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DubaiSat-2 image handling 14th

DubaiSat-2 image handling

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14th International conference on Space Operations, SpaceOps 2016

作者： Zowayed, Khalid Al Harmi, Mohammed Dubai United Arab Emirates

ISBN: (纸本)9781624104268

DubaiSat-2 is the United Arab Emirates (UAE) second earth observation satellite. It was launched into a 600 km orbit on the 21st of November 2013. The satellite is owned and operated by the Mohammed Bin Rashid Space Centre (MBRSC) to provide electro-optical images, that can be commercialized, for users within the United Arab Emirates and beyond and to develop and implement new technologies not used in ***-2 is designed for a sun-synchronous orbit of 600km, with a spatial resolution of 1m PAN and 4m Multispectral (MS), and a Swath of 12.2 km. This paper highlights the use of DubaiSat-2 imagery order handling. The satellites images are processed at Mohammed bin Rashid Space Centre headquarters in Dubai to functional specifications demanded by commercial and government clients to meet a range of urban planning, environmental monitoring and geographical measuring criteria. the key feature in advanced imaging in Dubai Sat -2 is the High resolution Advanced Imaging System (HIRAIS) which implements advanced image acquisition, increased image storage capacity, improved X-band data transmission speed and image data encryption and compression. In addition, this paper will compare image handling used in DubaiSat-1 with the one used in DubaiSat-2. Lesson learned and experience from DS-1 imaging experience will be highlighted and will indicate how it got improved in the new system of HIRAIS imaging in DS-2. © 2016 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： image enhancement

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Hardware implementation of novel image compression-encryption system on a FPGA

Hardware implementation of novel image compression-encryptio...

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International conference on Electrical and Electronics Engineering, ELECO

作者： Ahmet Çağrı Bağbaba Berna Örs Istanbul Technical University Turkey

With the development of digital technologies, compression and encryption have become important aspects of information. In many applications, encryption of compressed images is considered vital for hiding data. In this work, we implemented the image compression-encryption hardware on a FPGA. JPEG was used as a compression standard and Tiny encryption Algorithm was used as an encryption algorithm. Discrete Cosine Transform coefficients were encrypted by using two methods. First, only DC coefficients of each 8×8 block of image were encrypted. Then, along with DC coefficients, first five AC coefficients of each 8×8 block of image were encrypted. In the result, encrypted images and PSNR values were given in order to determine success of the work. This work is novel from the point of view encryption methods.

关键词： encryption Discrete cosine transforms image coding Transform coding Hardware Quantization (signal)

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An optimized architecture to perform image compression and encryption simultaneously using modified DCT algorithm

An optimized architecture to perform image compression and e...

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International conference on Signal Processing, Communication, Computing and Networking technologies

作者： S V V Sateesh R Sakthivel K Nirosha Harish M Kittur VIT University Vellore TN INDIA

Traditional fast Discrete Cosine Transforms (DCT)/ Inverse DCT (IDCT) algorithms have focused on reducing the arithmetic complexity. In this manuscript, we implemented a new architecture simultaneous for image compression and encryption technique suitable for real-time applications. Here, contrary to traditional compression algorithms, only special points of DCT outputs are calculated. For the encryption process, LFSR is used to generate random number and added to some DCT outputs. Both DCT algorithm and arithmetic operators used in algorithm are optimized in order to realize a compression with reduced operator requirements and to have a faster throughput. High Performance Multiplier (HPM) is being used for integer multiplications. Simulation results show the compression ratio around 66% and a PSNR about 24dB. The throughput of this architecture is 624 M samples/s with a clock frequency of 78 MHz.

关键词： image coding Computer architecture Discrete cosine transforms Clocks encryption Multiplexing

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1st International conference on Advances in Electrical and Computer technologies, ICAECT 2019

1st International Conference on Advances in Electrical and C...

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1st International conference on Advances in Electrical and Computer technologies, ICAECT 2019

ISBN: (纸本)9789811555572

The proceedings contain 119 papers. The special focus in this conference is on Advances in Electrical and Computer technologies. The topics include: Sum modified laplacian-based image fusion in dct domain with super resolution;a supplement to "pre: A simple, pragmatic, and provably correct algorithm";effective compression of digital images using spiht coding with selective decomposition bands;reconfigurable lut-based dynamic obfuscation for hardware security;detection and control of phishing attack in electronic medical record application;smart apron using embroidered textile fractal antenna for e-health monitoring system;design of modified wideband log periodic microstrip antenna with slot for navigational application;machine learning approach to condition monitoring of an automotive radiator cooling fan system;sensors network for temperature measurement in a cocoa fermentator;communication-aware virtual machine placement in cloud;migration from silicon to gallium nitride devices—a review;high-speed modified da architecture for dwt computation in secure image encoding;satellite image classification with data augmentation and convolutional neural network;design and randomness evaluation of a chaotic neural encryption and decryption network for trng;circuit modelling of graphene and carbon nanotube-based multilayer structures for high-frequency absorption;pi and sliding mode control of quanser qnet 2.0 hvac system;robust control of position and speed for a dc servomotor system using various control techniques;mpc-based temperature control of cstr process and its comparison with pid;microgrid integration in kerala power grid—a case study;design of control system for autonomous harvester based on navigation inputs;design and optimization of microgrid as ev charging source;preface.

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Crypto-compression of images based on chaos

Crypto-compression of images based on chaos

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International conference on Sciences of Electronics, technologies of Information and Telecommunications (SETIT)

作者： Jalel Hajji Mohamed Amine Ben Farah Mounir Samet Abdennaceur Kachouri Laboratory of Electronics and Information Technology National Engineering School of Sfax Sfax University Sfax Tunisia Higher Institute of Industrial System Gabes University Gabes Tunisia

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 cryptocompression 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： encryption image coding Algorithm design and analysis Histograms Correlation Logistics

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encryption and Decryption of image for Secured Data Transmission

Encryption and Decryption of Image for Secured Data Transmis...

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International conference on Futuristic Communication and Network technologies, CFCNT 2020

作者： Thirumarai Selvi, C. Sankarasubramanian, R.S. MuthuKrishnan, M. Sri Krishna College of Engineering and Techology Coimbatore Tamil Nadu India PSG Institute of Technology and Applied Research Coimbatore Tamil Nadu India KIT-Kalaigarkarunanidhi Institute of Engineering and Technology Coimbatore Tamil Nadu India

ISBN: (纸本)9789811646249

This work combines Arnold transform method with the spatial domain to encrypt a covered image and also recovers the covered image by the application of inverse Arnold transform. First, transform a cover image into subparts which consists of eight binary images by decimal value to eight-digit binary operation. Then, transform eight binary images into sub-blocks of eight binary scrambled images by the Arnold transform, respectively. Further, recombine the sequence of the eight binary scrambled matrices into a scrambled matrix with 256 Gy levels according to the specific club. Discrete wavelet transform (DWT) is used to perform image compression on the input image and secretly hidden image which is done using alpha blending. Finally, derive an encrypted image from the scrambled image by the Hartley transform. Second, decode the encrypted image using inverse Arnold Transform. Inverse DWT is performed to regain the compressed images. Simulations indicate that the hybrid new technique has more security, more robustness counter to occlusion and attacks about with high degree of image scrambling. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Discrete wavelet transforms

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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, vol.3

作者： Masanori Ito Noboru Ohnishi Ayman Alfalou Ali Mansour Graduate School of Information Science University of Nagoya Nagoya Japan ISEN-Brest Brest France ENSIETA-Ecole Nationale Superieure des Ingenieurs des Etudes et Techniques d''Armement Brest France

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： Cryptography image coding Independent component analysis Discrete cosine transforms Source separation Encoding image reconstruction Computer simulation Optical transmitters Blind source separation

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Secret image Sharing with Embedded Session Key

Secret Image Sharing with Embedded Session Key

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10th International conference on Computer Information Systems and Industrial Management Applications (CISIM 2011)

作者： Naskar, Prabir Kumar Khan, Hari Narayan Roy, Ujjal Chaudhuri, Ayan Chaudhuri, Atal Jadavpur Univ Dept Comp Sci & Engn Kolkata 700032 W Bengal India

ISBN: (纸本)9783642272448

In today's scenario many secret image files are needed to be transmitted over Internet for various important purposes. So protection of these files is an important issue. Efficient cryptographic methods are there to protect data but every thing depends on the protection of encryption key. Various secret sharing schemes are available in the literature but computational complexity is very high in most of the cases that leads to single point failure. To overcome this drawback shared cryptography becomes more popular. Here we are suggesting a novel secret sharing scheme which employs simple graphical masking method, performed by simple ANDing for share generation and reconstruction can be done by performing simple ORing the qualified set of legitimate shares. Here sharing and reconstruction are so simple, then our scheme may be applied in many hand held system with very low end processors. Not only that, the generated shares are compressed and each share contains partial secret information. Again decompression is possible only when qualified set of legitimate shares are available, that leads to added protection to the secret and reduced bandwidth requirement for transmission.

关键词： Threshold Cryptography image sharing compression Perfect Secret Sharing (PSS)

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An adaptive JPEG compression-encryption system using optimized local quantization matrices

An adaptive JPEG compression-encryption system using optimiz...

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International conference on Electrical and Computing technologies and Applications (ICECTA)

作者： Rimah Y. Bani Youniss Moh'd Belal Al-Zoubi Arafat Awajan Computer Engineering Department PSUT Amman JO Computer Graphics Department PSUT Amman Jordan Computer Science Department PSUT Amman Jordan

ISBN: (纸本)9781538608739

The JPEG compression techniques are known as a standardlossy compression techniques for images. In this paper, an adaptive approach is proposed where some changes in the quantization stage are made. The proposed approach mainly changes on the quantization matrix, according to the context of each image. Moreover, the adaptive approach has been developed to work as an encryption system that enables users to restore the original images after decompressing them. Compared to the standard JPEG quantization matrix, the proposed approach introduces an efficient compression system that decreases error rate in several tested scenarios, And efficient encryption system has been obtained as well.

关键词： image coding Transform coding encryption Standards Adaptive systems Quantization (signal) Discrete cosine transforms

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Privacy-preserving image Retrieval Scheme Allowing Mixed Use of Lossless and JPEG Compressed images

Privacy-preserving Image Retrieval Scheme Allowing Mixed Use...

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IEEE Global conference on Life Sciences and technologies (LifeTech)

作者： Kenta Iida Hitoshi Kiya Tokyo Metropolitan University Tokyo Japan

ISBN: (数字)9781665418751

ISBN: (纸本)9781665448086

We propose a novel content based-image retrieval scheme for encryption-then-compression (EtC) images. In conventional retrieval schemes for EtC images, the JPEG standard was applied to EtC images as a compression method, although EtC images can be applied to both JPEG compression and lossless compression methods such as JPEG-LS. In contrast, the proposed retrieval scheme allows the mixed-use of lossless and lossy-compression methods. In an experiment, the proposed method is demonstrated to maintain a high retrieval performance, even under the mixed-use of lossless- and lossy-compressed EtC images.

关键词： Degradation image coding image retrieval Transform coding Life sciences encryption Standards

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