02928cam a2200397 i 4500 594766 594766 946160458 US-DLC 20190818080755.0 160408s2016 maua b 001 0 eng 2016015126 GBB6J3869 bnb 9780262035347 0262035340 9780262537001 0262537001 40026570200 (OCoLC)946160458 DLC eng rda DLC YDXCP BTCTA BDX YDX GZM STF UBY YUS OCLCO VMI OCLCQ OCLCF UKMGB DLC AU pcc Alfaisal Main Library TR147 .F36 2016 Farid, Hany, author Photo forensics / Hany Farid Cambridge, MA : The MIT Press, [2016] ix, 323 pages : illustrations, color ; 23 cm text txt rdacontent unmediated n rdamedia volume nc rdacarrier Includes bibliographical references (pages 315-317) and index Physics-based -- Geometric -- Optical -- Sensor -- File -- Pixel -- Case studies -- Background 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 and 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-edition 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 videos and famously questionable photographs including "Golden Eagle Snatches Kid" and the Lee Harvey Oswald backyard photo. -- Back cover Photography, Handworked Photography Retouching Photographs Identification Image analysis Forensic sciences local 4 Print books. lcc BOOKS 0 0 lcc 0 0 AU AU GEN 2019-08-18 0 TR147 .F36 2016 AU00000000014635 2019-08-18 00:00:00 180.00 2019-08-18 BOOKS