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An image fusion method of multi-scale image based on HMM and genetic algorithms

Journal of Computational Information Systems 2015年第12期11卷 4367-4374页

作者： Jiang, Zetao Wu, Donghui The Institute of Computer Science and Engineering Guilin University of Electronic Technology Guilin China The Key Lab of Image Processing and Pattern Recognition of Jiangxi Province Nanchang Hangkong University Nanchang China

At present, in the field of pixel-level image fusion, researchers tend to treat each pixel independently, which destroys the relationship between the images to be fused. In view of this defects, this paper aims to propose a method for multi-scale image fusion based on Genetic Algorithm (GA) under the guidance of Hidden Markov Model (HMM). This fusion method is set on the following principles. First of all, the wavelet transformation (WT) of the two images to be fused will be conducted. And then establish HMM for the fusion coefficients from high to low in descending hierarchical order. Finally, guided by HMM, the author applies GA to searching hierarchically for the optimal fusion coefficient. With this method, the best fusion effect will be achieved. This method take good advantage of the correlation information between the images to be fused so as to improve the fidelity and accuracy of the fusion. Given this, the author makes an empirical analysis on this fusion method, which proves to be feasible and effective. ©, 2015, Binary Information Press. All right reserved.

关键词： Genetic algorithms

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RETRACTED: Dual-mode predictive flexible rotor control for active magnetic bearings with input constraints

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Journal of Vibration and Control 2016年第20期23卷 NP2页

作者： Yue Wu Jie Zhao Hai-Tao Zhang Ming-Can Fan Xi Yu Guangdong HUST Industrial Technology Research Institute Guangdong Province Key Lab of Digital Manufacturing Equipment ChinaKey Laboratory of Image Processing and Intelligent Control School of Automation State Key Laboratory of Digital Manufacturing Equipments and Technology Huazhong University of Science and Technology China Key Laboratory of Image Processing and Intelligent Control School of Automation State Key Laboratory of Digital Manufacturing Equipments and Technology Huazhong University of Science and Technology China Department of Mathematics Huizhou University China School of Electrical and Information Engineering Xi'an Technology University China

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3D avatar developments in real time and accuracy assessments

3D avatar developments in real time and accuracy assessments

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International Computer science and Engineering Conference, ICSEC 2014

作者： Bholsithi, Wisarut Wongwaen, Nonlapas Sinthanayothin, Chanjira Image Technology Lab National Electronics and Computer Technology Center National Science and Technology Development Agency Klong Luang Pathumthani Thailand

ISBN: (纸本)9781479949632

This paper focuses on an application motion control of avatar and accuracy measurements using Kinect. The development of this application has used C++ Builder as a compiler and libraries to connect with Kinect and show 3D virtual world and avatars. OpenNI library is to detect a depth image while NITE Primesense library is to connect with Kinect, and Chai3D to display virtual worlds and avatar (human motion models). The tests to measure the application performance consist of 2D-3D angular measurements and time delay measurements on motions between avatar and a controller. The paired T-Test results on angular measurements showed that 2D and 3D angular measurements can be substitutable depended on the positions between Kinect and a controller. Furthermore, comparisons by ratio between the time difference showed varies due to the motion factors, the number of vertices and the distance between Kinect and the controller. © 2014 IEEE.

关键词： Time delay

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Indoor Localization with Incomplete Observation Using Set-membership Filter

Indoor Localization with Incomplete Observation Using Set-me...

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International Symposium on Micro-NanoMechatronics and Human science

作者： Yuan Wang Jian Huang Key Lab of Image Processing and Intelligent Control School of Automation Huazhong University of Science and Technology

ISBN: (纸本)9781467382182

Indoor localization is a popular topic because of the poor performance of GPS in the indoor environment. This paper has provided a new method to achieve the goal of indoor localization. Combining the usage of posture sensors with the Radio Frequency Identification (RFID) technology, we solved the problem of plentiful tags in the traditional RFID indoor localization. The relative localization subsystem is based on posture sensors and the absolute localization subsystem is based on RFID. A set-membership theory based data fusion algorithm is proposed to fuse the data of relative localization and absolute localization. Experimental results show that the proposed data fusion algorithm could significantly reduce the accumulated error of our indoor localization system.

关键词： Ellipsoids Indoor environments RFID tags Filtering theory Filtering algorithms

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Controllable deoxyribonucleic acids sub-tile self-assembly by deoxyribonucleic acids strand displacement

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Journal of Computational and Theoretical Nanoscience 2015年第10期12卷 3774-3780页

作者： Wang, Yanfeng Zhao, Taotao Shi, Xiaolong Li, Mengmeng Cui, Guangzhao School of Electrical and Information Engineering Henan Key Lab of Information-Based Electrical Appliances Zhengzhou University of Light Industry Zhengzhou China Key Laboratory of Image Information Processing and Intelligent Control School of Automation Huazhong University of Science and Technology Wuhan China

Here we report a controllable four DNA sub-tiles, self-assembling into 4-arm DNA tiles, under control of a DNA strand displacement based on DNA sequential circuit. The motif is encoded, compiled and simulated successively in Visual DSD software. The simulation results show that the four kinds of sub-tiles in the motif combine to their neighbors one after another with a certain time delay and finally form into 4-arm DNA tiles. The formation of the 4th arm of a 4-arm DNA tile indicates that all the 4-arm DNA tiles have been assembled, which implies high productivity of the 4-arm DNA tiles. We also analyze the time responses of the DNA sequence circuit by adjusting the concentration proportions of reactants and/or ordering bind and unbind rates of toeholds in simulation. These simulation results demonstrate that high concentration proportions of reactants and/or toeholds reacting at ascending order rates can shorten the time response more sharply than that low concentration proportion of reactants and/or in a descending order. The motif furthers the integration for DNA sub-tile self-assembly and DNA strand displacement. Copyright © 2015 American Scientific Publishers.

关键词： DNA

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A visual complexity-sensitive DWT ordering scheme for hiding data in images

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Research Journal of Applied sciences, Engineering and technology 2014年第16期7卷 3286-3297页

作者： Iliyasu, Abdullah M. Al-Asmari, Awad Kh. Salama, Ahmed S. Al-Qodah, Mohammed A. Abd Elwahab, Mohamed A. Le, Phuc Q. Salman Bin Abdulaziz University Al Kharj Saudi Arabia Department of Computational Intelligence and Systems Science Tokyo Institute of Technology Japan Image and Signal Processing Lab King Saud University Saudi Arabia

A scheme is proposed to hide data in images based on a prioritized ordering of the content of the host (or cover) image. A watermark embedding process uses the watermark strength to determine the ordering of the 16 regions resulting from the second level Discrete Wavelet Transform (DWT) decomposed content of the host image. To determine the best ordering for hiding the data, various types of image of varying content and, hence, visual complexity were considered, analyzed and ranked in terms of their ability to withstand changes that do not imperil the visual quality (PSNR) of their watermarked versions depending on which an N×N-sized watermark stream is hidden in the 8 highest ranked sub-bands of the host image. From this perspective, an ordering for images classified as simple, normal and complex images was used to determine a generalized ordering of the DWT decomposed sub-bands of the image. The generalized ordering presented here ascertains that the content of the image and its visual complexity had little effect on an earlier proposed prioritized ordering of the DWT Sub-bands. To validate the veracity of the ordering scheme, 1000 images from the Corel 1000A database, their visual complexity and features were taken into account. The results confirmed that high embedding capacity, appreciable visual quality of watermarked images and complete recovery hidden data are realizable based on the ordering scheme proposed in this study. © Maxwell Scientific Organization, 2014.

关键词： Data hiding Discrete wavelet transform (DWT) image processing Information security Visual complexity Watermarking

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SUB-SAMPLED DICTIONARIES FOR COARSE-TO-FINE SPARSE REPRESENTATION-BASED HUMAN ACTION RECOGNITION

SUB-SAMPLED DICTIONARIES FOR COARSE-TO-FINE SPARSE REPRESENT...

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IEEE International Conference on Multimedia and Expo

作者： Jong Ho Lee Hyun-seok Min Jeong-jik Seo Wesley De Neve Yong Man Ro Image and Video Systems Lab Korea Advanced Institute of Science and Technology (KAIST)

ISBN: (纸本)9781479947607

Automatic human action recognition is a core functionality of systems for video surveillance and human-object interaction. However, the diverse nature of human actions and the noisy nature of most video content make it difficult to achieve effective human action recognition. To overcome the aforementioned problems, Sparse Representation (SR) has recently attracted substantial research attention. However, although SR-based approaches have proven to be reasonably effective, the computational complexity of the testing stage prohibits their usage by applications requiring support for real-time operation and a vast number of human action classes. In this paper, we propose a novel method for human action recognition, leveraging coarse-to-fine sparse representations that have been obtained through dictionary sub-sampling. Comparative experimental results obtained for the UCF50 dataset demonstrate that the proposed method is able to achieve efficient human action recognition, at no substantial loss in recognition accuracy.

关键词： Coarse-to-fine sparse representation Dictionary sub-sampling Human action recognition

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3D avatar developments in real time and accuracy assessments

3D avatar developments in real time and accuracy assessments

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International Computer science and Engineering Conference (ICSEC)

作者： Wisarut Bholsithi Nonlapas Wongwaen Chanjira Sinthanayothin Image Technology Lab National Science and Technology Development Agency Klong Luang Pathumthani Thailand

关键词： Three-dimensional displays Avatars Cameras Skeleton Delay effects Libraries Time measurement

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Consensus and rendezvous predictive control for multi-agent systems with input constraints

Consensus and rendezvous predictive control for multi-agent ...

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第三十三届中国控制会议

作者： Zhaomeng Cheng Hai-Tao Zhang Ming-Can Fan Key Laboratory of Image Processing and Intelligent Control School of AutomationState Key Lab of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and Technology

ISBN: (纸本)9781479947249

The discrete-time double-integrator consensus and rendezvous problems are both addressed for distributed multiagent systems with directed switching topologies and input *** develop model predictive control algorithms to achieve stable consensus or rendezvous provided that the proximity nets always have a directed spanning tree and the sampling period is sufficiently ***,the control horizon is extended to larger than one as well,which endows sufficient degrees of freedom to facilitate controller *** simulations are finally conducted to show the effectiveness of the control algorithms.

关键词： Model predictive control(MPC),Multi-agent system(MAS),consensus,switching topology,input constraints

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Biomechanical kidney model for predicting tumor displacement in the presence of external pressure load

Biomechanical kidney model for predicting tumor displacement...

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IEEE International Symposium on Biomedical Imaging

作者： Ivan Figueroa-Garcia Jean-Marc Peyrat Ghassan Hamarneh Rafeef Abugharbieh Biomedical Signal and Image Computing Lab University of British Columbia Vancouver BC Canada Qatar Science & Technology Park Qatar Robotic Surgery Centre Doha Qatar Medical Image Analysis Lab Simon Fraser University Vancouver BC Canada

Robot-assisted partial nephrectomy (RAPN) is a minimally invasive surgery for the treatment of renal cell carcinoma that consists of removing the portion of the kidney that contains the tumor. To plan the resection, surgeons rely on preoperative scans of the patient. However, at surgery time, the shape of abdominal organs differ from these images due to factors such as patient position, insufflation and manipulation with surgical instruments. In this work, we focus on the simulation of kidney deformation due to an external pressure load, e.g. during insufflation, to provide a better estimation of the tumor mass position that is particularly important to plan resection with proper margins. The CT scans of ex vivo lamb kidneys with artificial tumors and fiducials are acquired in absence of external pressure load. From these images, 3D tetra-hedral meshes of kidney parenchyma and tumor, as well as a triangular mesh of the capsule, are extracted and then used along with a soft tissue biomechanical model to simulate deformations under additional external pressure load. A second CT scan of the same kidneys under real pressure load are acquired as a reference to evaluate the advantage of simulating deformations over using the first CT scan without external pressure load. Results show that the biomechanical simulation improves by 29% the tumor localization.

关键词： Tumors Kidney Surgery Biological system modeling Load modeling Biomechanics Computed tomography

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