科研之友
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摘要
A Fuzzy Image-Adaptive (F-IA) watermarking algorithm of images in Discrete Cosine Transform (DCT) domain is proposed in this paper. The algorithm utilizes the visual masking and texture characteristics of human visual system (HVS) to achieve the invisible and robust requirements for watermarking. A 2-D fuzzy controller, in which the inputs are parameters of the gray and texture of DCT blocks of the original image and the output is strength of watermark embedded, is designed. The fuzzy inference algorithm ensures that the watermark to be embedded into the original image adaptively. Because a binary image watermark signal is designed and is encrypted by a chaotic cipher sequence before it is embedded, our watermark scheme is secured doubly. The experimental results show that the algorithm is robust to common digital image processing methods and the quality of the image is guaranteed The proposed watermarking system is easily to be realized in real-time and is hardware-based.
- 出版日期2002-10
- 单位西安交通大学
