A novel reversible data hiding scheme with two-dimensional histogram shifting mechanism

Multimedia Tools and Applications - In this paper, we propose a novel reversible data hiding technique based on two-dimensional histogram shifting for quantized discrete cosine transformation...     

Adaptive image sharing based on the quadri-directional search strategy with meaningful shadows

Multimedia Tools and Applications - Image sharing is a technique that is used to protect the security of a secret image by placing it into shadows. In this paper, we propose a new image sharing...     

A novel steganography scheme for video H.264/AVC without distortion drift

Multimedia Tools and Applications - Many steganography schemes have been proposed for video sequences. However, the embedding capacity obtained by these schemes is still unsatisfactory. In this...     

Distortion-Free Data Embedding Scheme for High Dynamic Range Images

Distortion-free data embedding is a technique which can assure that not only the secret data is correctly extracted but also the cover media is recovered without any distortion after secret data is extracted completely.Because of these advantages,this technique attracts the attention of many researchers.In this paper,a new distortion-free data embedding scheme for high dynamic range(HDR) images is proposed.By depending on Cartesian product,this scheme can obtain higher embedding capacity while maintaining the exactly identical cover image and stego image when using the tone mapping algorithms.In experimental results,the proposed scheme is superior to Yu et al.’s scheme in regard to the embedding rate?an average embedding rate of 0.1355 bpp compared with Yu et al.’s scheme(0.1270 bpp).     

Effective reversible image steganography based on rhombus prediction and local complexity

Reversible image steganography attracts much attention of researchers since such technique has ability to reconstruct the original version of the host image losslessly after image steganography. In this paper, we propose a new reversible image steganography based on rhombus prediction and local complexity. To maintain good quality of stego images and to achieve high accuracy of tamper detection, the local complexity of each pixel is first evaluated, then, the prediction error is calculated by using rhombus prediction for embedding the authentication code. Experimental results demonstrated that the proposed scheme has ability to recover the original version of the host images. In addition, the proposed scheme obtains better performance than previous schemes in terms of tamper detection and image quality.     

Reversible data hiding for high quality images exploiting interpolation and direction order mechanism

Reversible data hiding can restore the original image from the stego image without any distortion after the embedded secret message is exactly extracted. In this paper, a novel, reversible, data hiding scheme for high quality images is proposed in spatial domain. To increase embedding capacity and enhance image quality, the proposed scheme classifies all pixels as wall pixels and non-wall pixels. For wall pixel, the interpolation error is used to embed secret data over the interpolation prediction method. In contrast, the difference value between the non-wall pixel and its parent pixel, which is defined by the direction order, is computed to hide secret data based on the histogram shifting. The experimental results demonstrate that our scheme provides a larger payload and a better image quality than some existing schemes. Moreover, the performance of the proposed scheme is more stable for different images.