Steganographic data hiding in image processing using predictive differencing

作者：Weng C Y; Tso H K; Wang S J^*

来源：Opto-Electronics Review, 2012, 20(2): 126-133.

DOI：10.2478/s11772-012-0020-3

• pixel-value differencing (PVD)
• prediction error
• neighbouring pixel
• high image quality

In this paper, we propose a stenography scheme based on predictive differencing to embed data in a grey-image. In order to promote the embedding capacity of pixel-value differencing (PVD), we use differencing between a predictive value and an input pixel as the predictive differencing to embed the message where a predictive value is calculated by using various predictors. If the predictive differencing is large, then it means that the input pixel is located in the edge area and, thus, has a larger embedding capacity than the pixel in a smooth area. The experimental result shows that our proposed scheme is capable of providing greater embedding capacity and high quality of stego-images then previous works. Furthermore, we have also applied various predictors to evaluate our proposed scheme.

• 出版日期2012-6