摘要: This paper proposes a novel image watermarking scheme. technique uses 2-D discrete wavelet transform to decompose an into various frequency channels. A scaled is used as the watermark and inserted mid-frequency channel. The embedded produced by taking inverse of altered decomposition. size, non-zero scaling factor, channel in which inserted, filters can be security keys for extraction watermark. propose independent original image. compromise between visually perceptible artifacts resiliency preserving from attacks JPEG compression, median filtering, cropping achieved adjusting factor.
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