An optimal adaptive quantization index modulation watermarking algorithm - 源码 - 源码 - 免费下载

An optimal adaptive quantization index modulation watermarking algorithm

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资源说明：A novel adaptive watermarking algorithm in discrete wavelet transform (DWT) based on quantization index modulation (QIM) technique is presented. The host image is decomposed into wavelet subbands, and then the approximation subband is divided into non-overlapping small embedding blocks. The secret watermark bit is embedded into singular value vector of each embedding block by applying QIM. To improve the invisibility and robustness of watermarking system, the quantization step for each embedding

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