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2016 International Conference on Control Instrumentation Communication and Computational technologies, ICCICCT 2016

作者： Shunmugan, S. Rani, P. Arockia Jansi Dept of Computer Science and Engineering Manonmaniam Sundaranar University Tirunelveli India

ISBN: (纸本)9781509052400

This paper presents the concept of image compression after encryption and study about the various technologies applied on encryption-then-compression technology. It is also analyses the various secured compression technologies and can be applied to different types of images. This survey addresses the recipe for the secured image compression technologies based on JPEG, JPEG2000 and JPEG XR and presents the pros and cons of those secured image compression technologies. To choose the best technology for the secured image compression some general strategies are suggested based on this survey. The performance of these technologies are analysed by By analying compression Ratio (CR), Peak Signal-to-Noise Ratio (PSNR) and Mean Square Error (MSE). © 2016 IEEE.

关键词： image compression

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Crypto-compression of images based on Chaos

Crypto-Compression of Images based on Chaos

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6th International Conference on Sciences of Electronics, technologies of Information and Telecommunications (SETIT)

作者： Hajji, Jalel Ben Farah, Mohamed Amine Samet, Mounir Kachouri, Abdennaceur Sfax Univ Natl Engn Sch Sfax Lab Elect & Informat Technol Sfax Tunisia Gabes Univ Higher Inst Ind Syst Gabes Tunisia

ISBN: (纸本)9781467316583

In this paper we have proposed an image crypto-compression system that guarantees a secure storage and transfer while preserving the performance of the used compression method. Regarding compression, we have chosen to use the discrete cosine transformation (DCT), Huffman coding and RLE because of their efficiency and their use in most current crypto-compression systems. As for encryption, we have made the choice to use the chaos for its good cryptographic properties. Experimental results confirm that our system is efficient, secure and greatly improve the compression ratio of the image while maintaining the performance of the encryption algorithm.

关键词： compression chaos crypto-compression DCT encryption Huffman coding image RLE coding

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Research on wavelet-fractal coding of image sequence

Research on wavelet-fractal coding of image sequence

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Conference on image compression and encryption technologies

作者： Zhang, ZM Yu, S Tianjin Univ Inst TV & Image Informat Tianjin 300072 Peoples R China

In this paper, a new image sequence compression scheme combining wavelet with fractal is presented. It adopts the coding structure similar to MPEG's except replacing DCT transform with wavelet transform, and uses ... 详细信息

ISBN: (纸本)0819442798

关键词： sequence image coding fractal coding wavelet transformation wavelet-fractal coding

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Near-lossless image compression based on integer wavelet transforms

Near-lossless image compression based on integer wavelet tra...

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Conference on image compression and encryption technologies

作者： Moon, YS Tian, JW Chinese Univ Hong Kong Dept Comp Sci & Engn Shatin Hong Kong Peoples R China

ISBN: (纸本)0819442798

This paper discusses the constructing method of a general integer wavelet transform algorithm. Coupling such an algorithm with subblock differential pulse code modulation (DPCM), an encoding scheme for near-lossless image compression is obtained for remote sensing images. This method possesses the following features: (1) real-time processing is possible;(2) hardware implementation is easy;(3) the algorithm is of parallel structure;(4) only addition, subtraction and bit-shift are involved in the processing. Experiments illustrate that our algorithm is an effective encoding scheme to compress remote sensing images.

关键词： image compression integer wavelet transform Lift scheme near-lossless compression remote sensing image

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An efficient and secure partial image encryption for wireless multimedia sensor networks using discrete wavelet transform, chaotic maps and substitution box

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JOURNAL OF MODERN OPTICS 2017年第5期64卷 531-540页

作者： Khan, Muazzam A. Ahmad, Jawad Javaid, Qaisar Saqib, Nazar A. Natl Univ Sci & Technol Dept Comp Engn NUST Coll EME Islamabad Pakistan HITEC Univ Dept Elect Engn Taxila Pakistan Int Islamic Univ Dept CS & SE Islamabad Pakistan

Wireless Sensor Networks (WSN) is widely deployed in monitoring of some physical activity and/or environmental conditions. Data gathered from WSN is transmitted via network to a central location for further processing. Numerous applications of WSN can be found in smart homes, intelligent buildings, health care, energy efficient smart grids and industrial control systems. In recent years, computer scientists has focused towards findings more applications of WSN in multimedia technologies, i.e. audio, video and digital images. Due to bulky nature of multimedia data, WSN process a large volume of multimedia data which significantly increases computational complexity and hence reduces battery time. With respect to battery life constraints, image compression in addition with secure transmission over a wide ranged sensor network is an emerging and challenging task in Wireless Multimedia Sensor Networks. Due to the open nature of the Internet, transmission of data must be secure through a process known as encryption. As a result, there is an intensive demand for such schemes that is energy efficient as well as highly secure since decades. In this paper, discrete wavelet-based partial image encryption scheme using hashing algorithm, chaotic maps and Hussain's S-Box is reported. The plaintext image is compressed via discrete wavelet transform and then the image is shuffled column-wise and row wise-wise via Piece-wise Linear Chaotic Map (PWLCM) and Nonlinear Chaotic Algorithm, respectively. To get higher security, initial conditions for PWLCM are made dependent on hash function. The permuted image is bitwise XORed with random matrix generated from Intertwining Logistic map. To enhance the security further, final ciphertext is obtained after substituting all elements with Hussain's substitution box. Experimental and statistical results confirm the strength of the anticipated scheme.

关键词： WSN WMSN compression image encryption correlation analysis NPCR UACI

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Fractal image coding based on same sized block mapping

Fractal image coding based on same sized block mapping

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Conference on image compression and encryption technologies

作者： Zhao, Y Yuan, BZ No Jiaotong Univ Inst Informat Sci Beijing 100044 Peoples R China

ISBN: (纸本)0819442798

In traditional fractal image coding schemes, domain blocks are constrained to be twice as large as range blocks in order to ensure the convergence of the iterative decoding stage. However, this constraint has limited the fractal encoder to exploit the self-similarity of the original image. In order to overcome the shortcoming, a novel scheme using same sized range and domain blocks is proposed in the letter. Experimental results show the remarkable improvement in compression ratio and image quality.

关键词： fractal image coding image compression image coding

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Decorrelation of multispectral images for lossless compression

Decorrelation of multispectral images for lossless compressi...

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Conference on image compression and encryption technologies

作者： Zhang, R Liu, ZK Yu, NG Univ Sci & Technol China Hefei 230026 Peoples R China

ISBN: (纸本)0819442798

Decorrelation is the most important step in lossless compression. There are spatial and spectral redundancies in multispectral images. In this paper, we proposed a new technique that integer wavelet transform is used to remove spatial redundancy and non-linear predictors are used to remove spectral redundancy, For computational reason, the number of spectral predictors is discussed. These techniques result in higher compression ratios.

关键词： integer wavelet transform predictors lossless compression

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image compression-encryption Scheme Based on 2D DWT, SPIHT and Qi Hyper-chaos

Image Compression-Encryption Scheme Based on 2D DWT, SPIHT a...

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27th Southern African Universities Power Engineering Conference (SAUPEC) / 11th Robotics and Mechatronics Conference of South Africa (RobMech) / 29th Annual Symposium of Pattern-Recognition-Association-of-South-Africa (PRASA)

作者： Lisungu, Tresor Oteko Sumbwanyambe, Mbuyu Univ South Africa Dept Elect & Min Engn Johannesburg South Africa

ISBN: (纸本)9781728103693

With an ever increase usage of multi-media content, such audio, image and video across networks, image compression and security of content has become almost a need to users who would want to transmit over such networks. Transmitting over such networks, especially with images, may result in some information in an image being lost. For that reason good and efficient encryption methods are needed to store and transmit images while preserving the best imaginable quality features enhanced with security. This paper suggests or develops an efficient image compression-encryption scheme based on Discrete wavelet decomposition, SPIHT and Qi hyper-chaos. Pseudo-random numbers generated from Qi hyper chaos and which are in line with the Federal Information Processing Standards (FIPS) and National Institute of Standards and Technology (NIST) were used in this study. The random numbers were used to change the image characteristics and in essence to hide the visual information related to image. To achieve the selective compression-encryption, the 2-D wavelet transform was used to decompose the image into details and approximation components, Set Partitioning in Hierarchical Tree compression method was used to compress the decomposed LL2 image before being encrypted with the bits stream key generated from the Qi hyper-chaos using exclusive or operation. The experimental results demonstrate that the proposed scheme is good for data compression and encryption.

关键词： image compression selective image encryption Discrete Wavelet Transform (DWT) Qi hyper-chaos SPIHT Cryptography

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New image encryption and compression Method Based on Independent Component Analysis

New Image Encryption and Compression Method Based on Indepen...

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3rd International Conference on Information and Communication technologies

作者： Ito, Masanori Ohnishi, Noboru Alfalou, Ayman Mansour, Ali Nagoya Univ Grad Sch Informat Sci Chikusa Ku Furo Cho Nagoya Aichi 4648603 Japan

ISBN: (纸本)9781424417513

For telecommunication systems, various compression and encryption techniques are proposed to satisfy a fast and secure transmission. However these two techniques have been studied separately. In this paper we propose a method combining encryption and compression based on Independent Component Analysis (ICA) and Discrete Cosine Transform (DCT). For encryption, target images are covered with an insignificant image to hide them and their mixtures to be transmitted are obtained. The receiver reconstructs the original images applying some ICA algorithm to the mixed images. In compression process, using DCT and simple low pass filter, the size of transmission can be reduced. Throughout several computer simulations, the performance of the proposed method is confirmed.

关键词： Discrete cosine transforms

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SPIRT compression on encrypted images

SPIRT compression on encrypted images

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2013 IEEE Conference on Information and Communication technologies, ICT 2013

作者： Rengarajaswamy, C. Rosaline, S. Imaculate Department of Electronics and Communication Engineering Oxford Engineering College India

ISBN: (纸本)9781467357586

A novel technique is proposed for encryption and compression. Here an image is first encrypted using the stream cipher and then compressing the encrypted image using SPIHT. The panorama here stands for using the highly efficient encryption standard and unabating experience of compression techniques. The stream ciphers are chosen for their high encryption rate and they are mainly of bit-by-bit encryption. They don't simply mean encryption but provides authenticity and integrity. Then on the compression section we prefer SPIHT for their unique factors such as larger bit depth, progress from lossy to lossless compression, unrestricted dimensions in image, etc. This paper focuses mainly on highly secure encryption and high compression rate using SPIHT method in Larger images. © 2013 IEEE.

关键词： Cryptography

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