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On the Classification of Digital images Processed by the DAC Algorithm

On the Classification of Digital Images Processed by the DAC...

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International conference on Modern Problems of Radio Engineering, Telecommunications and Computer Science

作者： Viktor Makarichev Vladimir Lukin Iryna Brysina Dept. of Information-Communication Technologies National Aerospace University “KhAI” Kharkiv Ukraine Dept. of Higher Mathematics and System Analysis National Aerospace University “KhAI” Kharkiv Ukraine

ISBN: (数字)9798331520564

ISBN: (纸本)9798331520571

image classification is an essential part of computer vision. A lot of approaches, in particular, based on applying convolutional neural networks have been proposed. In this paper, we investigate the impact of discrete atomic compression (DAC) on state-of-the-art models. The DAC algorithm ensures low resource intensive image encryption and compression features. Such a combination makes its usage promising, especially taking into account a huge number of digital images and current data protection requirements. DAC has lossy and lossless compression modes. The first one provides a higher compression ratio in combination with distortions. The aim of this research is to answer the following question: how does quality loss, which is introduced by DAC, affect the efficiency of the MobileNetV2, VGG16, VGG19, ResNet50, NASNetMobile and NASNetLarge models? It is shown that the difference between classifying images before and after lossy DAC-compression is insignificant.

关键词： Visualization image coding Computational modeling Digital images Distortion Market research Classification algorithms Telecommunications Convolutional neural networks Residual neural networks

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GEZGİN-2: image processing subsystem of RASAT

GEZGİN-2: Image processing subsystem of RASAT

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International conference on Recent Advances in Space technologies (RAST)

作者： N. İsmailoğlu B. Vargün R. Sever B. Okcan K. Karakuş K. Kapucu R. Öktem TÜBİTAK-UZAY Middle East Technical University Ankara Turkey Buladur Bilişim Elektronik Ankara Turkey

GEZGİN-2 is the image processing subsystem of RASAT, an earth-observing small satellite which has been developed, built and qualified by TÜBİTAK-UZAY for a LEO mission. GEZGİN-2 is responsible for real-time compression of multi-spectral images acquired by the push-broom imagers of RASAT, before being transferred to the Solid State Data Recorders on-board the satellite. By applying compression to image data prior to recording, on-board storage space and downlink communication bandwidth of RASAT is more efficiently utilized. GEZGİN-2 realizes its image processing tasks through a fully integrated application specific digital architecture, delivering a processing rate of 55Mbps and consuming 6 Watts. As all subsystems of RASAT, GEZGİN-2 has been implemented with commercial-off-the-shelf (COTS) components but qualified for its LEO mission through thermal vacuum cycling and vibrations tests compliant to ESA specifications. GEZGİN-2 has been successfully integrated on RASAT in year 2010 and is ready for launch.

关键词： image coding Transform coding Field programmable gate arrays Streaming media encryption Computer architecture Application specific integrated circuits

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An enhancement in security and copyright protection technique used for digital still image

An enhancement in security and copyright protection techniqu...

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International conference on Nascent technologies in the Engineering Field (ICNTE)

作者： Sudhanshu Suhas Gonge Ashok A. Ghatol Department of C.S.E Faculty of Engineering & Technology SGBAU Amravati Maharashtra India Dr. Babasaheb Ambedkar Technological University Lonere Maharashtra India

ISBN: (纸本)9781509027958

Digital communication facilitates us to transmission of data from transmission station to receiver station. Digital data required different multimedia techniques for transferring and maintaining the quality of digital data. As we know that, digital data are in various formats like text, audio, video, image, graphics, and message or in animated format. During transmission of digital data through channel, digital data requires of security as well as copyright protection. In this paper, 2-D digital still image is used for experimental purpose. There are variety of techniques and algorithms which can provide security and copyright protection services. The combination of DWT and DCT digital watermarking technique is used to provide copyright protection service and security services can be provided by AES technique using 256 bits key. The Combination of digital image watermarking and AES technique provides authenticity, copyright protection, and security to digital image against different attacks like Cropping, Gaussian noise, Salt and pepper noise, JPEG compression, Median filtering and Rotation attack.

关键词： Watermarking Discrete wavelet transforms Discrete cosine transforms encryption Robustness Copyright protection

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encryption Based Medical image Watermarking against Signal Processing Attacks

Encryption Based Medical Image Watermarking against Signal P...

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2015 International conference on Future Computational technologies (ICFCT’2015);International conference on Advances in Chemical, Biological & Environmental Engineering (ACBEE);International conference on Urban Planning, Transport and Construction Engineering (ICUPTCE’15)

作者： Abhilasha Sharma Mayank Dave Amit Kumar Singh S P Ghrera Department of Computer Science & Engineering Jaypee University of Information Technology Department of Computer Engineering NIT Kurukshetra

The protection of data is of at most importance in the medical field to boost the telemedicine *** is a need of robust and secure mechanism to transfer the medical images over the *** algorithm proposed in this study is the watermarking technique in the transform domain to ensure secure transfer of medical *** DWT transformation and substitution method,we embed the watermark into the cover image and the watermarked image is then encrypted by using the symmetric stream cipher *** of the proposed algorithm is analyzed against various signal processing attacks like compression,filtering,noise and histogram equalization and desired outcome is obtained without much degradation in extracted watermark and watermarked image quality.

关键词： Watermarking DWT Robustness Medical images Imperceptibility

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Secure and Robust Watermarking Scheme based on Motion Features for Video Object

Secure and Robust Watermarking Scheme based on Motion Featur...

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International conference on Reliability, Infocom technologies and Optimization (ICRITO) (Trends and Future Directions)

作者： Rakesh Ahuja Purnima Mohd Junedul Haque Sarvesh Tanwar Nidhi Gautam Ajay Rana Chitkara University Institute of Engineering and Technology Chitkara University Punjab India Amity Institution of Information Technology Amity university Noida Uttar Pradesh University Institute of Applied Management Sciences Panjab University Chandigarh AIIT Amity University Uttar Pradesh Noida India

ISBN: (数字)9781728170169

ISBN: (纸本)9781728170176

The rapid development of worthy internet bandwidth transfers the digital multimedia objects to remote computer system instantaneously. The advent of digital technologies makes possible to create multiple identical copies of the original video. These two revolutionary changes in technologies exploited by malicious user also to make false claim for ownership protection, copyright protection, copy control and many more issues. The proposed technique suggested an innovative method by embedding the different segments of scrambled watermark in the extracted motion features of the video. The encryption key used to encrypt the watermark is depend upon the features of video and it always different for each different video. The scheme is robust and imperceptible enough to secure the watermark embedded into the video object. The outcome reveals that the scheme is robust to intentional and unintentional image and video specific attacks considered to occur frequently in nature. The superiority of the algorithm is that it found better robustness against compression attack.

关键词： Watermarking Streaming media Robustness Feature extraction encryption Motion pictures

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An Efficient and Privacy-Preserving Medical image compression and Sharing Protocol

An Efficient and Privacy-Preserving Medical Image Compressio...

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International conference on Computing and Networking Technology (ICCNT)

作者： Surendra Singh Shubham Tripathi Tanya Jain Saurabh Rana Neelam Choudhary School of Computer Science Engineering & Technology Bennett University Gautam Buddha Nagar India

ISBN: (数字)9798350370249

ISBN: (纸本)9798350370270

The effective transmission and sampling of clinical images are important research areas in computer science, particularly in the healthcare industry. Methods such as personal area networking and body area networking are valuable for medical monitoring systems used in remote surgical guidance and early emergency detection. However, due to the sensitive nature of medical images, strong privacy protection and secure data aggregation/compression techniques are needed. In this study, we use compressive sensing theory to address these challenges with a novel approach. Our technique reduces the size of medical photos by $10 \%$, while maintaining strong secrecy through the use of additive homomorphic encryption.

关键词： Industries Privacy Protocols Surgery Medical services Sensors Protection Medical diagnostic imaging Compressed sensing Monitoring

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Sub-band exchange DWT based image fusion algorithm for enhanced security

Sub-band exchange DWT based image fusion algorithm for enhan...

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International conference on Advances in Computing, Communications and Informatics (ICACCI)

作者： Jaypal Baviskar Afshan Mulla Neha Kudu Aditi Parthsarathy Amol Baviskar Research Scientist Intelligent Communication Lab Mumbai India Department of Electronics Engineering Dwarkadas J. Sanghvi College of Engineering Mumbai India Department of Electronics Engineering Universal College of Engineering Vasai India

Transmission of critical data over the link, in the presence of an attacker has augmented the demand for secure communication. Particularly in the military field, exchange of classified images has to be executed with extreme caution. Advanced digital technologies require encryption, authentication and key distribution techniques to facilitate reliable and secure communication. In this paper, Discrete Wavelet Transform (DWT) Sub-band Exchange based color image fusion scheme for enhanced security is proposed. In this method, the horizontal and vertical sub-bands of two colored images are replaced by chrominance information of each other. This permits generation of uniquely fused gray-scale textured images. This method facilitates fused images which are extremely difficult to intercept by the attacker, since the probability of getting hold on all the information pertaining to one single image is negligible. Also, this method offers reduced bandwidth utilization and less transmission time as it converts colored images to compressed textured gray-scale images. In addition to proposing a novel image fusion technique and compression scheme, this paper illustrates detailed analysis of the algorithm.

关键词： Discrete wavelet transforms Security Gray-scale image coding image color analysis image reconstruction

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Enhanced Reversible Data Hiding Scheme Based on DCT Coefficients in JPEG compression

Enhanced Reversible Data Hiding Scheme Based on DCT Coeffici...

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International conference on Circuit, Power and Computing technologies (ICCPCT)

作者： S. Sudhakar T. R. Dinesh Kumar S. Sivasaravana Babu M. Chandravel A. Joshua Paul I. Karthick Selvam Department of Electronics and Communication Engineering Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College Chennai India

ISBN: (数字)9798350372816

ISBN: (纸本)9798350372823

Data hiding approaches in Joint Photographic Experts Group (JPEG) compression that use discrete cosine transform (DCT) coefficients are gaining popularity due to their capacity to integrate more data into JPEG pictures while producing perceptible aesthetic deterioration. Reversible data concealing is critical for safe data transport and secrecy. This study presents a novel reversible information concealing strategy based on DCT coefficients in the overall setting of compressed JPEG data. The procedure starts with the intake of hosting pictures and the image meant for hiding. Using DCT's time domain evaluation, the host picture is examined to discover suitable spots for integrating binary data. A binary threshold is used to choose appropriate brightness ranges for DCT coefficients for smooth and undetectable data implantation. To improve the embedding process, a binary scale operation is performed on the picture intended for data concealment. This scaling not only maximizes the use of available embedding space but also reduces potential visual distortion, resulting in an overall enhancement in the scheme's resilience and profitability. In addition, equalizing the histogram is used to equalize the pixel intensities of the background and concealed pictures, increasing consistency and improving the overall optical level of the assembled image. Chaotic encryption is used throughout the procedure to certify the protection of the embedded informations. The contained binary data may be precisely recovered from the changed DCT values, enabling a complete recuperation of the original host picture as well as the hidden information. The findings show that the approach can accomplish bidirectional data hiding inside JPEG compression, with encrypted pictures visualizing the effective incorporation of hidden data. This project is powered by MATLAB software.

关键词： Visualization Profitability Transform coding Optical distortion Distortion Software Discrete cosine transforms

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A High Performance EO Small Satellite Platform (SSTL-300)

A High Performance EO Small Satellite Platform (SSTL-300)

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International conference on Recent Advances in Space technologies (RAST)

作者： Mike Cutter Philip Davies Adam Baker Martin Sweeting Surrey Satellite Technology Limited Guildford Surrey UK

This paper describes a new high performance Earth Observation Platform, the SSTL-300, which has been developed to provide customers with a capability that has previously only been available at much higher cost and on larger platforms. This platform offers a 7-year mission lifetime with a very high operational availability. The main payload is a very high-resolution imager (VHRI) with a panchromatic 2.5 m ground sampling distance (GSD) channel and four multi-spectral channels offering 5 m GSD. The imager swath is 20 km in all channels. This imager is an extension of the 4 m GSD imager already flying on Beijing-1, which was launched in October 2005. Additional payloads can be accommodated, such as the Medium Resolution imager (MRI), offering lower resolution of 22 m or 32 m GSD in four multiple spectral bands with 300 km swath width. The 32 m MRI has already flown on four previous Disaster Monitoring Constellation (DMC) Missions. High performance geo-location is provided, the performance of which is dependent on the chosen subsystem options. Simultaneous imaging is possible with the VHRI and the MRI and scenes can be as long as 2000 km. The image data is compressed on-board, using lossless data compression, for store-and-forward operations. Furthermore, switchable encryption is available, using the Data encryption Standard (DES), on the TM/TC as well as switchable scrambling on payload data. Near real-time imaging & down-linking is possible for a range of targets close to the ground station. A range of imaging modes are available including: strip mapping, fast response scene capture, stereo imaging, with pitch angles between 10 and 45deg to provide digital elevation models, and increased area coverage to provide wide-swath high-resolution imagery of up to 85 km. The nominal orbit for the SSTL-300 will be sun-synchronous, with a 10.30 am node to provide repeatable global coverage and good lighting conditions. The platform will orbit at approximately 700 km, which provi

关键词： Satellites High-resolution imaging Payloads Magnetic resonance imaging image resolution Layout Cryptography Earth Costs Availability

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A Robust, Non-blind High Capacity & Secure Digital Watermarking Scheme for image Secret Information, Authentication and Tampering Localization and Recovery via the Discrete Wavelet Transform

A Robust, Non-blind High Capacity & Secure Digital Watermark...

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IEEE conference on technologies for Homeland Security

作者： S. S. Chaughule D. B. Megherbi CMINDS research center University of Massachusetts Lowell U.S.A

ISBN: (数字)9781728150925

ISBN: (纸本)9781728150932

In today's world accessibility and trade of advance digital information over the web is of key significance. Security and verification of digital information, including digital images, is one of the greatest concerns. For this specific reason, in this paper we propose a non-blind watermarking technique for self-recovery and authentication of hidden images against unauthorized tampering by utilizing the Discrete Wavelet Transform (DWT) and the Arnold's Transform. Due to the nature of the Discrete Wavelet Transform, DWT-based watermarking schemes, in general, have the hidden images size limited to up to 1/4 of the carrier image size; that is, for example, for a 256×56-carrier image the size of the hidden images is usually up to 128×128. In this paper, we show how the proposed DWT-based technique (a) has a moderately high capacity capability as it allows hidden images of the same size as that of the carrier image, (b) uses a self-recovery framework for watermarking and information hiding that allows embedding twice the number of correction matrices as in prior related work. This makes the proposed non-blind technique equipped with about twice as much capability of self-recovery from unauthorized tampering as in prior work, (c) allows unauthorized tampering localization and recovery against unauthorized tampering such as image cropping, blurring, pixel tampering, (d) utilizes all three-color channels of a carrier image for watermarking and information hiding, and (e) adds security in the secret hidden image information. Experimental results are presented to show the potential value of the proposed non-blind method for multiple information hiding of same size and the carrier image, tampering detection/localization, authentication, and tampering self-recovery, including cropping, and robustness of the proposed scheme to JPEG compression and encryption, and other unauthorized tampering.

关键词： Watermarking Discrete wavelet transforms Robustness Authentication image coding image color analysis

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