Wavelet-based Digital watermarking Using Multiple threshold

摘要: Recently, digital watermarking has been proposed as a viable solution to the need of copyright protection and authentication multimedia data. A robust wavelet-based watermark casting scheme retrieval technique are suggested in this paper. We present method which can add significant coefficients DWT domain, does not require original image detection process. In adaptive is developed select perceptually for each subband using multiple threshold. method, an threshold used reflect characteristics complexity image. The adaptively weighted different subbands achieve robustness well high perceptual quality. watermark, Gaussian random sequence added large but lowest domain. Experimental results show that algorithm produced visually very good watermarked invisibility human eyes against various processing compression attacks.