Abstract
Digital image watermarking is a useful solution to the problem of information security, copyright and network security. In this paper, we propose a watermarking algorithm for color image based HT and DWT. A binary image as watermark is embedded into green component or blue component of color image. The algorithm can satisfy the transparence and robustness of the watermarking system very well. The experiment based on this algorithm demonstrates that the watermarking is robust to the common signal processing techniques including JPEG compressing, adding noise, low pass filter, and mosaic.
Highlights
Today, as the digitization develops day by day, the protection of digital information becomes an urgent problem
We propose a watermarking algorithm for color image based HT and DWT
The experiment based on this algorithm demonstrates that the watermarking is robust to the common signal processing techniques including JPEG compressing, adding noise, low pass filter, and mosaic
Summary
As the digitization develops day by day, the protection of digital information becomes an urgent problem. There are many methods to embed the watermark It can be divided into two classes: spatial-domain watermarks and transform-domain watermarks. The spatial domain is so simple that the watermark can be damaged but the transform-domain algorithm can be resist intensity attack, watermark information can’t be damaged . Wavelet has the character of multi-resolution, which can avoid the rectangle brought by DCT. It has more application fields in engineering and computer science. A new blind watermarking algorithm that embeds a meaningful binary image into the color images is proposed based HT-DWT according to HT and DWT characteristics.
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