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Based on integer wavelet transform (IWT), the author uses the idea of radius-weighted mean (RWM) and present a high-capacity color image watermarking scheme. More specifically, the Euclidean distance of RWM and centroid is used as the embedding criterion, a watermark is hidden in the low-low (LL) subbnad of IWT domain. To further promote payload size, the criterion of Euclidean norm of RWM is employed...
In this paper, a novel reversible watermarking method based on the coefficient adjustment technique is proposed. A host image is first decomposed into the integer wavelet transform (IWT) domain. Subsequently, a secret message is embedded into the low-high (LH), high-low (HL), and high-high (HH) sub-bands of the IWT using the coefficient adjustment method. Experiments confirm that the proposed method...
A simple and effective lossless data hiding algorithm is presented. Based on integer wavelet transform (IWT), a secret message is embedded in the three high subbands of IWT domain by the proposed coefficient-bias algorithm. More specifically, to provide a higher hidden space without severe distortion, only the coefficients of each block that located in a predetermined interval are utilized to hide...
A DCT-based digital watermarking by using quotient-embedding scheme with smart arrangement technique is proposed. To increase the hidden capacity while maintaining the robustness of the proposed method, input data are first bundled to a set of 4-octet with a smart arrangement and then embedded in the predetermined low- and middle-frequency coefficients of a DCT block. Simulations show that the mixed...
A simple digital watermarking based on integer wavelet transform (IWT) is proposed. Instead of hiding data bits directly to the blocks, we employ adaptive bit-labeling scheme to a block so that it can be used to carry a data bit 0 or 1. Simulations show that the proposed method robustness against manipulations such as JPEG2000, JPEG, cropping, (color) quantization, noise additions, low-pass filtering,...
A simple watermarking scheme based on the discrete cosine transform (DCT) is proposed. To increase the hidden capacity while maintaining the robustness of the proposed method, the authors use quotient-embedding algorithm to hide the secret message in the selected low-frequency coefficients of a DCT block. Simulations show that the stego-images generated by the proposed method do robustness against...
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