Efficiency Improvement in Watermark Retrieval Process

Abstract

Presently, digital watermarking has been employed as a means for indicating the ownership of coppyrighted multimedia data. While many existing watermarking methods focused on the embedding method in order to achieve the imperceptibility and robustness characteristics, in this paper, a method for improving the efficiency in the watermark retrieval process by estimating the value of the original image is considered. The propossed method is based on a digital image averaging technique, which is widely applied in various frequency filters. By comparing different retrieval techniques, the experimental results showed that the improved performances could be obtained when applying the mean filter in the watermark retrieval process.