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IEEE International Conference on Consumer Electronics (ICCE)

作者： Seungyong Ko Soohwan Yu Wonseok Kang Donggyun Kim Joonki Paik Image Processing and Intelligent System Laboratory Graduate School of Advanced Imaging Science

Recently, the various low-light enhancement methods have been proposed for consumer electronic devices. Although the existing methods provide the better brightness enhancement results, these methods generate the flicker effects during the video enhancement process. Flicker effects are caused by ignoring the correlation information between adjacent frames (i.e. inter-frames). To minimize the flicker effects, the proposed method uses the patch-similarity and adaptive accumulation in the inter-frames domain, and it makes the mean brightness values of enhanced video frames be preserved. The experimental results show that the proposed method can better improve the video frames without flicker effects than existing enhancement methods, and it can be applied to the image signal processing (ISP) chain for consumer electronic devices.

关键词： image color analysis Streaming media Consumer electronics Brightness Dynamic range Signal to noise ratio Distortion

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Coarse to Fine: Progressive and Multi-Task Learning for Salient Object Detection

Coarse to Fine: Progressive and Multi-Task Learning for Sali...

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International Conference on Pattern Recognition

作者： Donggoo Kang Sangwoo Park Joonki Paik Image Processing and Intelligent System Laboratory Chung-Ang University Seoul Korea

Most deep learning-based salient object detection (SOD) methods tried to manipulate the convolution block to effectively capture the context of object. In this paper, we propose a novel method, called progressive and mutl-task learning scheme, to extract the context of object by only manipulating the learning scheme without changing the network architecture. The progressive learning scheme is a method to grow the decoder progressively in the train phase. In other words, starting from easier low-resolution layers, it gradually adds high-resolution layers. Although the progressive learning successfully captures the context of object, its output boundary tends to be rough. To solve this problem, we also propose a multi-task learning (MTL) scheme that processes the object saliency map and contour in a single network jointly. The proposed MTL scheme trains the network in an edge-preserved direction through an auxiliary branch that learns contours. The proposed a learning scheme can be combined with other convolution block manipulation methods. Extensive experiments on five datasets show that the proposed method performs best compared with state-of-the-art methods in most cases.

关键词： Convolution Object detection Network architecture Decoding Pattern recognition Task analysis

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Non-dyadic lens distortion correction and enhancement of fish-eye lens images

Non-dyadic lens distortion correction and enhancement of fis...

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IEEE International Conference on Consumer Electronics (ICCE)

作者： Jinho Park Donggyun Kim Daehee Kim Joonki Paik Image Processing and Intelligent System Laboratory Chung-Ang University Seoul Korea

ISBN: (纸本)9781479975440

In this paper, a novel image enhancement method is presented for a fish-eye lens camera. In order to remove jagging and blur artifacts that are generated by a correction process of geometric lens distortion, the proposed method searches similar patches in a non-dyadic scale space. For further enhancing the artifact-removed image, a self-example-based image restoration is also used. Experimental results show that the proposed method can successfully remove not only geometric distortion of a fish-eye lens but also jagging and blur artifacts in the corrected image.

关键词： Lenses image enhancement Mathematical model Conferences Consumer electronics Imaging image restoration

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Point Cloud Generation Using Deep Local Features for Augmented and Mixed Reality Contents

Point Cloud Generation Using Deep Local Features for Augment...

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IEEE International Conference on Consumer Electronics (ICCE)

作者： Sohee Lim Minwoo Shin Joonki Paik Image Processing and Intelligent System Laboratory Chung-Ang University Seoul Korea

ISBN: (数字)9781728151861

ISBN: (纸本)9781728151878

With the commercialization of 5G network and the mounted of 3D sensor such as ToF on smartphones, augmented and mixed reality (AR/MR) technology has attracted increasing attention. AR/MR contents need 3D data in various models to interact with human users. However, creating a 3D model is a complicated and expensive process involving 3D acquisition, 3D reconstruction, and rendering with computer graphics techniques. To solve that problem, we use an autoencoder to extract local information. We then train the latent space in a generative adversarial network (GAN). The GAN takes local context from the latent variable, and then generates a point cloud of various robust shapes. The proposed method can generate a novel 3D model that can significantly save computational load to render AR/MR contents.

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Pre-Activated 3D CNN and Feature Pyramid Network for Traffic Accident Detection

Pre-Activated 3D CNN and Feature Pyramid Network for Traffic...

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IEEE International Conference on Consumer Electronics (ICCE)

作者： Hyunwoo Kim Seokmok Park Joonki Paik Image Processing and Intelligent System Laboratory Chung-Ang University Seoul Korea

ISBN: (数字)9781728151861

ISBN: (纸本)9781728151878

In this paper, we present a novel traffic accident detection method using a spatio-temporal three-dimensional (3D) convolutional neural network. The proposed method consists of pre-activation ResNet and feature pyramid network (FPN) structure. To reduce computational load with preserving the detection accuracy, we propose interval input method. Experimental results show that the proposed network outperforms existing methods in the sense of both precision and recall measures.

关键词： Accidents Three-dimensional displays Feature extraction Residual neural networks Conferences Computer vision Control systems

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The trading between virtual mobile operator and wireless service provider in the two-tier Femtocell network

The trading between virtual mobile operator and wireless ser...

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8th International Conference on Wireless Algorithms, systems, and Applications, WASA 2013

作者： Yang, Fan Yang, Bo Guan, Xinping Department of Automation Shanghai Jiao Tong University China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Jiao Tong University China Key Laboratory of Education Ministry for Image Processing and Intelligent Control Shanghai Jiao Tong University China

ISBN: (纸本)9783642397004

This paper considers the problem that the virtual mobile operator (VMO) buys services from the wireless service provider (WSP) to serve its users. When faced with poor indoor coverage or at the edge of marcocell, the WSP would ask nearby femto base stations (FBSs) to help serve the VMO. We focus on the interesting questions when the WSP prefers to ask help from FBSs and how WSP, VMO and FBSs adjust their strategies to maximize their profits. A two-stage Stackelberg game is built for the situation when the WSP serve the VMO by itself and a four-stage Stackelberg game is considered when the WSP rents FBSs by offering spectrum bands to FBSs. We firstly define the utility functions of VMO, WSP and FBSs to reflect their satisfaction and cost in participating into the game and then give the analysis based on the backward induction method. Meanwhile, the competition among FBSs when the WSP allocates spectrum bands for FBSs' help is formulated as a non-cooperative spectrum competition game (NSCG) and the existence and uniqueness of the Nash equilibrium in NSCG is proved. Simulation results of the two service modes show the WSP can obtain more profits through renting FBSs in poor coverage areas. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Profitability

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Performance Analysis of NOMA-Based Cooperative Networks with Relay Selection

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China Communications 2020年第11期17卷 111-119页

作者： Ronglan Huang Dehuan Wan Fei Ji Hua Qing Jie Li Hua Yu Fangjiong Chen Guangxi Colleges and Universities Key Laboratory of Image Processing and Intelligent Information System Wuzhou UniversityWuzhou 543002China Guangdong University of Finance Guangzhou 510521China School of Electronic and Information Engineering South China University of TechnologyGuangzhou 510641China Key Laboratory of Marine Environmental Survey Technology and Application Ministry of Natural ResourcesGuangzhou510300China

Non-orthogonal multiple access(NOMA)technique is an expert on channel differences *** this paper,a dual-hop NOMA-based cooperative relaying network where a best relay is selected as an active node to accomplish the communication between a source and a destination is *** assume that both decode-and-forward(DF)and amplify-and-forward(AF)protocols are applied to the selected *** metrics that ergodic sum-rate and outage probability are investigated,and the closed-form expressions of the latter for DF and AF protocols are *** and simulation results are conducted to verify the validity of the theoretical analysis,in which we can see that the NOMA based DF relaying is better than the NOMA based AF relaying and other existing NOMA-based cooperative communication schemes.

关键词： non-orthogonal multiple access(NOMA) decode-and-forward(DF) amplify-and-forward(AF) relay selection ergodic sum-rate outage probability

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Reaching Non-Negative Edge Consensus of Networked Dynamical systems

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IEEE TRANSACTIONS ON CYBERNETICS 2018年第9期48卷 2712-2722页

作者： Wang, Xiao Ling Su, Housheng Chen, Michael Z. Q. Wang, Xiao Fan Chen, Guanrong College of Automation Nanjing University of Posts and Telecommunications Nanjing China School of Automation Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Wuhan China School of Automation Nanjing University of Science and Technology Nanjing China Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai China Department of Electronic Engineering City University of Hong Kong Hong Kong

In this paper, the problem of non-negative edge consensus of undirected networked linear time-invariant systems is addressed by associating each edge of the network with a state variable, for which a distributed algorithm is constructed. Sufficient conditions referring only to the number of edges are derived for non-negative edge consensus of the networked systems. Subsequently, the linear programming method and a low-gain feedback technique are introduced to simplify the design of the feedback gain matrix for achieving the non-negative edge consensus. It is found that the low-gain feedback technique has a good effect on the non-negative edge consensus of the networked systems subject to input saturation. Numerical simulations are presented to verify the effectiveness of the theoretical results.

关键词： Distributed algorithm line graph low-gain feedback networked system non-negative edge consensus

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G-Strong Chain Recurrent Point And G-Chain Equivalent Point of Topological G-Conjugacy On Metric G-Space

G-Strong Chain Recurrent Point And G-Chain Equivalent Point ...

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2019虚拟现实与智能系统国际会议

作者： Ji Zhan-jiang Tu Jing-xian School of Data Science and Software Engineering Wuzhou University Guangxi Colleges and Universities Key Laboratory of Image Processing and Intelligent Information System Wuzhou University Guangxi Colleges and Universities Key Laboratory of Professional Software Technology Wuzhou University

ISBN: (纸本)9781728150505

In this paper,we study the dynamical properties of Gstrong chain recurrent point,G-chain point set and G-chain equivalent point of topological G-conjugacy on metric *** inference,we give the following conclusions that if let f:X→X and f:Y→Y be two continous map of metric G-space X and *** the map h:X→Y is a topogical G-conjugacy from f to f,then（1） h(SCR（f）)=SCR（f）;（2） h(S（x,f）)=S(h（x）,f);（3）h(CE（x,f）)=CE(h（x）,f).These results will enrich the theory of G-strong chain recurrent point,G-chain point and G-chain equivalent point of topological G-conjugacy on metric G-space

关键词： metric G-space topological G-conjugacy G-strong chain recurrent point G-chain point G-chain equivalent point

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The research of the accessibility and transitivity of topological group

The research of the accessibility and transitivity of topolo...

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2020 International Conference on Virtual Reality and intelligent systems, ICVRIS 2020

作者： Zhan-Jiang, Ji Wei, Shi Wuzhou University School of Information and Electronic Engineering China Guangxi Colleges Universities Key Laboratory of Image Processing and Intelligent Information System Wuzhou University China Guangxi Colleges China Wuzhou Vocational College China

ISBN: (纸本)9781728196367

The accessibility and transitivity have an important significance in terms of theory and application. The concept of the accessibility and transitivity are introduced in this paper. We study their dynamical properties. The following result are obtained: (l)Let (K , G ) be the hyperspace of (X , G ). Then ( X , G ) is accessible if and only if (K , G ) is accessible;(2) Let (K , G) be the hyperspace of (X , G). Then (X , G ) is transitive if and only if (K , G ) is transitive. These results enriched the theory of the accessibility and transitivity of topological group. © 2020 IEEE.

关键词： Accessibility Topological group Transitivity

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