结合WS残差法和MAP载体估计的隐写负载定位

doi:10.3969/j.issn.0255-8297.2014.04.010

Abstract

Abstract: This paper proposes a modified method of payload location aimed at least significant bit replacement (LSB-R) by combining weighed-stego (WS) residuals with maximum a posteriori (MAP) cover estimator.We use the WS residuals to locate payloads, and take the results as a priori information to apply the modified MAP cover estimator to get more accurate cover estimates. The residuals are then computed to locate payloads. Experimental results demonstrate effectiveness of the approach in locating payloads both on JPEGdecompressed images and originally lossless stored images. Furthermore, the proposed approach is suitable for payload location with different embedding rates.

Key words: steganalysis, LSB replacement, cover estimation, payload location

CLC Number:

TP391

YAN Xiao-meng, ZHANG Tao, LI Wen-xiang, PING Xi-jian. Locating Steganographic Payload by Combining WS Residuals and MAP Cover Estimator[J]. Journal of Applied Sciences, 2014, 32(4): 401-408.

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Locating Steganographic Payload by Combining WS Residuals and MAP Cover Estimator

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