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Improved invisible watermarking technique using IWT-DCT

机译：使用IWT-DCT改进的无形水印技术

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Invisible Image Watermarking is secret embedding scheme for hiding of secret image into cover image file and the purpose of invisible watermarking is copyrights protection. Image Watermarking have research challenges for increasing robustness against visual attacks and statistical attacks. Wavelet transformation based Image Watermarking techniques provide better robustness for statistical attacks in comparison to Discrete Cosine Transform domain and Spatial Domain based Image Watermarking. The combined technique of DWT and DCT provides advantages of both techniques. The DWT have disadvantage of fraction loss in embedding which increases mean square error and results decreasing PSNR. Robustness of watermarking technique is proportional to PSNR. The Proposed algorithm presents Hybrid Integer wavelet transform and discrete cosine transform based watermarking technique to obtain increased imperceptibility and robustness compared to DWT+DCT based watermarking technique. The proposed combined IWT+DCT based watermarking technique reduces the fractional loss compared to DWT based watermarking.
机译：隐形图像水印是隐藏秘密图像的秘密嵌入方案，进入封面图像文件，隐形水印的目的是版权保护。图像水印有研究挑战，以增加视觉攻击和统计攻击的鲁棒性。基于小波变换的图像水印技术为与离散余弦变换域和空间域的图像水印相比，统计攻击提供了更好的稳健性。 DWT和DCT的组合技术提供了两种技术的优点。 DWT在嵌入中的分数损失的缺点是增加均方误差和结果降低PSNR。水印技术的鲁棒性与PSNR成比例。所提出的算法呈现混合整数小波变换和基于离散的余弦变换的水印技术，与基于DWT + DCT的水印技术相比，获得了增加的难以置信和鲁棒性。与基于DWT的水印相比，所提出的IWT + DCT基础的水印技术可降低分数损耗。

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