Hiding secret data in images via predictive coding |
| |
Authors: | Yuan-Hui Yu [Author Vitae] |
| |
Affiliation: | a Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi, Taiwan 621, ROC b Department of Computer Science and Information Engineering, Providence University, Taichung, Taiwan 433, ROC |
| |
Abstract: | This paper presents a prediction-based image-hiding scheme that embeds secret data into compression codes during image compression. This scheme employs a two-stage structure: a prediction stage and an entropy coding stage. The secret data is embedded into the difference values of a given image after the prediction stage is performed.According to the experimental results, the image quality is better than Jpeg-Jsteg and its improved scheme (Inform. Sci. 141 (1-2) (2002) 123). The average image quality of the stego-images in the proposed scheme is greater than 50 dB when the hiding capacity is 1 bit per pixel, whereas those values in Jpeg-Jsteg and scheme in Chang et al. (Inform. Sci. 141 (1-2) (2002) 123) are 37.04 and 33.73 dB, respectively. The hiding capacity of the proposed scheme is 65,536 bits when the hiding capacity is 1 bit per pixel, whereas it is 53,248 bits in scheme (Inform. Sci. 141 (1-2) (2002) 123) and less than 3000 bits in Jpeg-Jsteg. |
| |
Keywords: | Predictive coding Image hiding Steganography Stego-image |
本文献已被 ScienceDirect 等数据库收录! |
|