可靠的SVD浮水印主要是用來解決SVD浮水印的缺點。就本論文所提出的方法，主要是使用離散餘弦變換(DCT)和離散小波變換(DWT)，把浮水印嵌入到原本的影像中，這方法可以有效的使得SVD subspace 保留圖片重要的資訊。粒子群優(PSO)是用來找出合適的排例因子來得到建全的浮水印。實驗結果經由結合已存在的方法能有效的增進了效能。

The reliable SVD based watermarking is proposed to overcome the major drawbacks of SVD based image watermarking. In the proposed method, the principal components of the watermark are embedded into the host image in discrete cosine transform (DCT) and discrete wavelets transform (DWT). It makes use of the fact that the SVD subspace can preserve significant information of an image. The particle swarm optimization (PSO) is used for finding the suitable scaling factors to achieve the robust watermarking. The experimental result demonstrates the improved performance of the proposed method in comparison with the existing method.

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