Information Hiding in Static Image Based on Self-Organizing Map
| Autor: | Chi-Wei Shih, 石琢暐 |
|---|---|
| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 Originally, for studies in information hiding using vector quantization(VQ) techniques, data or images are encrypted before they are embedded into a cover image. However, using such a scheme is difficult to determine the capacity that a cover image can manage. In this study, an information hiding scheme using Self-Organizing Map and Least Significant Bit techniques is proposed to facilitate hiding unencrypted information in cover images. With the proposed scheme, the information hiding capacity of a cover image is deterministic; a cover image can embed information that its size is slightly less than the size of the cover image. Comparing with Linde-Buzo-Gray(LBG) algorithm applied to traditional VQ, the proposed scheme produces better quality of stego and secret images based on PSNR measurement. There are no significant quality differences between the proposed scheme and VQ, if secret information is in audio format. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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