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Author: Hany Farid
Publisher: MIT Press
ISBN: 0262537001
Category : Computers
Languages : en
Pages : 337
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Book Description
The first comprehensive and detailed presentation of techniques for authenticating digital images. Photographs have been doctored since photography was invented. Dictators have erased people from photographs and from history. Politicians have manipulated photos for short-term political gain. Altering photographs in the predigital era required time-consuming darkroom work. Today, powerful and low-cost digital technology makes it relatively easy to alter digital images, and the resulting fakes are difficult to detect. The field of photo forensics—pioneered in Hany Farid's lab at Dartmouth College—restores some trust to photography. In this book, Farid describes techniques that can be used to authenticate photos. He provides the intuition and background as well as the mathematical and algorithmic details needed to understand, implement, and utilize a variety of photo forensic techniques. Farid traces the entire imaging pipeline. He begins with the physics and geometry of the interaction of light with the physical world, proceeds through the way light passes through a camera lens, the conversion of light to pixel values in the electronic sensor, the packaging of the pixel values into a digital image file, and the pixel-level artifacts introduced by photo-editing software. Modeling the path of light during image creation reveals physical, geometric, and statistical regularities that are disrupted during the creation of a fake. Various forensic techniques exploit these irregularities to detect traces of tampering. A chapter of case studies examines the authenticity of viral video and famously questionable photographs including “Golden Eagle Snatches Kid” and the Lee Harvey Oswald backyard photo.
Author: Hany Farid
Publisher: MIT Press
ISBN: 0262537001
Category : Computers
Languages : en
Pages : 337
Get Book Here
Book Description
The first comprehensive and detailed presentation of techniques for authenticating digital images. Photographs have been doctored since photography was invented. Dictators have erased people from photographs and from history. Politicians have manipulated photos for short-term political gain. Altering photographs in the predigital era required time-consuming darkroom work. Today, powerful and low-cost digital technology makes it relatively easy to alter digital images, and the resulting fakes are difficult to detect. The field of photo forensics—pioneered in Hany Farid's lab at Dartmouth College—restores some trust to photography. In this book, Farid describes techniques that can be used to authenticate photos. He provides the intuition and background as well as the mathematical and algorithmic details needed to understand, implement, and utilize a variety of photo forensic techniques. Farid traces the entire imaging pipeline. He begins with the physics and geometry of the interaction of light with the physical world, proceeds through the way light passes through a camera lens, the conversion of light to pixel values in the electronic sensor, the packaging of the pixel values into a digital image file, and the pixel-level artifacts introduced by photo-editing software. Modeling the path of light during image creation reveals physical, geometric, and statistical regularities that are disrupted during the creation of a fake. Various forensic techniques exploit these irregularities to detect traces of tampering. A chapter of case studies examines the authenticity of viral video and famously questionable photographs including “Golden Eagle Snatches Kid” and the Lee Harvey Oswald backyard photo.
Author: Hany Farid
Publisher: MIT Press
ISBN: 0262035340
Category : Computers
Languages : en
Pages : 337
Get Book Here
Book Description
The first comprehensive and detailed presentation of techniques for authenticating digital images. Photographs have been doctored since photography was invented. Dictators have erased people from photographs and from history. Politicians have manipulated photos for short-term political gain. Altering photographs in the predigital era required time-consuming darkroom work. Today, powerful and low-cost digital technology makes it relatively easy to alter digital images, and the resulting fakes are difficult to detect. The field of photo forensics—pioneered in Hany Farid's lab at Dartmouth College—restores some trust to photography. In this book, Farid describes techniques that can be used to authenticate photos. He provides the intuition and background as well as the mathematical and algorithmic details needed to understand, implement, and utilize a variety of photo forensic techniques. Farid traces the entire imaging pipeline. He begins with the physics and geometry of the interaction of light with the physical world, proceeds through the way light passes through a camera lens, the conversion of light to pixel values in the electronic sensor, the packaging of the pixel values into a digital image file, and the pixel-level artifacts introduced by photo-editing software. Modeling the path of light during image creation reveals physical, geometric, and statistical regularities that are disrupted during the creation of a fake. Various forensic techniques exploit these irregularities to detect traces of tampering. A chapter of case studies examines the authenticity of viral video and famously questionable photographs including “Golden Eagle Snatches Kid” and the Lee Harvey Oswald backyard photo.
Author: Husrev Taha Sencar
Publisher: Springer Science & Business Media
ISBN: 1461407575
Category : Technology & Engineering
Languages : en
Pages : 369
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Book Description
Photographic imagery has come a long way from the pinhole cameras of the nineteenth century. Digital imagery, and its applications, develops in tandem with contemporary society’s sophisticated literacy of this subtle medium. This book examines the ways in which digital images have become ever more ubiquitous as legal and medical evidence, just as they have become our primary source of news and have replaced paper-based financial documentation. Crucially, the contributions also analyze the very profound problems which have arisen alongside the digital image, issues of veracity and progeny that demand systematic and detailed response: It looks real, but is it? What camera captured it? Has it been doctored or subtly altered? Attempting to provide answers to these slippery issues, the book covers how digital images are created, processed and stored before moving on to set out the latest techniques for forensically examining images, and finally addressing practical issues such as courtroom admissibility. In an environment where even novice users can alter digital media, this authoritative publication will do much so stabilize public trust in these real, yet vastly flexible, images of the world around us.
Author: Aniket Roy
Publisher: Springer
ISBN: 9811076448
Category : Technology & Engineering
Languages : en
Pages : 89
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Book Description
This book discusses blind investigation and recovery of digital evidence left behind on digital devices, primarily for the purpose of tracing cybercrime sources and criminals. It presents an overview of the challenges of digital image forensics, with a specific focus on two of the most common forensic problems. The first part of the book addresses image source investigation, which involves mapping an image back to its camera source to facilitate investigating and tracing the source of a crime. The second part of the book focuses on image-forgery detection, primarily focusing on “copy-move forgery” in digital images, and presenting effective solutions to copy-move forgery detection with an emphasis on additional related challenges such as blur-invariance, similar genuine object identification, etc. The book concludes with future research directions, including counter forensics. With the necessary mathematical information in every chapter, the book serves as a useful reference resource for researchers and professionals alike. In addition, it can also be used as a supplementary text for upper-undergraduate and graduate-level courses on “Digital Image Processing”, “Information Security”, “Machine Learning”, “Computer Vision” and “Multimedia Security and Forensics”.
Author: Hany Farid
Publisher: MIT Press
ISBN: 0262354462
Category : Computers
Languages : en
Pages : 232
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Book Description
A concise and accessible guide to techniques for detecting doctored and fake images in photographs and digital media. Stalin, Mao, Hitler, Mussolini, and other dictators routinely doctored photographs so that the images aligned with their messages. They erased people who were there, added people who were not, and manipulated backgrounds. They knew if they changed the visual record, they could change history. Once, altering images required hours in the darkroom; today, it can be done with a keyboard and mouse. Because photographs are so easily faked, fake photos are everywhere—supermarket tabloids, fashion magazines, political ads, and social media. How can we tell if an image is real or false? In this volume in the MIT Press Essential Knowledge series, Hany Farid offers a concise and accessible guide to techniques for detecting doctored and fake images in photographs and digital media. Farid, an expert in photo forensics, has spent two decades developing techniques for authenticating digital images. These techniques model the entire image-creation process in order to find the digital disruption introduced by manipulation of the image. Each section of the book describes a different technique for analyzing an image, beginning with those requiring minimal technical expertise and advancing to those at intermediate and higher levels. There are techniques for, among other things, reverse image searches, metadata analysis, finding image imperfections introduced by JPEG compression, image cloning, tracing pixel patterns, and detecting images that are computer generated. In each section, Farid describes the techniques, explains when they should be applied, and offers examples of image analysis.
Author: Larry Daniel
Publisher: Elsevier
ISBN: 159749643X
Category : Computers
Languages : en
Pages : 364
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Book Description
Section 1: What is Digital Forensics? Chapter 1. Digital Evidence is Everywhere Chapter 2. Overview of Digital Forensics Chapter 3. Digital Forensics -- The Sub-Disciplines Chapter 4. The Foundations of Digital Forensics -- Best Practices Chapter 5. Overview of Digital Forensics Tools Chapter 6. Digital Forensics at Work in the Legal System Section 2: Experts Chapter 7. Why Do I Need an Expert? Chapter 8. The Difference between Computer Experts and Digital Forensic Experts Chapter 9. Selecting a Digital Forensics Expert Chapter 10. What to Expect from an Expert Chapter 11. Approaches by Different Types of Examiners Chapter 12. Spotting a Problem Expert Chapter 13. Qualifying an Expert in Court Sections 3: Motions and Discovery Chapter 14. Overview of Digital Evidence Discovery Chapter 15. Discovery of Digital Evidence in Criminal Cases Chapter 16. Discovery of Digital Evidence in Civil Cases Chapter 17. Discovery of Computers and Storage Media Chapter 18. Discovery of Video Evidence Ch ...
Author: Nick Marsh
Publisher: John Wiley & Sons
ISBN: 1118852737
Category : Law
Languages : en
Pages : 421
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Book Description
Forensic photography plays a vitally important part in the investigation of crime and the subsequent administration of justice. Written by a practitioner with many years professional experience, this book provides an overview of the most common forensic photography techniques in use today for those readers who may not have a detailed understanding of camera techniques and who need to get to grips with the use of light and other key scientific aspects of the job. It covers image capture issues, file handling and relevant equipment, such as lasers and UV lights, and explores how they work. The predominance of the digital camera has resulted in an increasing trend for police forces across the world to use untrained camera users, rather than expert photographers. Therefore, this book will prove invaluable for those practitioners who need to produce accurate and clear photographic evidence, above and beyond the point and shoot mode on their cameras.
Author: Norman Marin
Publisher: Routledge
ISBN: 1455775487
Category : Law
Languages : en
Pages : 103
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Book Description
Alternate Light Source Imaging provides a brief guide to digital imaging using reflected infrared and ultraviolet radiation for crime scene photographers. Clear and concise instruction illustrates how to accomplish good photographs in a variety of forensic situations. It demonstrates how tunable wavelength light sources and digital imaging techniques can be used to successfully locate and document physical evidence at the crime scene, in the morgue, or in the laboratory. The scientific principles that make this type of photography possible are described, followed by the basic steps that can be utilized to capture high quality evidentiary photographs. About the Forensic Studies for Criminal Justice Series: The Forensic Studies for Criminal Justice series consists of short-format content on new developments, unique perspectives, or how-to information on areas in forensic science—all specifically designed to meet the needs of the criminal justice community. Instructors wishing to provide their students with more in-depth coverage on certain forensic areas can add these digestible, inexpensive works to their syllabi without having to completely redesign their course, introduce overly complex material, or financially overburden their students. Law enforcement and other criminal justice professionals will find a wealth of valuable information to improve training sessions. Written by experts in the disciplines they are covering and edited by a senior scholar in criminal justice, Forensic Studies for Criminal Justice opens up the world of forensic science to the criminal justice community. Part of a new Anderson series presenting brief works on forensic science, written especially for students and law enforcement Clear, concise instruction on the fundamentals of alternate light source imaging Covers a variety of crime scene situations Full-color images
Author: George Reis
Publisher: John Wiley & Sons
ISBN: 0470198850
Category : Computers
Languages : en
Pages : 290
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Book Description
Digital imaging technology has been used in forensics since at least 1992, yet until now there?has been?no practical instruction available to address the unique issues of image processing in an everyday forensic environment. Photoshop CS3 for Forensics Professionals serves the everyday, real-world needs of law enforcement and legal personnel dealing with digital images (including both photos and video stills). This book is an excellent tool for: Law enforcement personnel, from crime scene and arson investigators, detectives, and patrol officers to forensic photographers, fingerprint examiners, video analysts, tool mark and footwear examiners, and criminalists. Security pros in such fields as private investigation, insurance, fraud detection, and loss prevention. Scientific and technical users of Photoshop with workflows similar to law enforcement, such as medical photographers, research imaging experts, engineering and architecture staff, and industrial photographers. Staff responsible for maintaining a photo archive or printing images for court. Photoshop CS3 for Forensics Professionals is the only book to provide forensics professionals with specific answers to their imaging questions. This is the perfect resource for those who want to move from simple theory to the essential skills needed to be more effective. This resource is dividied into three parts: Part I: The Essentials is about setting up your workflow, archiving your images, and familiarizing yourself with Adobe Photoshop and Adobe Bridge, including the setting up of preferences. Also covered are the best practices in writing reports and providing courtroom testimony. Part II: The Digital Darkroom teaches how to use Photoshop to accomplish what traditionally was done in the darkroom, from correcting color casts to making prints and exhibits for courtroom use. Part III: Image Analysis & Enhancement covers techniques for clarifying images so that details can be better viewed and used for analysis or comparison, from contrast enhancement and pattern removal to even forensic video analysis. The companion CD-ROM provides sample images—including various accident and crime scenes—you can use to practice the techniques from the book while?following along with the tutorials. It also includes several scripts, plug-ins, and actions so you can work more effectively. In addition, instructor's materials are available so you can use book in workshops and training seminars. Order this one-of-a-kind resource today! Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.
Author: James (Jong Hyuk) Park
Publisher: Springer Science & Business Media
ISBN: 9400727925
Category : Technology & Engineering
Languages : en
Pages : 822
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Book Description
Computer Science and Convergence is proceedings of the 3rd FTRA International Conference on Computer Science and its Applications (CSA-11) and The 2011 FTRA World Convergence Conference (FTRA WCC 2011). The topics of CSA and WCC cover the current hot topics satisfying the world-wide ever-changing needs. CSA-11 will be the most comprehensive conference focused on the various aspects of advances in computer science and its applications and will provide an opportunity for academic and industry professionals to discuss the latest issues and progress in the area of CSA. In addition, the conference will publish high quality papers which are closely related to the various theories and practical applications in CSA. Furthermore, we expect that the conference and its publications will be a trigger for further related research and technology improvements in this important subject. The main scope of CSA-11 is as follows: - Mobile and ubiquitous computing - Dependable, reliable and autonomic computing - Security and trust management - Multimedia systems and services - Networking and communications - Database and data mining - Game and software engineering - Grid, cloud and scalable computing - Embedded system and software - Artificial intelligence - Distributed and parallel algorithms - Web and internet computing - IT policy and business management WCC-11 is a major conference for scientists, engineers, and practitioners throughout the world to present the latest research, results, ideas, developments and applications in all areas of convergence technologies. The main scope of WCC-11 is as follows: - Cryptography and Security for Converged environments - Wireless sensor network for Converged environments - Multimedia for Converged environments - Advanced Vehicular Communications Technology for Converged environments - Human centric computing, P2P, Grid and Cloud computing for Converged environments - U-Healthcare for Converged environments - Strategic Security Management for Industrial Technology - Advances in Artificial Intelligence and Surveillance Systems
