一种基于HVS模型的变换域数字水印算法

A DCT-domain Watermarking Algorithm Based on HVS

以人类视觉系统和离散余弦变换为基础,提出一种基于HVS感知模型的DCT域块分类水印算法。首先在水印嵌入前对水印进行了置乱,其次利用DCT域HVS的感知模型和图像亮度块的特征来控制嵌入水印的位置和强度,有效地提高了载体的保真性和水印的鲁棒性。实验结果表明,利用该算法实现的水印系统很好地兼顾了水印的透明性和鲁棒性,具有一定的实用价值。

On the base of human visual system and discrete cosine transform, a DCT-Domain block classified Watermarking Algorithm based on HVS apperceive model is put forward. Firstly, watermarking image is set chaos, secondly, watermarking embedded position and intension are controlled by HVS apperceive model for DCT- Domain and image brightness, carrier fidelities and watermarking robust are effectively advanced. Experiment testify, this Algorithm ensures watermarking transparence and robust, and can be application.