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In this paper, we propose a watermarking scheme with high perceived quality for color images by using the Euclidean distance of radius-weighted mean (RWM) and centroid. Based on spatial domain, the proposed watermarking scheme can effectively embed a secret message in host images. Simulations demonstrate that the marked images generated by the proposed watermarking scheme are tolerant of versatile...
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, we propose a lossless data hiding based on smart boundary adjustment approach. More specifically, by preserving either the minimum or the maximum pixel values of the blocks, data bits can be effectively embedded into the blocks without any occurrence of overflow and underflow. Experiments confirm that perceived quality is good and the payload is large while our peak signal-to-noise...
With the advance in the medical image from photographic ï¬lm (analogy) to digital ï¬le, how to avoid medical image modiï¬ed by malice and hide the patient's information into their medical image has become the promising research issue. It is difï¬cult to embed the information of patient to medical images because most pixels of this kind of images are close to black or white. In this paper, an effective...
This paper proposes a robust video watermarking for H.264/AVC using block polarity and AC correlation schemes. In the proposed method, the intra frames are used for watermarking embedding and protection. Block polarity is obtained using the nonzero quantized DC coefficient in each integer DCT block. Then, the selective block polarity of DCT block is used to perform the Intra prediction modes for luminance...
In this paper, we propose a new loss less data hiding method by the adaptive coefficient-bias (ACB) algorithm. The proposed ACB algorithm involves two main steps: block-mean removal and pixel isolating. The block-mean removal first generates the difference blocks, which are obtained by subtracting each pixel of the host block from the predicted mean. Then, the pixel isolating minimizes distortion...
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...
A simple, effective data hiding method based on module substitution is proposed. A variety of confidential bits are embedded to each block in accordance with the base-value of the block. In addition, two fine-labeling procedures are employed in the proposed method to further alleviate the quantized error during data embedment. Simulations show that both PSNR and hiding rate generated by the proposed...
A new method using the RBTC and LSB substitution to hide data is proposed. Based on the RBTC, a simple LSB substitution is employed for embedding secret data to the resulting compressed images. Experiments show that the PSNR and hiding rate for the proposed method are good while the perceived quality is not bad. Since the perceptual quality of the mixed images are close to that of compressed images...
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