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17th African conference on Research in Computer Science and Applied Mathematics, CARI 2024

作者： Guenfoud, Nesrine Issad, Mohamed Debyeche, Mohamed Laboratory of Speech Communication and Signal Processing Faculty of Electrical Engineering Université des Sciences et de la Technologie Houari Boumediene USTHB Bab Ezzouar Algeria Centre de Développement des Technologies Avancées CDTA Baba Hassen Algeria

ISBN: (纸本)9783031882258

The Elliptic Curve Digital Signature Algorithm (ECDSA) is one of the most critical entities in the BlockChain (BC) network. This paper presents the Field Programmable Gate Array (FPGA) implementation of the ECDSA protocol for data transactions in the BC network. The ECDSA protocol is based on: (i) a True Random Number Generator (TRNG), (ii) a Scalar Multiplication (SM), and (iii) a Hash function. The execution of the SM algorithm is an iterative process. At each iteration, the following arithmetic operations are performed over a finite field Fp: Modular Addition (MA), Modular Subtraction (MS), Modular Multiplication (MM), and Modular Inversion (MI). In this work, we propose the implementation of the ECDSA using the HardWare/SoftWare (HW/SW) combination. The processor MicroBlaze (MB) is used for the flexibility. Since the MI operation is complex, the Jacobian projective coordinates system is used to overcome this operation. HW part of the proposed embedded system includes the accelerator cores MM, MI, Secure Hash Algorithm (SHA-256), and the TRNG. The controls of the ECDSA and SM as well as the computation of the MA and MS, are executed in SW by MB. The implementation results show that the execution times of 256-bit ECDSA signature and verification are 75 ms and 149 ms, respectively. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Hash functions

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Proceedings of the IADIS International conferences - Computer Graphics, visualization, Computer Vision and Image processing 2010, CGVCVIP 2010, visual communication 2010: Creative Industries, Photography and Culture, VC 2010, Web Virtual Reality and Three-Dimensional Worlds 2010, Web3DW 2010, Part of the IADIS Multi conference on Computer Science and information Systems 2010, MCCSIS 2010

Proceedings of the IADIS International Conferences - Compute...

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IADIS Int. Conf. - Computer Graphics, visualization, Computer Vision and Image processing, CGVCVIP 2010, visual Commun., VC 2010, Web Virtual Reality and Three-Dimensional Worlds, Web3DW 2010, Part of the MCCSIS 2010

ISBN: (纸本)9789728939229

The proceedings contain 82 papers. The topics discussed include: GPU-aware hybrid terrain rendering;time-curvature and time-torsion of virtual bubbles as fluid mixing indicators;a repartition structure for collision detection and deformation of discrete objects based on 3D wavelets;volume-based diffuse global illumination;contraction theory as method for the analysis and design of the stability of collective behavior in crowds;balloon cut layout based on a 3D balloon model;efficient virtual plant data structure for visualization and animation;comparison of bilateral filtering strategies for video processing in color and depth;marker-less computer vision tracking for augmented reality;a novel edge detection method based on image energy and skewness with application to intramuscular fat recognition;and texture feature representation on a coordinate system for efficient pattern classification.

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Impact of near-lossless and lossy coding on information extraction from hyperspectral data

Impact of near-lossless and lossy coding on information extr...

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conference on visual information processing and communication ii

作者： Miguel, Agnieszka Seattle Univ Seattle WA 98122 USA

ISBN: (纸本)9780819484192

We study the ability to derive meaningful information from decompressed imaging spectrometer data. Each hyperspectral band is linearly predicted by a previously transmitted band. The residual, formed by subtracting the prediction from the original data is compressed either with a near-lossless bit plane coder or with the lossy JPEG2000 algorithm. We investigate the effects of these two compression methods on hyperspectral image processing using whole-and mixed-pixel analysis techniques. Surprisingly, the lossy coder outperforms near-lossless method in terms of its impact on final hyperspectral data applications.

关键词： hyperspectral data compression near-lossless information extraction

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Research on Experimental Teaching information Collection Method of visual communication Specialty in Hybrid Universities Under Intelligent Terminal 5th

Research on Experimental Teaching Information Collection Met...

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5th EAI International conference on Advanced Hybrid information processing (ADHIP)

作者： Huang, Zhen-bin Sanda Univ Art Design & Media Coll Shanghai 201209 Peoples R China

ISBN: (纸本)9783030945510;9783030945503

In order to enhance the efficiency of information collection in experimental teaching of visual communication specialty and improve students' art design ability, this paper proposes a method of information collection in experimental teaching of visual communication specialty in hybrid Universities under intelligent terminal. The delay model of experimental teaching information collection is established, and the user delay under different modes is obtained. According to the residual value of all the information in the experimental teaching information processing node, the dynamic weight of each experimental teaching information is calculated, and the residual load capacity of the experimental teaching information processing node is estimated to achieve the balanced distribution of the experimental teaching information of visual communication specialty, This paper constructs the experimental teaching information collection mode of visual communication specialty in compound university to realize the experimental teaching information collection. The experimental results show that the method can meet different reliability requirements, has high acquisition accuracy and the effectiveness of redundant information filtering, and can promote the further improvement of students' art design ability.

关键词： Intelligent terminal Mixed colleges and universities visual communication major Experimental teaching information Collection method Art design

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Design of 3D Image visual communication System Based on Computer Image Technology 4th

Design of 3D Image Visual Communication System Based on Comp...

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4th International conference on Machine Learning, Image processing, Network Security and Data Sciences (MIND)

作者： Gou, Shuangxiao Mei, Ling Chongqing Univ Arts & Sci Coll Fine Arts & Design Chongqing 402160 Peoples R China Chongqing Water Resources & Elect Engn Coll Large Data Inst Chongqing 402160 Peoples R China

ISBN: (纸本)9783031243660;9783031243677

Computer imaging technology is a kind of use of digital photography, using a computer as amedium to realize interactive communication and interaction between humans and machines through the collection and processing of images and the editing and storage of graphic information. The purpose of this paper to study the design of the 3D image visual communication system based on computer image technology is to improve the mastery of 3D image technology and design the visual communication system. This article mainly uses experimental and comparative methods to analyze the feature extraction situation of the 3D image visual communication system, and finds that the error of the improved RANSAC algorithm in image feature extraction is about 54%, while the unimproved algorithm and other algorithms The error is greater. This shows that the improved algorithm proposed in this paper is incomparable in the 3D image visual communication system.

关键词： Computer image technology 3-dimensional image visual communication System design

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information EFFICIENCY IN visual communication 2

INFORMATION EFFICIENCY IN VISUAL COMMUNICATION

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CONF ON visual information processing 2

作者： ALTERGARTENBERG, R RAHMAN, ZU Old Dominion Univ. (United States) Science and Technology Corp. (United States)

ISBN: (纸本)0819411973

This paper evaluates the quantization process in the context of the end-to-end performance of the visual-communication channel. Results show that the trade-off between data transmission and visual quality revolves around the information in the acquired signal, not around its energy. Improved information efficiency is gained by frequency dependent quantization that maintains the information capacity of the channel and reduces the entropy of the encoded signal. Restorations with energy bit-allocation lose both in sharpness and clarity relative to restorations with information bit-allocation. Thus, quantization with information bit-allocation is preferred for high information efficiency and visual quality in optimized visual communication.

关键词： Quantization visualization information visualization Signal to noise ratio visual communications Data compression Image quality Signal processing visual information processing Image restoration

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In-person, video conference, or audio conference? Examining individual and dyadic information processing as a function of communication system

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JOURNAL OF communication 2024年第2期74卷 117-129页

作者： Han, Jingjing Cores-Sarria, Lucia Zhou, Han Fudan Univ Sch Journalism Shanghai Peoples R China Fudan Univ Inst Global Commun & Integrated Media Shanghai Peoples R China Fudan Univ Key Lab Data Sci Shanghai Peoples R China Univ Southern Denmark Digital Democracy Ctr Odense Denmark Univ Wisconsin Dept Commun Arts Madison WI USA

The wide use of virtual communication has raised a need to understand its effect on communication effectiveness and the ways its different forms influence users' information processing. To that end, this study proposes the Dynamical Interpersonal communication Systems Model and posits that the amount of information directly perceived affects individual and dyadic information processing. This proposition is tested by examining how visual information influences physiological patterns, known to underlie information processing, during in-person, video, and audio-only conferences. Results indicate that while audio-only communication sustained emotional intensity better, visual-based communication required less initial cognitive effort. visual information in combination with physical presence (in-person communication) resulted in consistently lower cognitive effort and stronger synchronization of positive emotions, compared to contexts involving visual but without embodied information (video communication). This study shows the importance of investigating interpersonal communication simultaneously across multiple systems and at the intra- and inter-personal levels.

关键词： video conference virtual communication interpersonal synchrony information processing cognitive effort

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Difference in visual information between face to face and telephone dialogues

Difference in visual information between face to face and te...

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1997 IEEE International conference on Acoustics, Speech, and Signal processing (ICASSP 97)

作者： Iwano, Y Sugita, Y Kasahara, Y Nakazato, S Shirai, K Waseda Univ Tokyo Japan

ISBN: (纸本)0818679204

In this research, we analyzed conversations between a pair of subjects, under two conditions. One is face to face conversation that has a visual contact, and the other is conversation through telephone line that has not. From the recorded videotape we extracted the subject's actions especially focusing on the head movements. By comparing the dialogues under two conditions, it seems that there are two types of head movements, one is intended to give a response to his partner and the other is to send some signal. We are going to analyze how visual information contributes in spoken dialogue perceptions, and possibility of adopting it in a multi-modal human interface.

关键词： visual communication

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Depth Map Coding Based on Color Motion information

Depth Map Coding Based on Color Motion Information

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conference on visual information processing and communication ii

作者： Oh, Byung Tae Wey, Ho-Cheon Park, Du-Sik Samsung Adv Inst Technol Multimedia Lab Gyeonggi Do South Korea

ISBN: (纸本)9780819484192

This paper presents an efficient depth map coding method based on color information in multi-view plus depth (MVD) system. As compared to the conventional depth map coding in which depth video is separately coded, the proposed scheme involves color information for depth map coding. In details, the proposed algorithm subsamples input depth data along temporal direction to reduce the bit-rate, and non-encoded depth frames are recovered at the decoder side guided by the motion information extracted from the decoded color video. The simulation results shows the high coding efficiency of the proposed scheme, and it also shows that recovered depth frame are not much different from the reconstructed one. Furthermore, it can even provide temporally consistent depth map which results in better subjective quality for view-interpolation.

关键词： Depth map Depth coding Joint coding Multi-view Free-view Multi-view plus Depth

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A STUDY ON MOUTH SHAPE-FEATURES SUITABLE FOR HMM SPEECH RECOGNITION USING FUSION OF visual AND AUDITORY information

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS communicationS AND COMPUTER SCIENCES 1995年第11期E78A卷 1548-1552页

作者： DOI, N SHINTANI, A HAYASHI, Y OGIHARA, A TAKAMATSU, S Univ of Osaka Prefecture Sakai-shi Japan

Recently, some speech recognition methods using fusion of visual and auditory information have been researched. In this paper, a study on the mouth shape image suitable for fusion of visual and auditory information has been described. Features of mouth shape which are extracted from gray level image and binary image are adopted, and speech recognition using linear combination method has been performed. From results of speech recognition, the studies on the mouth shape features which are effective in fusion of visual and auditory information have been performed. And the effectiveness of using two kinds of mouth shape features also has been confirmed.

关键词： SPEECH RECOGNITION FUSION OF visual AND AUDITORY information FEATURE OF MOUTH SHAPE IMAGE processing

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