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Study on the difference of brain visual information processing between Parkinson's disease patients with hallucinations and healthy people based on EEG 3

Study on the difference of brain visual information processi...

引用

3rd International conference on Computer Science and communication Technology, ICCSCT 2022

作者： Qu, Liangcheng Liu, Chuan Yin, Kuiyin Zhang, Li Shen, Bo Nanjing Research Institute of Electronic Techology Jiangsu Najing China Department of Geriatrics Affiliated Brain Hospital of Nanjing Medical University Jiangsu Najing China

ISBN: (纸本)9781510661240

Computer vision is a mode task that uses computer to learn from training data and apply the learned experience to specific task. When patient experiences hallucinations, brain will call the memory stored in the hippocampus and process through specific pattern, and brain visual terminal will receive the image that does not exist in the real world. Patients with Parkinson's disease (PD) for more than 10 years are usually accompanied by hallucinations, which leads to changes in visual information processing and information perception pathway in brain. Electroencephalogram (EEG) is a spontaneous electrophysiological signal of the brain, which can reflect the working mechanism of the brain. In order to explore the changes of brain information perception pathway in PD, we recruited 5 PD patients with hallucinations, 5 healthy elderly and 5 healthy young subjects to participate visual classification experiment. The EEG collected in the experiment was analyzed by spectrum and brain network. The analysis found that the Delta, theta and alpha power of frontal lobe and occipital lobe in PD patients increased, the beta and gamma power decreased, and the brain fell into the internal circulation, the interaction between brain regions decreased. The lack of interaction may be one of the main causes of hallucinations. © 2022 SPIE.

关键词： Brain

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An enhannced technique for image steganography using 2-levels PVD

An enhannced technique for image steganography using 2-level...

引用

9th IASTED International conference on Signal and Image processing

作者： Jambi, Kamal Alnahdi, Salim King Abdulaziz Univ Fac Comp & Informat Technol Jeddah 21413 Saudi Arabia

ISBN: (纸本)9780889866751

Pixel-Value Differencing (PVD) for information hiding is proposed by Wu and Tsai. It is capable to hide large amount of data by using adaptive scheme. This paper presents a modified scheme based on Wu-Tsai's algorithm. The proposed method exploits the ability of performing embedding process twice for every pair of pixels. The sum and difference of block pixels facilitates restoring of the first stego-image. Results show an improvement in stego-image capacity by more than 30% compared with the original scheme. Comparing Stego-images after using both schemes illustrates that the proposed method can hide much more data information and maintain good visual quality.

关键词： steganography information hiding LSB PVD covert communication

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Research on the efficiency of visual communication in new media interface design 2021

Research on the efficiency of visual communication in new me...

引用

2nd International conference on Computers, information processing and Advanced Education, CIPAE 2021

作者： Yue, Jin Liu, Zeguo School of Design Xianyang Normal University Xianyang Shaanxi712000 China College of Information Engineering Xizang Minzu University Xianyang Shaanxi712082 China

ISBN: (纸本)9781450389969

In the new media, the design of visual communication interface can not only bring good visual experience for new media customers, but also effectively improve the efficiency of information retrieval and information transmission of media customers. However, there are some problems in most of the existing designs, such as insufficient attention and aesthetic ability. Therefore, this paper puts forward the research on the efficiency of visual communication in new media interface design. In this paper, the current situation of new media visual design is deeply studied, and the application of visual communication design in new media is analyzed. In view of the existing shortcomings, in order to improve the visual communication efficiency of new media, this paper focuses on the analysis of the basic characteristics of visual communication of new media, and puts forward the principle of readability. To upgrade the design scheme, we should pay attention to emotional tendency, ensure the unity of pictures and texts, and strengthen the interesting and interactive experience. In order to further understand the actual situation, this paper conducted a questionnaire survey. Through the analysis of the survey results, this paper believes that the new media interface visual design should pay more attention to the emotional experience of users, enrich the forms of expression, simplify the operation, and emphasize the practical performance, so as to effectively improve the efficiency of visual communication. © 2021 ACM.

关键词： visual communication

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3D SPATIAL RECONSTRUCTION AND communication FROM VISION FIELD

3D SPATIAL RECONSTRUCTION AND COMMUNICATION FROM VISION FIEL...

引用

IEEE International conference on Acoustics, Speech and Signal processing

作者： Cao, Xun Wang, Qifei Ji, Xiangyang Dai, Qionghai Tsinghua Univ TNlist Dept Automat Beijing 100084 Peoples R China

ISBN: (纸本)9781467300469

Vision field describes the real world visual information by summarizing the seven-dimensional plenoptic function into three domains: view, light, time, from which a better understanding of previous 3D capture and reconstruction systems can be provided. In this paper, we first show how to reconstruct 3D spatial information from all the three attributes of the vision field, namely full-space vision field reconstruction. Then, based on Laplacian iterative geometry prediction, a 3D mesh coding algorithm with cascaded quantization is presented to facilitate the communication of the reconstructed 3D models from vision field. At last, experimental results of both the 3D spatial reconstruction and the 3D mesh coding are demonstrated.

关键词： Three dimensional TV Animation Virtual Reality Predictive Coding

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A man-machine communication system based on the visual analysis of dynamic gestures

A man-machine communication system based on the visual analy...

引用

IEEE International conference on Image processing 2005, ICIP 2005

作者： Gastaldi, Giulia Pareschi, Alessandro Sabatini, Silvio P. Solari, Fabio Bisio, Giacomo M. Department of Biophysical and Electronic Engineering University of Genoa Via Opera Pia 11a 16145 Geneva Italy

ISBN: (纸本)0780391349

A perceptual human-machine interface based on visual appearence of hand movements is presented. Gestures are defined as the temporal evolution of 3D poses the of user's hand. Each gesture is described by five temporal sequences corresponding to the time evolution of the stereo depth information at the finger-tips. To this end feature processing directly exploits binocular disparity information considered in its full spatio-temporal dimension. Hidden Markov Models are used to represent the statistical properties of the gesture. The high recognition rate obtained by experimental testing on a five gesture alphabet validates the approach. © 2005 IEEE.

关键词： visual communication

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An image processing based visual compensation system for vision defects

An image processing based visual compensation system for vis...

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IIH-MSP 2009 - 2009 5th International conference on Intelligent information Hiding and Multimedia Signal processing

作者： Lai, Chin-Lun Chang, Shu-Wen Communication Engineering Department Oriental Institute of Technology Taipei Taiwan Ophthalmology Department Far Eastern Memorial Hospital Taipei Taiwan

ISBN: (纸本)9780769537627

This paper is dedicated to develop an integrated portable aiding system for the visually impaired, such as color blindness, low vision, or visual field defects. First, individual visual model, including the effective visual field, color response, and contrast sensitivity, for each user can be evaluated by the proposed test method first. Then the input video sequence can be adjusted accordingly to fit each user's visual model hence to compensate their perceptual defects. In combination with head mounted micro displays, it is shown that the proposed visual auxiliary system can improve their visual awareness of the surroundings and enhance their visual perception effectively. © 2009 IEEE.

关键词： Testing

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Design of Image processing System Based on DSP Core 5

Design of Image Processing System Based on DSP Core

引用

IEEE 5th International conference on Electronics and communication Engineering (ICECE)

作者： Zeng, Jing China West Normal Univ Sch Elect Informat Engn Nanchong Peoples R China

ISBN: (纸本)9781665487894

In recent years, with the development of digital technology, digital image processing has been widely and deeply applied in the field of computer graphics. Digital image processing system is a complex real-time system, it from the camera, fax machine and other scanning equipment to obtain image information, after digital transformation, digital image information coding, filtering, enhancement, recovery, compression, storage and other processing, finally generate visual image. This design uses TMS320C6748 as the core processor of the system, SAA7113 as the video decoding chip of the system, CPLD as the sampling controller, DDR2 chip as the external expansion memory. The ROM expansion uses NAND flash memory chip. On the basis of hardware design, combined with software algorithm to complete image processing. The system can be used in information communication, image recognition, news scene and other fields of image processing and transmission. This paper analyzes the hardware structure and data processing algorithm of the system in detail. The experimental results show that the system can not only obtain higher compression ratio, but also reduce the distortion of the reconstructed image. The image processing system has certain practicability.

关键词： core processor Digital image processing video decoding chip

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Audio-visual speaker localization for car navigation systems 8

Audio-visual speaker localization for car navigation systems

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8th International conference on Spoken Language processing, ICSLP 2004

作者： Zhang, Xianxian Takeda, Kazuya Hansen, John H.L. Maeno, Toshiki Robust Speech Processing Group Center for Spoken Language Research University of Colorado BoulderCO United States Graduate School of Information Science Nagoya University Nagoya Japan

Human-computer interaction for in-vehicle information and navigation systems is a challenging problem because of the diverse and changing acoustic environments. It is proposed that the integration of video and audio information can significantly improve dialog system performance, since the visual modality is not impacted by acoustic noise. In this paper, we propose a robust audio-visual integration system for source tracking and speech enhancement for an in-vehicle speech dialog system. The proposed system integrates both audio and visual information to locate the desired speaker source. Using real data collected in car environments, the proposed system can improve speech accuracy by up to 40.75% compared with audio data alone.

关键词： Speech enhancement

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Combining high speed digital audio-visual services and Internet services

Combining high speed digital audio-visual services and Inter...

引用

1997 International conference on information, communications and Signal processing - Trends in information Systems Engineering and Wireless Multimedia communications

作者： Cha, JH Choi, H Chun, W Chungnam Natl Univ Dept Comp Engn Taejon 305764 South Korea

ISBN: (纸本)0780336763

Audio visual services in public telecommunication networks and various Internet services are two of the most typical communication services in present days. To integrate these two services, DAVIC(Digital Audio visual Council) specifies the Internet access method. However, some functionality, such as Full Internet access, are not specified in detail and also DAVIC's method had not been reported to be implemented and provide Internet services. This paper proposes an architecture for DAVIC users to access Internet with its functional entities, service scenario, and protocols. The proposed method supports the Full Internet access service, in which a user in the Internet can initiate an Internet service toward a user of DAVIC system, as well as a DAVIC user can do the opposite direction. The architecture proposed here also suggests addressing and naming scheme in detail for realizing the Full Internet access method.

关键词： information services

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3-D visual data compression based on ray-space projection

3-D visual data compression based on ray-space projection

引用

1997 conference on visual communications and Image processing

作者： Naemura, T Kaneko, M Harashima, H Univ. of Tokyo (Japan)

ISBN: (纸本)0819424358

As 2-D image communication systems come into use widely, 3-D imaging technology enhancing the reality of visual communication is getting to be considered as a promising next-generation medium that can revolutionize information systems. To date, 3-D image communication has not been discussed at a comprehensive level because several kinds of promising 3-D display technologies are still making rapid progress. Considering such a situation, this paper introduces the concept of the ''Integrated 3-D visual communication System''. The key feature in this new concept is a display-independent neutral representation of visual data. The flexibility of this concept will promote the progress of 3-D image communication systems before the 3-D display technology reaches maturity. In this paper, for this purpose, ray-based approach is examined. In the present representation method, the whole ray data is equally treated as a set of orthogonal views of the scene objects. The advantage of this approach is to allow the synthesis of any perspective view by gathering appropriate ray data from the set of orthogonal views independently of any geometric representation. A real-time progressive transmission method has been also examined. The experimental results show how the present representation method could be applied to the next-generation 3-D image communication system.

关键词： 3-D image coding 3-D image processing virtual reality display-independent representation of visual data ray-space ray-based representation direction-uniform projection orthogonal views progressive coding image-based rendering

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