高容量可逆式資料隱藏

A Reversible Data Hiding Scheme with High Data Capacity

許桓澄(Huan-Cheng Hsu)

指導教授 ： 黃育銘

國立暨南國際大學/科技學院/資訊工程學系/碩士(2019年)

https://doi.org/10.6837/ncnu201900203

摘要

近年來Qian及Zhang文獻探討以低密度奇偶檢查碼[1]去實作分散式訊源編碼[2]做可逆式資料隱藏，當編碼端做完影像加密與資料隱藏後，解碼端利用雙線性內插得到影像復原圖，再以一種類似錯誤更正概念的演算法得到高品質復原影像，如果解碼端同時擁有所有的解密金鑰，可將資料取處且對影像做完美復原。而本文將會以一種預測編碼的概念，改進影像預估圖的品質，並得到錯誤更少的高品質復原圖，且在不影響圖片品質的前提下增加資料隱藏量，我們無需使用分散式訊源編碼，就可將圖片做完美復原，可降低實作上的複雜度。

關鍵字

分散式訊源編碼 ； 可逆式資料隱藏 ； 雙線性內插 ； 預測編碼

並列摘要

Recently, Qian and Zhang discussed the implementation of reversible data hiding with the concept of distributed source coding. After the encoder encrypts the image and hides the data, the decoder uses bilinear interpolation to reconstruct an estimation of the image. It then improves the image quality by using a process known as one similar error-correcting scheme and a process of LDPC decoding.
In this paper, we will improve the quality of predicted image with the concept of predictive coding, and obtain high-quality restored image with fewer errors. We do not need to use the technique of distributed source coding. This allows an increase in the available data payload without reducing the image quality and the image can be reconstructed perfectly with lower computational complexity.

並列關鍵字

Reversible data hiding ； Distributed source coding ； Bilinear interpolation ； Predictive coding

參考文獻

[1] R. Gallager, "Low-Density Parity-Check Codes", IRE Trans. Inf. Theory, vol. 7, pp. 21–28, Jan. 1962.

[2] Z. Ni, Y. Shi, N. Ansari, and S. Wei, “Reversible data hiding,” in Proc. IEEE Int. Symp. Circuits and Systems, May 2003, vol. 2, pp. 912–915.

[3] X. Zhang, "Reversible data hiding in encrypted image" IEEE Signal Process. Lett., vol. 18, no. 4, pp. 255–258, Apr. 2011

[4]Hong, W.; Chen, T.; Wu, H. An improved reversible data hiding in encrypted images using side match.

[5]Liao, X.; Shu, C. Reversible data hiding in encrypted images based on absolute mean difference of multiple