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- W2892248857 abstract "Digital watermarking is considered to be a potential and effective solution to protect digital content. The key issue of a watermarking system is the trade-off between the robustness and transparency. Therefore, in order to improve these two characters, this paper proposes a digital image watermarking scheme based on discrete cosine transform (DCT) and discrete wavelet transform (DWT). After the host image was transformed by DWT, the low frequency band was selected and divided into 8 × 8 blocks. And then, each block was transformed by DCT. Meanwhile, the watermark was improved security by being encrypted using ergodic matrix, thus it cannot be recognized after the decryption. At the embedding process, the DCT coefficients at the five rows of the bottom of each block were exchanged by comparing the scrambled watermark information. At the extracting process, the watermark was recovered by comparing the value of two adjacent coefficients in the DCT block. Experimental results show that the proposed scheme has good imperceptibility as well as good robustness against common watermark attacks, such as Gaussian low-pass filtering, histogram equalization, image brighten/darken, contrast decreasing, salt-pepper noise, average filtering and cropping." @default.
- W2892248857 created "2018-09-27" @default.
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- W2892248857 date "2018-01-01" @default.
- W2892248857 modified "2023-10-06" @default.
- W2892248857 title "A Secure Blind Watermarking Scheme Based on Dual Frequency Domains and Ergodic Matrix" @default.
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- W2892248857 doi "https://doi.org/10.1007/978-3-030-00015-8_18" @default.
- W2892248857 hasPublicationYear "2018" @default.
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