An Image Authentication and Recovery Method Using Optimal Selection of Block Types

Author

Chun-Hung Chen ; Yuan-Liang Tang ; Wen-Shyong Hsieh

Author_Institution

Dept. of Comput. Sci. & Eng., Nat. Sun Yat-sen Univ., Kaohsiung, Taiwan

fYear

2014

fDate

10-12 Dec. 2014

Firstpage

151

Lastpage

154

Abstract

In this paper, we present an authentication and recovery scheme to protect images. The image blocks are DCT transformed and then encoded with different patterns. An optimal selection is adopted to find the best pattern for each block which results in better image quality. Both the recovery and check data are embedded for data protection. The experimental results demonstrate that our method is able to identify and localize regions having been tampered with. Furthermore, good image quality for both watermarked and recovered images are well preserved.

Keywords

data protection; image coding; image watermarking; DCT transform; data check; data protection; image authentication method; image encoding; image protection; image quality; image recovery method; image tampering; optimal image block type selection; region identification; region localization; watermarked images; Airplanes; Authentication; Boats; Discrete cosine transforms; Image quality; PSNR; Watermarking; digital watermarking; fragile watermarks; image authentication; rate-distortion optimization;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia (ISM), 2014 IEEE International Symposium on

Conference_Location

Taichung

Print_ISBN

978-1-4799-4312-8

Type

conf

DOI

10.1109/ISM.2014.10

Filename

7033013