Dae-Jin Jung

Learn More
With advances in digital camcorders, recapturing commercial videos called camcorder theft is getting a big problem. In this paper, we propose an automatic detection method for recaptured videos based on the photo response non-uniformity (PRNU). To discern a recaptured video, a given video is divided into shots first. Several usable shots are selected and(More)
Digital watermarking is one of the most fundamental techniques to protect copyright of digital contents. However, many watermarking systems are still weak against resampling attacks. In this paper, we propose a reinforcement scheme to complement conventional image watermarking systems by analyzing the periodic property of the interpolation. We first(More)
The authors report the case of a 52-year-old man who had undergone resection of an ossified posterior longitudinal ligament via the anterior approach. The patient experienced postoperative neurological deterioration that may have been caused by a massive cord herniation associated with a dural defect at the corpectomy site. Spinal cord herniation may(More)
With the advances in digital video technology, it is becoming easier to forge the digital video without introducing any artificial visual trace. The temporal domain of the digital videos is one of the main targets of video tampering, and video frame-rate conversion is one of the common operations for temporal video tampering such as temporal splicing and(More)
Bio-cryptographic systems provide security by securing a cryptographic key with biometric data. To secure the cryptographic key, biometric data should be significantly consistent. However, the uncertainty of biometrics makes it complicated to achieve highly accurate authentication. In this paper, we propose a novel bio-cryptographic authentication scheme(More)
  • 1