Multi-bits Fingerprinting forImageCaptured by Digital Camera
Won-gyum Kim, Yong-Seok Seo · 2005
Thispaperpresents a newimagefingerprinting schemewhichembedsmulti-bits fingerprinting codeandis robusttothecapturing attackby a digital camera.When capturing an imageby a digital camera,various kindsof distortions suchas noise, geometrical distortion and lens distortion areapplied simultaneously. Inthis paper, wepropose several steps toextract fingerprints fromthedistorted image. To embedfingerprinting codeintoanimagedesigning ofmulti-bits embedding isrequired. We embed64bitsinformation asa fingerprint intoa 512x512colorimage. Inordertorestore a captured imagefromgeometrical distortions a noise reduction filter isperformed andarectilinear tiling pattern isusedasa template. Actually amulti-bits fingerprinting codeisembedded repeatedly likea tiling pattern intothespatial domainofthe image. We showthattheextracting issuccessful fromtheimage captured byadigital camerathrough theexperiment.