse response at an arbitrary position in the environment.
{"title":"Gaussian Process Modeling of UWB Multipath Components","authors":"An Hong, M. Rath, Josef Kulmer, Stefan Grebien, Khang Nguyen Van, K. Witrisal","doi":"10.1109/CCE.2018.8465704","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465704","url":null,"abstract":"In the field of radio channel modelling, the consideration of ultra-wideband (UWB) signals allows for a channel description that can be decomposed into deterministic multipath components (MPCs) and dense / diffuse multipath. In this paper, deterministic MPCs are studied. A Gaussian Process (GP) model is used as a regression tool to analyze and model the MPC amplitude behavior, based on channel measurements. In this regard, the dependency of the amplitude on the incident angle of the signal at a reflecting surface is analyzed. The channel model is related to kernel functions used in GP that describe the similarities between different data points. Based on the model parameters, the amplitudes of MPCs are predicted at other positions of the receiver that have not been measured in the experiment. The method can then be used to predict a UWB channel impulse response at an arbitrary position in the environment.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132538698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465750
H. Vo
This study proposes an architecture using two series memristor circuits as synapses to install the weights of the artificial neural network. Two series memristor circuit is similar to half-bridge circuit so here only to create positive weights in the range [0;1]. The use of two memristor circuit will decrease 50% the number of memristor. By proposed memristor circuit, we exploit back-propagation algorithm to train a three-bit odd parity on-chip hardware instead of software implementation.
{"title":"Training On-chip Hardware with Two Series Memristor Based Backpropagation Algorithm","authors":"H. Vo","doi":"10.1109/CCE.2018.8465750","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465750","url":null,"abstract":"This study proposes an architecture using two series memristor circuits as synapses to install the weights of the artificial neural network. Two series memristor circuit is similar to half-bridge circuit so here only to create positive weights in the range [0;1]. The use of two memristor circuit will decrease 50% the number of memristor. By proposed memristor circuit, we exploit back-propagation algorithm to train a three-bit odd parity on-chip hardware instead of software implementation.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127494919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465728
Hieu Le Dinh, I. Temkin
This paper represents a new method optimal parameters PID based on nature inspired optimization algorithms application speed control of phases Permanent Magnet Synchronous Motors (PMSM). The methods for speed control stabilization of the PMSM using the Adaptive Particle Swarm Optimization controllers (APSO) and Hybrid Bacterial Foraging Particle Swarm Optimization controllers (BFPSO). The response results of the speed control PMSM Servo Systems used APSO and BGPSO methods are compared and the conclusions are given by simulation.
{"title":"Application of PSO and Bacterial Foraging Optimization to Speed Control PMSM Servo Systems","authors":"Hieu Le Dinh, I. Temkin","doi":"10.1109/CCE.2018.8465728","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465728","url":null,"abstract":"This paper represents a new method optimal parameters PID based on nature inspired optimization algorithms application speed control of phases Permanent Magnet Synchronous Motors (PMSM). The methods for speed control stabilization of the PMSM using the Adaptive Particle Swarm Optimization controllers (APSO) and Hybrid Bacterial Foraging Particle Swarm Optimization controllers (BFPSO). The response results of the speed control PMSM Servo Systems used APSO and BGPSO methods are compared and the conclusions are given by simulation.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127653340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465726
Ibrahim Freewan, J. Daigle, Feng Wang
This paper discusses distribution of content to mobile users via small cells (SCs) in 5G. Users may simultaneously access between one and some maximum number of SCs. Files are stored in remote locations as a collection of source symbols and some number of RaptorQ-encoded symbols generated from these source symbols are cached in the SCs. Each file is characterized by the number of encoded symbols required to reconstruct the file at the user equipment and its download preference probability. Users recover the file by downloading a number of encoded symbols slightly larger than the number of source symbols. If a sufficient number of encoded symbols are not available from the SCs, the remainder are backhauled. Presented in this paper is an algorithm of low complexity to maximize the average value of using cache to reduce backhaul. This paper contributes to the literature by presenting an n log n algorithm to solve the optimization problem exactly, extending previous results from constant files size for all files to arbitrary actual files sizes for all files, and extending distribution portions from continuous fractions of files to an integer number of symbols.
{"title":"Maximizing Cache Value for Distributing Content via Small Cells in 5G","authors":"Ibrahim Freewan, J. Daigle, Feng Wang","doi":"10.1109/CCE.2018.8465726","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465726","url":null,"abstract":"This paper discusses distribution of content to mobile users via small cells (SCs) in 5G. Users may simultaneously access between one and some maximum number of SCs. Files are stored in remote locations as a collection of source symbols and some number of RaptorQ-encoded symbols generated from these source symbols are cached in the SCs. Each file is characterized by the number of encoded symbols required to reconstruct the file at the user equipment and its download preference probability. Users recover the file by downloading a number of encoded symbols slightly larger than the number of source symbols. If a sufficient number of encoded symbols are not available from the SCs, the remainder are backhauled. Presented in this paper is an algorithm of low complexity to maximize the average value of using cache to reduce backhaul. This paper contributes to the literature by presenting an n log n algorithm to solve the optimization problem exactly, extending previous results from constant files size for all files to arbitrary actual files sizes for all files, and extending distribution portions from continuous fractions of files to an integer number of symbols.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129063374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465759
Juho Park, Jihyung Kim, J. Lee, Junhwan Lee
Utilizing wide bandwidth available in the millimeter wave channel is a promising candidate for the 5G and beyond 5G wireless sytems. To overcome severe channel degradation in millimeter wave channel, adopting massive MIMO with directional beamforming is essential, and base station and user should acquire best analog transmit/receive beam pair to establish a reliable link. The best analog transmit/receive beam pairs are found by maximizing a performance metric over the whole bandwidth. For efficient use of wideband in mmWave channel and to save energy at user, bandwith part (BWP) is adopted in NR which the user can be configured to use only a part of whole bandwith. With BWP, a user cannot use whole frequency information for best analog beam selection. In this paper, we have studied the impact of partial use of sub-carriers on the best analog transmit/receive beam selection.
{"title":"On the optimal beam selection with partial subcarriers on wideband mmWave systems","authors":"Juho Park, Jihyung Kim, J. Lee, Junhwan Lee","doi":"10.1109/CCE.2018.8465759","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465759","url":null,"abstract":"Utilizing wide bandwidth available in the millimeter wave channel is a promising candidate for the 5G and beyond 5G wireless sytems. To overcome severe channel degradation in millimeter wave channel, adopting massive MIMO with directional beamforming is essential, and base station and user should acquire best analog transmit/receive beam pair to establish a reliable link. The best analog transmit/receive beam pairs are found by maximizing a performance metric over the whole bandwidth. For efficient use of wideband in mmWave channel and to save energy at user, bandwith part (BWP) is adopted in NR which the user can be configured to use only a part of whole bandwith. With BWP, a user cannot use whole frequency information for best analog beam selection. In this paper, we have studied the impact of partial use of sub-carriers on the best analog transmit/receive beam selection.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122995833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/CCE.2018.8465720
V. B. Surya Prasath, D. N. Thanh, N. H. Hai
Regularization methods are effective in to solving ill-posed vision problems such as image denoising and restoration. These methods typically involve a smoothness/regularization term (prior) and a data term (fidelity). The importance of the regularization parameter that weights the smoothness prior term is well known in the image processing literature. In this work, we consider a particular class of adaptive regularization terms, which depend on the inverse gradient of the image. A pre-smoothing operation with Gaussian kernel is performed in computing the inverse gradient based adaptive regularization term with a fixed scale. However, in general, digital images contain objects of varying sizes, hence a multiscale regularization can improve the edge preserving restorations. We study here a comparison of single scale versus multiscale inverse gradient regularization parameter selection in image restoration along with quadratic and total variation regularization priors. Our experimental results conducted on standard test images indicate that using multiscale strategy improves the restoration quality both in terms of noise reduction and structure preservation. This assertion is augmented by various error metrics such as peak signal to noise ratio, and structural similarity.
{"title":"Regularization Parameter Selection in Image Restoration with Inverse Gradient: Single Scale or Multiscale?","authors":"V. B. Surya Prasath, D. N. Thanh, N. H. Hai","doi":"10.1109/CCE.2018.8465720","DOIUrl":"https://doi.org/10.1109/CCE.2018.8465720","url":null,"abstract":"Regularization methods are effective in to solving ill-posed vision problems such as image denoising and restoration. These methods typically involve a smoothness/regularization term (prior) and a data term (fidelity). The importance of the regularization parameter that weights the smoothness prior term is well known in the image processing literature. In this work, we consider a particular class of adaptive regularization terms, which depend on the inverse gradient of the image. A pre-smoothing operation with Gaussian kernel is performed in computing the inverse gradient based adaptive regularization term with a fixed scale. However, in general, digital images contain objects of varying sizes, hence a multiscale regularization can improve the edge preserving restorations. We study here a comparison of single scale versus multiscale inverse gradient regularization parameter selection in image restoration along with quadratic and total variation regularization priors. Our experimental results conducted on standard test images indicate that using multiscale strategy improves the restoration quality both in terms of noise reduction and structure preservation. This assertion is augmented by various error metrics such as peak signal to noise ratio, and structural similarity.","PeriodicalId":118716,"journal":{"name":"2018 IEEE Seventh International Conference on Communications and Electronics (ICCE)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117176294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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