The correct image would be followed by the picture of the coin ( and the payoff ) ; the wrong one , by a scrambled image of a coin 正確的圖片后隨附(正常的)硬幣圖象(選中者將獲獎) ;錯誤的圖片后隨附扭曲的硬幣圖象。
Firstly , by analyzing former researches and visible watermark characteristics , a visible watermarking algorithm with feature of holding image content is realized . secondly , using redundant embedding technique to embed watermark and extracting watermark according to watermark content , a meaningful invisible watermarking scheme is proposed ; thirdly , combining with vision characteristics a resilient - prone scrambling algorithm and a restoring scheme of scrambled image with data loss are proposed , image scrambling technique of irregular region is discussed . based on the proposed algorithms , a digital watermarking system scheme is designed 通過分析前人的研究進展,結合可見水印特性,在小波域實現了一種具有圖像內容保持特性的可見水印算法;利用水印冗余嵌入技術進行水印嵌入,根據水印遭破壞的情況進行水印提取,給出一種有意義水印的嵌入和提取方案;結合視覺冗余特性提出并實現了一種易于恢復的圖像置亂算法和一種受損置亂圖像的恢復方案;探討了不規(guī)則區(qū)域的圖像置亂方法,在此基礎上,設計了一種置亂算法在數字水印算法中的應用框架;最后整合本文所提出的算法,實現了一個基于視覺特性的圖像水印系統(tǒng)。