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Adaptive block sized reversible watermarking scheme based on integer transform

机译:基于整数变换的自适应块大小可逆水印方案

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We propose a new reversible image watermarking scheme using adaptive embedding with block varying. Reversible watermarking scheme provides the possibility of recovering original image after watermark extraction process achieve without any distortion. The developed scheme divides an image into blocks of size 2×2, and applies 2D-difference expansion method via integer wavelet transform. The watermark insertion process is adaptive to each block owing to the degree of distortion induced by this modification. The selection of block useful for embedding is applied by an optimized algorithm by considering Particle Swarm Optimization-PSO to determine the best threshold that can't exceed distortion. For more precision, we have modulated the size of selected block and conclude the best one which maximizes our algorithm performances.
机译:我们提出了一种新的可逆图像水印方案,该方案使用了具有块变化的自适应嵌入。可逆水印方案提供了在水印提取过程实现后恢复原始图像而没有任何失真的可能性。所开发的方案将图像分成大小为2×2的块,并通过整数小波变换应用2D差分展开方法。由于此修改引起的失真程度,水印插入过程适用于每个块。通过考虑粒子群优化-PSO来确定不超过失真的最佳阈值,由优化算法应用对嵌入有用的块的选择。为了获得更高的精度,我们对选定块的大小进行了调制,并得出了最佳块,该块使我们的算法性能最大化。

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