基于DCT变换下的DM-QIM数字图像水印算法

基于DCT域下的水印算法相对于空域中水印算法具有更好的稳定性,更大的容量,以及更好的隐蔽性,同时在借助人类的感知模型的情况下能设计出具有较好保真度的水印系统。本论文对DM-QIM(Quantization Index Modulation)水印方案进行了系统的研究,介绍了这种数字水印算法的原理及模型,探究了数字水印的嵌入和提取方案,最后对实验结果做了分析和总结。

The DM-QIM Digital Image Watermarking Algorithm Based on DCT Transformation

DCT-based watermarking algorithm with respect to the airspace watermarking algorithm has strong robustness, and larger capacity, better concealment. While using human perception model can design better fidelity watermarking system. This chapter examines a DM-QIM（Quantization Index Modulation） watermarking scheme, describes the principle of the digital watermarking algorithm and model to analyze the digital watermark embedding and extraction program, finally analyzes and summarizes the experimental results.