Masataka Ejima
Kyushu University
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Publication
Featured researches published by Masataka Ejima.
international conference on image processing | 2001
Masataka Ejima; Akio Miyazaki
Copyright protection of digital contents become more and more important in accordance with the development of digital technology. As a solution of this problem, digital watermark technology is drawing great attention and various watermarking methods have been presented. However, it is difficult for us to decide which method is better than others, because the measure for evaluating their performance has not been established yet. We propose a method that evaluates the performance of a watermark technique in the frequency domain. Using the proposed method, we analyze and evaluate the DWT-based and DCT-based watermarking methods.
international conference on image processing | 2002
Masataka Ejima; Akio Miyazaki
Copyright protection of digital contents becomes more and more important in accordance with the development of digital technology. As a solution of this problem, digital watermark technology is drawing attention and various watermarking methods have been presented. However, it is difficult for us to decide which method is better than others, because the measure for evaluating their performance has not been established yet. We propose a method that evaluates the performance of the correlation-based watermarking technique in the frequency domain.
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences | 2000
Masataka Ejima; Aiko Miyazaki
ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications | 1998
Masataka Ejima; Akio Miyazaki; Taku Saito
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences | 2002
Masataka Ejima; Akio Miyazaki
Electronics and Communications in Japan Part Iii-fundamental Electronic Science | 2003
Masataka Ejima; Akio Miyazaki
Technical report of IEICE. DSP | 2000
Masataka Ejima; Akio Miyazaki
IEICE technical report. Circuits and systems | 2000
Masataka Ejima; Akio Miyazaki
IEICE technical report. Information theory | 1999
Masataka Ejima; Akio Miyazaki
