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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...
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 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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