Watermarking for HDR Image Robust to Tone Mapping
Watermarking for HDR Image Robust to Tone Mapping
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DOI：
10.1587/transfun.e94.a.2334
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发表时间：
2011-11
期刊：
影响因子：
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通讯作者：
Xinwei Xue;Takao Jinno;Xin Jin;M. Okuda;S. Goto
中科院分区：
文献类型：
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作者：
Xinwei Xue;Takao Jinno;Xin Jin;M. Okuda;S. Goto
高动态范围（HDR）图像在日常应用中得到了广泛的应用。然而，HDR图像是一种特殊的格式，它需要进行预处理，称为色调映射算子的显示。由于HDR图像的视觉质量对亮度值变化非常敏感，因此用于低动态范围（LDR）图像的常规水印方法是不合适的，并且甚至可能导致灾难性的可见失真。目前，针对HDR图像的水印算法还不多见。提出了两种针对HDR图像的水印算法，分别基于μ-Law和双边滤波。这两种方法都大大提高了水印图像的主观和客观质量。更重要的是，这些方法也表现出更高的鲁棒性对色调映射操作。
High Dynamic Range (HDR) images have been widely applied in daily applications. However, HDR image is a special format, which needs to be pre-processed known as tone mapping operators for display. Since the visual quality of HDR images is very sensitive to luminance value variations, conventional watermarking methods for low dynamic range (LDR) images are not suitable and may even cause catastrophic visible distortion. Currently, few methods for HDR image watermarking are proposed. In this paper, two watermarking schemes targeting HDR images are proposed, which are based on µ-Law and bilateral filtering, respectively. Both of the subjective and objective qualities of watermarked images are greatly improved by the two methods. What's more, these proposed methods also show higher robustness against tone mapping operations.