In this research, we proposed a hybrid method to improve performance of extraction process of the digital watermarking by applying the multiple sections embedding technique together with DWT digital watermarking method in the embedding process. The YCbCr colour space was selected for embedding and extracting a watermark signal. Also, a new pixel prediction method is presented for improving the accuracy of extraction process by using adaptive filter depended on pixel variance of the prediction area. A set of experiments is created to support the proposed concepts including image under attack conditions and non-attack condition. The results of the experiments show the improvement of the extraction performance in term of normal correlation (NC). Also, the improvements in term of robustness against various types of attack e.g. JPEG compression attack, blurring attack, brightness adjustment attack, etc. are significantly increased. Especially in cropping attacks and compression attacks, the results strongly improve in terms of NC value compared to previous proposed algorithm.
Komwit Surachat, Prince of Songkla University, Thailand
Wanicbut Wattanamatiphot, Prince of Songkla University, Thailand
Stream: Technology and Society: The Social and Societal Impact and Implications of Technology
This paper is part of the ACSET2014 Conference Proceedings (View)
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