HSI鲁棒彩色图像数字水印算法

Robust Color Image Watermark Algorithm in HSI

提出了一种彩色图像数字水印算法,先将图像从RGB色彩空间变换到HSI色彩空间,在HSI模型中取I(强度)分量,结合JND自适应地嵌入水印,然后再反变换回RGB色彩空间,而且水印提取不需要原始图像和原始水印。实验结果表明该算法可以有效抵抗有损压缩、滤波、添加噪声等常见图像处理操作,尤其是对色深变换具有较好的鲁棒性,是一个有实用价值的算法。

A new digital watermark algorithm for color image is proposed by ①changing the original image from RGB colorspace to HSI color space;②auto-adaptively inserting the watermark into I component combined with JND ;③changing HSI into RGB again. The original images and watermarks are un-necessary for the detection. The experimental results show that the proposed algorithm is effective and robust to lossy compression, filtering, noising, and etc. Especially it receives better robustness under color depth transform.