一种DCT域子采样的鲁棒可去性盲水印

随着多媒体技术的发展,图像信息安全已引起学者的广泛关注。数字水印技术是图像信息隐藏和版权保护的一种有效工具。在子采样和图像分块的基础上,采用新的跳跃取点策略。该策略对隐秘图像连续区域的剪切攻击具有鲁棒性。同时,由于水印的嵌入会对图像造成一定程度的失真,因此尝试对水印进行移除操作。实验结果表明,该方法不仅对噪声和常规的图像处理攻击具有鲁棒性,尤其对剪切攻击具有很强鲁棒性,而且还具有很好的不可视性。

Robust and remove watermark via sub-sample in DCT domain

With the development of multimedia technology,the image information security has attracted the attention of scholars.Digital watermarking technology is an effective tool for image information hiding and copyright protection.In this paper,a new jump take-point strategy has been adopted based on sub-sample and image block.This strategy is robust to cropping attack in the continuous region of the watermarked image.Meanwhile,the image will have some distortion because of the embedded watermark,so we try to remove watermark.The experimental results show that the proposed method is robust to noise and general image processing attacks,especially to cropping attack with strong robustness,but also has good visibility.