caa a22 4500 605447810 CHVBK 20210128100133.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s11042-014-1882-9 doi (NATIONALLICENCE)springer-10.1007/s11042-014-1882-9 Self-embedding fragile watermarking based on DCT and fast fractal coding [Elektronische Daten] [Xuanping Zhang, Yangyang Xiao, Zhongmeng Zhao] A self-embedding fragile watermarking scheme is proposed in this paper, which is based on Discrete Cosine Transform and fractal compression coding. To overcome the high computational complexity of fractal coding, a fast coding method is also presented that improves the efficiency of fractal block coding in the watermarking procedure. In our algorithm, three kinds of watermarks are generated for image authentication and recovery, which is based on an interleaved and overlapped 8 ×8 image block structure. This makes our method obtain an authentication granularity of 4 ×4 approximately. At the same time, we take advantage of two levels of mapping to select mapping block for every image block. Three versions of recovery watermarks for each block are embedded in different quadrants, which provides another two chances for block recovery in case one is destroyed. Experimental results demonstrate that the proposed scheme not only outperforms conventional self-embedding fragile watermarking algorithms in tamper recovery, but also improves the security against the various counterfeiting attacks. Springer Science+Business Media New York, 2014 Fragile watermarking nationallicence Self-embedding nationallicence Discrete cosine transform nationallicence Fractal image compression nationallicence Zhang Xuanping The School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049, Xi'an, China aut Xiao Yangyang The School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049, Xi'an, China aut Zhao Zhongmeng The School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049, Xi'an, China aut Multimedia Tools and Applications Springer US; http://www.springer-ny.com 74/15(2015-08-01), 5767-5786 1380-7501 74:15<5767 2015 74 11042 https://doi.org/10.1007/s11042-014-1882-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11042-014-1882-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Xuanping The School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049, Xi'an, China aut NATIONALLICENCE 700 1- Xiao Yangyang The School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049, Xi'an, China aut NATIONALLICENCE 700 1- Zhao Zhongmeng The School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049, Xi'an, China aut NATIONALLICENCE 773 0- Multimedia Tools and Applications Springer US; http://www.springer-ny.com 74/15(2015-08-01), 5767-5786 1380-7501 74:15<5767 2015 74 11042