Determination of digital watermarking optimal detection threshold based on asymptotically optimal detector
基于渐近优化检测器的数字水印最佳检测阈值的确定

The magnitude of detection thresh will influence the effect of watermarking detector. The asymptotically optimal detector is a blind watermarking detection adopting Rao test, but its detection thresh is determined by experience. In order to make asymptotically optimal detection thresh more objective and accurate, the minimum error probability criterion was analyzed. The detection thresh based on asymptotically optimal detector was theoretically deduced to gain an expression of optimal detection thresh which made error rate of watermarking detection system lowest. Simulation results indicate that this method is adaptive and objective and can make error rate of watermarking detection system theoretically minimum.