The invention discloses a non-additive steganography method for enhancing JPEG image block boundary continuity. According to the method, multiple rounds of embedding are adopted, carriers and distortion of the next round are updated after each round of embedding, damage of embedding to block boundary continuity is made up by updating a part of carriers without embedded messages, damage caused by next round of embedding is prevented by updating distortion, and therefore the carriers and distortion are updated to maintain airspace block boundary continuity. Experimental results show that the method provided by the invention can better maintain the boundary continuity of the spatial domain block and further improve the steganography anti-detection performance.

Non-additive steganography method for enhancing JPEG image block boundary continuity

The invention discloses a non-additive distortion JPEG image steganography method based on a block effect. Based on the blocking effect of a JPEG image, the invention provides a method for guiding thedistortion cost to be adjusted towards the direction of reducing the blocking effect. Through combination of blocking effect evaluation and local distortion cost adjustment, improvement of an existing mainstream JPEG steganography algorithm is realized, and detection of current most advanced high-dimensional steganography analysis features is resisted. The method has the advantages that the current mainstream JPEG steganography algorithm is based on steganography of additive distortion cost and is easily detected by high-dimensional steganography analysis features, and the correlation betweenimage elements is kept based on the blocking effect from the perspective of non-additive distortion cost, so that the steganography concealment and safety are improved. The method has high universality and is beneficial to improving the safety of the JPEG steganography algorithm.

Wu Junqi

Papers

Non-additive distortion JPEG image steganography method based on block effect