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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Embedding Ratio Estimating for Each Bit Plane of Image
verfasst von : Chunfang Yang, Xiangyang Luo, Fenlin Liu
Erschienen in: Information Hiding
Verlag: Springer Berlin Heidelberg
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MSLB replacement steganography has attracted researchers’ attentions. However, existing steganalysis methods for MLSB replacement steganography have been just designed under the assumption that the embedding ratios in all stego bit planes are equal. Therefore, when the messages are embedded into different bit planes with different lengths independently, a new, principled method is introduced to estimate the embedding ratio in each stego bit plane based on a sample pair model. The new method estimates the embedding ratio in each bit plane in sequence according to the priority of each bit plane’s significance. A series of experiments show that the presented steganalysis method has significantly smaller bias than applying SPA method, a typical steganalysis for LSB steganography, to estimate the embedding ratio in each bit plane directly.