LEADER 03358nam 2200577 450 001 9910467784303321 005 20190503073446.0 010 $a0-262-35545-0 010 $a0-262-33722-3 035 $a(CKB)4970000000107842 035 $a(OCoLC)1082362430 035 $a(OCoLC-P)1082362430 035 $a(MaCbMITP)10451 035 $a(MiAaPQ)EBC5966553 035 $a(EXLCZ)994970000000107842 100 $a20200819d2016 uy 0 101 0 $aeng 135 $aurcnu|||unuuu 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aPhoto forensics /$fHany Farid 210 1$aCambridge, Massachusetts :$cThe MIT Press,$d2016. 215 $a1 online resource (336 pages) 311 $a0-262-03534-0 320 $aIncludes bibliographical references (pages [315]-317) and index. 330 $aThe 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. 606 $aPhotography$xRetouching 606 $aPhotographs$xInspection 606 $aPhotographs$vIdentification 606 $aTrick photography 606 $aPhotography, Handworked 606 $aImage analysis 606 $aForensic sciences 608 $aElectronic books. 615 0$aPhotography$xRetouching. 615 0$aPhotographs$xInspection. 615 0$aPhotographs 615 0$aTrick photography. 615 0$aPhotography, Handworked. 615 0$aImage analysis. 615 0$aForensic sciences. 676 $a770 700 $aFarid$b Hany$0864857 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910467784303321 996 $aPhoto forensics$91930414 997 $aUNINA