Modelling the False Alarm and Missed Detection Rate for Electronic Watermarks

Theoretical modeling of watermarks allow prediction of the detector reliability and facilitates the development of more reliable systems. In particular, mathematical evaluation is relevant to estimate the rate at which false alarms" occur. In this paper, the probability of incorrect detection missed detection or false alarm is expressed in terms of the watermark-energy-to-image-luminance-variance ratio. We present some counterintuitive results which show for instance that the reliability of detection signi cantly depends on spatial correlation in watermark. Moreover we nd that a small but uncompensated random DC component in the watermark can have a signi cant e ect on the reliability. I Background New multi-media networks and services facilitate the dissemination of audio and video content, but at the same time make illegal copying and copyright piracy simple. This has created a need to embed copyright data in the content in an indelible way. Particularlyif watermarkdetection is ...

• Type: Conference
• Year: 1998
• Where: IH
• Authors: Jean-Paul M. G. Linnartz, Ton Kalker, Geert Depovere
• Keywords: Detector Reliability, False Alarm, IH 1998, Information Management, Watermarks Allow Prediction