Reverse-engineering the Compression Algorithm of a Digital Camera PDF Download
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Author: Utku Yurday
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Book Description
Author: Utku Yurday
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Book Description
Author: Anthony T. S. Ho
Publisher: John Wiley & Sons
ISBN: 1118705785
Category : Technology & Engineering
Languages : en
Pages : 704
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Book Description
Digital forensics and multimedia forensics are rapidly growing disciplines whereby electronic information is extracted and interpreted for use in a court of law. These two fields are finding increasing importance in law enforcement and the investigation of cybercrime as the ubiquity of personal computing and the internet becomes ever-more apparent. Digital forensics involves investigating computer systems and digital artefacts in general, while multimedia forensics is a sub-topic of digital forensics focusing on evidence extracted from both normal computer systems and special multimedia devices, such as digital cameras. This book focuses on the interface between digital forensics and multimedia forensics, bringing two closely related fields of forensic expertise together to identify and understand the current state-of-the-art in digital forensic investigation. Both fields are expertly attended to by contributions from researchers and forensic practitioners specializing in diverse topics such as forensic authentication, forensic triage, forensic photogrammetry, biometric forensics, multimedia device identification, and image forgery detection among many others. Key features: Brings digital and multimedia forensics together with contributions from academia, law enforcement, and the digital forensics industry for extensive coverage of all the major aspects of digital forensics of multimedia data and devices Provides comprehensive and authoritative coverage of digital forensics of multimedia data and devices Offers not only explanations of techniques but also real-world and simulated case studies to illustrate how digital and multimedia forensics techniques work Includes a companion website hosting continually updated supplementary materials ranging from extended and updated coverage of standards to best practice guides, test datasets and more case studies
Author: Alan Saul Machet
Publisher:
ISBN:
Category : Reverse engineering
Languages : en
Pages : 234
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Book Description
Author: Rastislav Lukac
Publisher: CRC Press
ISBN: 1420054538
Category : Technology & Engineering
Languages : en
Pages : 600
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Book Description
A Decade of Extraordinary Growth The past decade has brought a surge of growth in the technologies for digital color imaging, multidimensional signal processing, and visual scene analysis. These advances have been crucial to developing new camera-driven applications and commercial products in digital photography. Single-Sensor Imaging: Methods and Applications for Digital Cameras embraces this extraordinary progress, comprehensively covering state-of-the-art systems, processing techniques, and emerging applications. Experts Address Challenges and Trends Single-Sensor Imaging: Methods and Applications for Digital Cameras presents leading experts elucidating their own accomplishments in developing the technologies reshaping this field. The editor invited renowned authorities to address specific research challenges and recent trends in their particular areas of expertise. The book discusses single-sensor digital color imaging fundamentals, including reusable embedded software platform, digital camera image processing chain, optical filter and color filter array designs. It also details the latest techniques and approaches in contemporary and traditional digital camera color image processing and analysis for various sophisticated applications, including: Demosaicking and color restoration White balancing and color transfer Color and exposure correction Image denoising and color enhancement Image compression and storage formats Red-eye detection and removal Image resizing Video-demosaicking and superresolution imaging Image and video stabilization A Solid Foundation of Knowledge to Solve Problems Single-Sensor Imaging: Methods and Applications for Digital Cameras builds a strong fundamental understanding of theory and methods for solving many of today’s most interesting and challenging problems in digital color image and video acquisition, analysis, processing, and storage. A broad survey of the existing solutions and relevant literature makes this book a valuable resource both for researchers and those applying rapidly evolving digital camera technologies.
Author: Raymond Westwater
Publisher: Springer
ISBN: 0585323135
Category : Technology & Engineering
Languages : en
Pages : 164
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Book Description
Real-Time Video Compression: Techniques and Algorithms introduces the XYZ video compression technique, which operates in three dimensions, eliminating the overhead of motion estimation. First, video compression standards, MPEG and H.261/H.263, are described. They both use asymmetric compression algorithms, based on motion estimation. Their encoders are much more complex than decoders. The XYZ technique uses a symmetric algorithm, based on the Three-Dimensional Discrete Cosine Transform (3D-DCT). 3D-DCT was originally suggested for compression about twenty years ago; however, at that time the computational complexity of the algorithm was too high, it required large buffer memory, and was not as effective as motion estimation. We have resurrected the 3D-DCT-based video compression algorithm by developing several enhancements to the original algorithm. These enhancements make the algorithm feasible for real-time video compression in applications such as video-on-demand, interactive multimedia, and videoconferencing. The demonstrated results, presented in this book, suggest that the XYZ video compression technique is not only a fast algorithm, but also provides superior compression ratios and high quality of the video compared to existing standard techniques, such as MPEG and H.261/H.263. The elegance of the XYZ technique is in its simplicity, which leads to inexpensive VLSI implementation of any XYZ codec. Real-Time Video Compression: Techniques and Algorithms can be used as a text for graduate students and researchers working in the area of real-time video compression. In addition, the book serves as an essential reference for professionals in the field.
Author: Andreas Pfitzmann
Publisher: Springer
ISBN: 3540465146
Category : Computers
Languages : en
Pages : 501
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Book Description
Although the animal may be, as Nietzsche argued, ahistorical, living completely in the present, it nonetheless plays a crucial role in human history. The fascination with animals that leads not only to a desire to observe and even live alongside them, but to capture or kill them, is found in all civilizations. The essays collected in Beastly Natures show how animals have been brought into human culture, literally helping to build our societies (as domesticated animals have done) or contributing, often in problematic ways, to our concept of the wild. The book begins with a group of essays that approach the historical relevance of human-animal relations seen from the perspectives of various disciplines and suggest ways in which animals might be brought into formal studies of history. Differences in species and location can greatly affect the shape of human-animal interaction, and so the essays that follow address a wide spectrum of topics, including the demanding fate of the working horse, the complex image of the American alligator (at turns a dangerous predator and a tourist attraction), the zoo gardens of Victorian England, the iconography of the rhinoceros and the preference it reveals in society for myth over science, relations between humans and wolves in Europe, and what we can learn from society’s enthusiasm for "political" animals, such as the pets of the American presidents and the Soviet Union’s "space dogs." Taken together, these essays suggest new ways of looking not only at animals but at human history. Contributors Mark V. Barrow Jr., Virginia Tech * Peter Edwards, Roehampton University * Kelly Enright, Rutgers University * Oliver Hochadel, Universitat Autònoma de Barcelona * Uwe Lübken, Rachel Carson Center, Munich * Garry Marvin, Roehampton University * Clay McShane, Northeastern University * Amy Nelson, Virginia Tech * Susan Pearson, Northwestern University * Helena Pycior, University of Wisconsin–Milwaukee * Harriet Ritvo, Massachusetts Institute of Technology * Nigel Rothfels, University of Wisconsin–Milwaukee * Joel A. Tarr, Carnegie Mellon University * Mary Weismantel, Northwestern University
Author: Bogomir Doringer
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110527707
Category : Art
Languages : en
Pages : 304
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Book Description
The contributions to this book explore a phenomenon that appears to be a contradiction in itself – we, the users of computers, can be tracked in digital space for all eternity. Although, on the one hand, one wants to be noticed and noticeable, on the other hand one does not necessarily want to be recognized at the first instance, being prey to an unfathomable public, or – even less so – to lose face. The book documents artistic and other strategies that point out options for appearing in the infinite book of faces whilst nevertheless avoiding being included in any records. The desire not to become a mere object of facial sell-out does not just remain an aesthetic endeavor. The contributions also contain combative and sarcastic statements against a digital dynamic that has already penetrated our everyday lives.
Author: Matthew Sorell
Publisher: Springer Science & Business Media
ISBN: 3642023126
Category : Law
Languages : en
Pages : 232
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Book Description
The Second International Conference on Forensic Applications and Techniques in Telecommunications, Information and Multimedia (e-Forensics 2009) took place in Adelaide, South Australia during January 19-21, 2009, at the Australian National Wine Centre, University of Adelaide. In addition to the peer-reviewed academic papers presented in this volume, the c- ference featured a significant number of plenary contributions from recognized - tional and international leaders in digital forensic investigation. Keynote speaker Andy Jones, head of security research at British Telecom, outlined the emerging challenges of investigation as new devices enter the market. These - clude the impact of solid-state memory, ultra-portable devices, and distributed storage – also known as cloud computing. The plenary session on Digital Forensics Practice included Troy O’Malley, Que- sland Police Service, who outlined the paperless case file system now in use in Que- sland, noting that efficiency and efficacy gains in using the system have now meant that police can arrive at a suspect’s home before the suspect! Joseph Razik, represe- ing Patrick Perrot of the Institut de Recherche Criminelle de la Gendarmerie Nati- ale, France, summarized research activities in speech, image, video and multimedia at the IRCGN. The plenary session on The Interaction Between Technology and Law brought a legal perspective to the technological challenges of digital forensic investigation.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Digital camera is the main medium for digital photography. The basic operation performed by a simple digital camera is, to convert the light energy to electrical energy, then the energy is converted to digital format and a compression algorithm is used to reduce memory requirement for storing the image. This compression algorithm is frequently called for capturing and storing the images. This leads us to develop an efficient compression algorithm which will give the same result as that of the existing algorithms with low power consumption. As a result the new algorithm implemented camera can be used for capturing more images then the previous one. 1) Discrete Cosine Transform (DCT) based JPEG is an accepted standard for lossy compression of still image. Quantisation is mainly responsible for the amount loss in the image quality in the process of lossy compression. A new Energy Quantisation (EQ) method proposed for speeding up the coding and decoding procedure while preserving image qu ...
Author: Madhuri A Joshi
Publisher: CRC Press
ISBN: 9780367378165
Category :
Languages : en
Pages : 236
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Book Description
"Preface This book is intended primarily for courses in image compression techniques for undergraduate through postgraduate students, research scholars, and engineers working in the field. It presents the basic concepts and technologies in a student-friendly manner. The major techniques in image compression are explained with informative illustrations, and the concepts are evolved from the basics. Practical implementation is demonstrated with MATLAB
