感兴趣区域的数字水印方法

DIGITAL WATERMARKING METHOD IN REGIONS OF INTEREST

现有的大多数数字水印方法将水印嵌入整幅图像 ,而没有考虑图像的内容 ,但对于许多应用而言 ,图像的某些特定区域比其他区域更为重要 ,这些区域称为感兴趣区域。本文提出了一种感兴趣区域的数字水印方法 ,该方法将宿主图像进行 3层小波分解 ,在用户选定的感兴趣区域中嵌入水印。水印的检测不需要使用宿主图像。实验结果表明 ,水印是不可感知的 ,并且对于各种图像处理操作是鲁棒的。尤为重要的是 ,感兴趣区域得到了更好的保护。

Most existing watermarking techniques embed watermarks into the entire image without taking the image content into account.But for many applications,certain portions of an image are more important than the other regions,which are often called the regions of interest (ROI).In this paper,we propose a digital watermarking method in ROI.The host image is decomposed into 3 levels using a DWT,and the watermark is embedded into the ROI.The host image is not required for watermark detection.Experimental results have shown that the embedded watermark is perceptually invi￣sible and robust to various image processing operations.Most importantly,ROI does receive better protection.