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检索条件"任意字段=4th Conference on Mathematics of Image and Data Coding, Compression, and Encryption"

共 249 条记录，以下是141-150 订阅

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3-Level Security Based Spread Spectrum image Steganography with Enhanced Peak Signal to Noise Ratio 4

3-Level Security Based Spread Spectrum Image Steganography w...

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4th International conference on image Information Processing (ICIIP)

作者： Yadav, Poonam Dutta, Maitreyee NITTTR Dept Elect & Commun Engn Chandigarh India NITTTR ETV Dept Chandigarh India

ISBN: (纸本)9781509067343

this research elucidate a method of enhancing peak signal to noise ratio and minimizing mean square error through spread spectrum image steganography. the center of focus is more onto security, for that three levels of security have been designed which are as follows: First level indicates security of hidden text inside cover media by RSA encryption with Diffie-Hellman Key exchange algorithm, Second level of security is maintained by compressing the data to be hidden using Run length Encoding (a lossless compression). Further the communication is kept more secured by spreading the message all over the pixels of cover media using pseudo random generator that generates random locations of pixels in an image and embedding message with Least Significant Bit algorithm to make it highly indiscernible. With this technique PSNR of 71.347 dB and MSE of 0.0048 achieved with compression ratio 0.5 and BER of 0.0171.

关键词： Steganography Cryptography RSA RLE Diffie-Hellman LSB Spread Spectrum

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image compression scheme based on region of interest recognition 4

Image compression scheme based on region of interest recogni...

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4th International conference on Electronic Communication, Computer Science and Technology, ECCST 2024

作者： Wu, Dawei Bai, Enjian College of Information Science and Technology Donghua University Shanghai201620 China

With the development of networks, many fields now demand higher quality in specific image areas, such as main characters in photos, lesion areas in medical images, and features in remote sensing. At the same time, these fields need to manage data storage and transmission effectively for subsequent analysis and application. In order to meet the demand for image compression in modern society, this paper proposes an image compression scheme based on region of interest (ROI) recognition, dividing images into ROI and non-ROI regions and processing them with lossless and lossy compression, respectively, to improve efficiency and ensure ROI quality. the scheme uses the object detection network YOLOv4 to recognize the ROI of the image, designs an image block difference transformation to transform the image pixels into smaller values, designs a lossless DC encoding for the ROI of the image based on the difference between adjacent pixels, and designs a lossy DC encoding with quantization coding for the non-ROI of the image. Experimental analysis of uncompressed images shows the scheme effectively enhances compression efficiency while maintaining ROI quality, proving its practical value. © Published under licence by IOP Publishing Ltd.

关键词： Pixels

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A high payload data hiding scheme for color image based on BTC compression technique

A high payload data hiding scheme for color image based on B...

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International conference on Genetic and Evolutionary Computing

作者： Chou, Yung-Chen Chang, Hon-Hang Department of Computer Science and Information Engineering Asia University Taichung 41354 Taiwan Department of Photonics and Communication Engineering Asia University Taichung 41354 Taiwan

ISBN: (纸本)9780769542812

In the daily life, secret data delivery is an important application for private communication among parties over computer networks. data embedding technique is a good way to achieve the secret data delivery. A color image is a popular cover medium used to send the secret. Block truncation coding (BTC) is a lossy image compression method, which can significantly reduce the image size. In this paper, a novel data embedding method is proposed to conceal secret data into color BTC compression code. To compare with Chang et al.'s method, the proposed method can effectively generate a common bitmap for saving the size of the compressed image. Furthermore, the proposed method can conceal more than four secret bits into a block in average. From experimental results, the proposed method not only successful achieves the goal of secret data delivery but also significantly reduces the cost of common bitmap generation. © 2010 IEEE.

关键词： Color

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ICIIS 2009 - 4th International conference on Industrial and Information Systems 2009, conference Proceedings

ICIIS 2009 - 4th International Conference on Industrial and ...

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4th International conference on Industrial and Information Systems 2009, ICIIS 2009

ISBN: (纸本)9781424448371

the proceedings contain 110 papers. the topics discussed include: an end to end correctness verification approach for application specific usage control;a novel and efficient cryptosystem for long message encryption;human iris pattern recognition using phase components of image;secured communication using steganography framework with sample RTF implementation;a modified remote user authentication scheme using smart card based on ECDLP;a random block length based cryptosystem through multiple cascaded permutation - combinations and chaining of blocks;network coding-aware data aggregation for a distributed wireless sensor network;power line intercom - narrowband voice communication over power line;Ethernet frame tunneling over GPRS/EDGE for universal network monitoring;transcoding based optimum quality video streaming under limited bandwidth;and total traceability system: a sustainable approach for food traceability in SMEs.

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Implementation of SPIHT and WDR algorithms for natural and artificial images using wavelets

Implementation of SPIHT and WDR algorithms for natural and a...

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4th International conference on Computational Intelligence and Communication Networks, CICN 2012

作者： Singh, Priyanka Singh, Priti India

ISBN: (纸本)9781467329811

the objective of this paper is to implement SPIHT and WDR image coder. We have used here two different images Natural and Artificial. Artificial image stand for image on which enhancement techniques have been applied e.g Wallpaper whereas Natural image is an image on which no enhancement technique has been applied e.g image captured by camera directly. SPIHT stands for Set Partitioning in Hierarchical Trees (SPIHT) coding. the SPIHT coder is a highly refined version of the EZW algorithm and is a powerful image compression algorithm that produces an embedded bit stream from which the best reconstructed images in the mean square error sense can be extracted at various bit rates. Some of the best results - highest PSNR values for given compression ratios for a wide variety of images have been obtained with SPIHT. Hence, it has become the benchmark state-of-the-art algorithm for image compression. One of the defects of SPIHT is that it only implicitly locates the position of significant coefficients. this makes it difficult to perform operations which depend on the position of significant transform values, such as region selection on compressed data. Region selection, also known as region of interest (ROI), means a portion of a compressed image that requires increased resolution. Such compressed data operations are possible with the WDR algorithm of Tian and Wells. the term difference reduction refers to the way in which WDR encodes the locations of significant wavelet transform values. Although WDR will not produce higher PSNR values than SPIHT. With the implementation of these algorithms we have calculated the various parameters e.g. CR, PSNR, BPP & MSE to analyze PQS (picture Quality Scale). We have analyzed our results using various wavelet filters such as Biorthogonal, Coif lets, Daubechies and Symlets etc. © 2012 IEEE.

关键词： image compression

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Reversible data hiding in images: a brief survey 4

Reversible data hiding in images: a brief survey

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4th International conference on Advances in Computer Technology, Information Science and Communications, CTISC 2022

作者： Di, Fuqiang Kong, Yongjun Yang, Pan Wang, Zexi Ge, Yu Li, Min Engineering University of Pap Xi'an China Engineering University of Rf Xi'an China

ISBN: (数字)9781665458726

ISBN: (纸本)9781665458726

Reversible data hiding technology is an important branch of information hiding technology, and has become an important means to solve problems in information security and privacy protection. With the increasing demand of image content security and privacy protection, reversible data hiding in images has attracted more and more attention from both the academic and industry community in recent years. this paper introduces the basic concept and background of this technology, and summarizes the research results and research status of this technology in recent years from three main types: spatial domain, compression domain and encryption domain. At last, the future development trend of this technology is prospected. © 2022 IEEE.

关键词： Cryptography

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A simple image encoding method with data lossless information hiding 10

A simple image encoding method with data lossless informatio...

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4th International conference on Uniquitous Information Management and Communication, ICUIMC'10

作者： Wang, Zhi-Hui Chang, Chin-Chen Li, Ming-Chu Lu, Tzu-Chuen School of Software Dalian University of Technology Liaoning China Department of Information Engineering and Computer Science Feng Chia University Taichung Taiwan Department of Information Management Chaoyang University of Technology Taichung Taiwan

ISBN: (纸本)9781605588933

In this paper, we propose a simple reversible data hiding method in the spatial domain for block truncation coding (BTC) compressed grayscale images. the BTC method compresses a block of a grayscale image to a bitmap and a pair of quantization numbers. the proposed method first embeds secret bits into a block by changing the order of those two quantization numbers. the compression rate is not enlarged by this embedding scheme. To further improve the hiding capacity, the proposed method embeds the secret bits into the bitmap of the block by exploiting the correlation characteristic of neighboring blocks' bitmap in natural images. the experimental results show that the proposed method achieves very good hiding capacity at low compression rate. © 2010 ACM.

关键词： Steganography

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A Chaotic Searchable image encryption Scheme Integrating with Block Truncation coding 4th

A Chaotic Searchable Image Encryption Scheme Integrating wit...

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4th International conference on Cloud Computing and Security (ICCCS)

作者： Jiang, Mingfang Sun, Guang Hunan First Normal Univ Dept Informat Sci & Engn Changsha 410205 Hunan Peoples R China Hunan Univ Finance & Econ Res Inst Finance & Econ Big Data Changsha 410073 Hunan Peoples R China

ISBN: (纸本)9783030000127;9783030000110

In order to provide secure retrieval for encrypted digital images in cloud-based system, a secure searchable image encryption algorithm based on Block Truncation coding (BTC) and Henon chaotic map is presented. Henon Chaotic map is used to encrypt two quantization levels of BTC compressed images, and a pseudo random sequence is created by chaotic map to scramble the bit plane of each sub-block. the feature value of each sub-block is computed according to the relationship between the number of 1s and 0s in the corresponding bit plane. the encrypted image retrieval can be achieved by comparing the normalized correlation coefficients between the feature vectors. Experimental results show that the proposed scheme has satisfactory retrieval accuracy and security. Meanwhile, it has low computational cost and can be used for encrypted images retrieval in the cloud.

关键词： Searchable image encryption Henon chaotic map Block Truncation coding

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ECC based biometric encryption of compressed image for security over network channels

ECC based biometric encryption of compressed image for secur...

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4th International conference on Signal and image Processing 2012, ICSIP 2012

作者： Prasanalakshmi, B. Kannammal, A. Department of CSE Thirumalai Engineering College Kanchipuram India Coimbatore Institute of Technology Coimbatore India

ISBN: (纸本)9788132209997

this paper provides a way for secure transmission of data over networks. the security is initialized by means of using biometric data as private key, imposing the biometric data compression using 5- level Discrete wavelet transform is a way to minimize the key length, which were of large length as the standard requirements for implementing via RSA based hardware and software. As additional security measure Elliptic curve cryptography is used to encrypt the biometric data that is to be stored in and accessed from the database over networks. © 2013 Springer.

关键词： Biometrics

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Number-Based Strings/Passwords from Imaginary Graphs of Topological coding for encryption 4

Number-Based Strings/Passwords from Imaginary Graphs of Topo...

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4th IEEE Advanced Information Management, Communicates, Electronic and Automation Control conference, IMCEC 2021

作者： Wang, Hongyu Yao, Bing Su, Jing Zhang, Wanjia National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing100029 China College of Mathematics and Statistics Northwest Normal University Lanzhou730070 China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing100029 China Hotan Teachers College Xinjiang Uygur Autonomous Region848000 China

ISBN: (纸本)9781728185347

For letting graphic lattices approaching lattices, we define imaginary graphs and the leaf-splitting operation and the leaf-coinciding operation, and show an equivalent property: the leaf-splitting connectivity of a connected im-graph is equivalent to its edge connectivity. Using im-graphs produce complex degree-sequence lattices, graphic lattices, im-graphs in the integer decomposition problem, topological IoT-networks and data-functional IoT-networks. Each integer m with |m| ≥ 2 corresponds at least a graph or an im-graph. We try to build some connections between popular lattices and our lattices, and moreover propose some problems on Hanzi-writings lattices constructed by Chinese character coding. © 2021 IEEE.

关键词： Authentication

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