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The capability of new powerful multimedia authoring tools have enabled more widespread development of learning environments that facilitate the exploration and solution to complex and realistic problems. In addition, the consumption of mental abilities is another significant problem in learning....
This paper presented a novel watermarking method to embed a watermark into an image. To improve the transparency and robustness of watermark embedding, a visual model was employed to calculate the block based just noticeable difference (JND), and the three sub-bands of coefficient matrix in the...
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