Journal of Applied Sciences ›› 2016, Vol. 34 ›› Issue (5): 555-563.doi: 10.3969/j.issn.0255-8297.2016.05.008

• Special Issue: Information Security of Multimedia Contents • Previous Articles     Next Articles

Steganalysis of JPEG Image Based on High-Dimensional Feature Regularization

SUN Wu-yi, FENG Guo-rui   

  1. School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China
  • Received:2016-07-31 Revised:2016-08-19 Online:2016-09-30 Published:2016-09-30

Abstract:

Steganalysis plays a vital role in information security. To improve recognition accuracy of JPEG stego-image, we establish a model of scatter matrix eigenspectrum, and purpose a new method to transfer training features of cover and stego images. The eigenspectrum is first modeled by its distribution and divided into three non-overlapping partitions: areas in which the eigenvalue drops rapidly, areas with stable eigenvalues, and areas of zero eigenvalue. The eigenvector is whitened and regularized in the three partitions with adaptive regularization. The result of these steps is a transfer matrix that transfers the input features. The features are now processed and extracted by picking the first t eigenvectors. The processed feature data are then trained with a Fisher linear discriminant (FLD) ensemble classifier. The result shows that recognition accuracy of JPEG stegoimages with the FLD ensemble is improved after the JPEG stego-image features are sorted, regularized and extracted.

Key words: JPEG steganalysis, eigenspectrum, Fisher linear discriminant (FLD), feature extraction, regularization

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