Journal of Applied Sciences ›› 2018, Vol. 36 ›› Issue (2): 267-277.doi: 10.3969/j.issn.0255-8297.2018.02.006

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

Analysis and Improvement of a Reversible Hiding Algorithm in Encrypted Domain

DENG Min, CHEN Fan, HE Hong-jie, YAN Shu   

  1. School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, China
  • Received:2018-01-31 Online:2018-03-31 Published:2018-03-31

Abstract:

It is analyzed that the four-adjacent-pixel prediction reversible information hiding algorithm cannot achieve a lossless recovery from encrypted images. In order to achieve the errorless recovery of the original image, a new the pixel-type is proposed by combining four neighborhoods with pixel to be predicted itself, and compressing type-mark matrix, which is used to record the smoothness of the pixels, and embedding it into the smooth pixels. Accordingly, in the recovery phase, the original image can be recovered perfectly with the help of the extracted type-mark matrix and its neighbor pixels. Experimental results demonstrate that the proposed method can achieve real reversibility, and further improve the embedding capacity and the quality of decryption image.

Key words: information hiding, encryption domain, reversible

CLC Number: