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首页> 外文会议>IEEE International Symposium on Broadband Multimedia Systems and Broadcasting >Improved Spread transform Dither Modulation-based Watermark Algorithm Based on Step Projection
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Improved Spread transform Dither Modulation-based Watermark Algorithm Based on Step Projection

机译：基于步进投影的改进的扩展变换基于抖动调制的水印算法

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摘要

Quantization Index Modulation is an important class of watermark methods, which has been widely used in blind watermark applications. And it is well known that spread transform dither modulation (STDM), as an extension of QEM, has good performance in robustness to random noise and requantization. However, the quantization step sizes used in STDM are random numbers not taking the feature of the image into account. In this paper, we proposed a step projection-based STDM algorithm, which applies a novel way to incorporate the modified perceptual model with STDM framework. Experimental results indicate that our proposed scheme counters the weakness of the original STDM, the excessive sensitivity to valumetric scaling, successfully. Compared with the former proposed modified schemes of STDM, our proposed scheme have considerable advantages, especially in robustness to Gauss Noise, Salt&Pepper Noise and JPEG compression.
机译：量化指数调制是一种重要的水印方法，已广泛用于盲目水印应用。众所周知，扩展变换抖动调制（STDM）作为QEM的延伸，具有良好的性能，鲁棒性与随机噪声和重量化。然而，STDM中使用的量化步长是不占用图像的特征的随机数。在本文中，我们提出了一种基于步骤投影的STDM算法，该算法应用一种与STDM框架合并修改的感知模型的新方法。实验结果表明，我们提出的方案对原始STDM的弱点进行了抵制，对比较缩放的过度敏感性成功。与STDM的前一项修改方案相比，我们所提出的方案具有相当大的优点，特别是鲁棒性，对高斯噪音，盐和辣椒噪声和JPEG压缩。

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