摘要
高动态范围(High Dynamic Range,HDR)图像具有丰富的细节信息和更大的亮度范围,但为了能够在普通的显示设备上显示,需要对HDR图像进行色调映射(Tone Mapping,TM)预处理。因此,本文结合HDR图像独特的存储格式和TM是非线性攻击的特点,提出了一种抵抗TM攻击的HDR图像鲁棒性水印算法。首先,为了提高水印算法的鲁棒性,结合TM曲线特点,设计了一个基于亮度和纹理的混合掩模;其次,利用冗余小波变换和奇异值分解提取宿主图像的结构信息进行水印嵌入;最后,设计了一种嵌入位置自适应选择机制,对算法的不可见性进行优化。实验结果表明,所提出的算法可以有效地对抗现有TM的攻击,并且具有较好的不可见性和较高的嵌入容量。
High dynamic range （HDR） images have abundant details and wide dynamic range of luminance. In order to be displayed on a common device, a tone mapping （TM） is required. In this paper, considering the unique storage format of HDR images and the fact that TM is a kind of non-linear attack, a robust watermarking algorithm for HDR images is proposed. Firstly, in order to improve the robustness of the algorithm, a hybrid mask is designed based on the luminance and texture. Then, redundant discrete wavelet transformation and singular value decomposition are used to extract the structural information of the host image. Finally, for optimizing the invisibility of the algorithm, an adaptively selective mechanism of location is designed. The experiment results show that the proposed algorithm can effectively resist the attack of existing TMs. In addition, it has a super imperceptibility and embedding capacity.
出处
《激光杂志》
北大核心
2017年第12期48-54,共7页
Laser Journal
基金
国家自然科学基金(61671258)
浙江省自然科学基金(LY15F010005)
关键词
高动态范围图像
数字水印
色调映射
冗余小波变换
奇异值分解
high dynamic range image
digital watermarking
tone mapping
redundant discrete wavelet transfor- mation
singular value decomposition
