Motoi IWATA


Information Hiding and Its Criteria for Evaluation
Keiichi IWAMURA Masaki KAWAMURA Minoru KURIBAYASHI Motoi IWATA Hyunho KANG Seiichi GOHSHI Akira NISHIMURA 
Publication:   
Publication Date: 2017/01/01
Vol. E100-D  No. 1  pp. 2-12
Type of Manuscript:  INVITED PAPER (Special Section on Enriched Multimedia —New Technology Trends in Creation, Utilization and Protection of Multimedia Information—)
Category: 
Keyword: 
information hidingevaluation criteriadigital watermarkingstill imagevideoaudioIHC committee
 Summary | Full Text:PDF(1.3MB)

Practical Watermarking Method Estimating Watermarked Region from Recaptured Videos on Smartphone
Motoi IWATA Naoyoshi MIZUSHIMA Koichi KISE 
Publication:   
Publication Date: 2017/01/01
Vol. E100-D  No. 1  pp. 24-32
Type of Manuscript:  Special Section PAPER (Special Section on Enriched Multimedia —New Technology Trends in Creation, Utilization and Protection of Multimedia Information—)
Category: 
Keyword: 
digital watermarkingvideo watermarkingrecaptured videosmartphonesignage
 Summary | Full Text:PDF(2.7MB)

Reversible Watermarking Method for JPEG Images
Akira SHIOZAKI Motoi IWATA Akio OGIHARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/07/01
Vol. E91-D  No. 7  pp. 2068-2071
Type of Manuscript:  LETTER
Category: Application Information Security
Keyword: 
watermarkreversible watermarkingJPEG image
 Summary | Full Text:PDF(265.5KB)

Correlation-Based Video Watermarking Method Using Inter-Frame Similarity
Motoo YAMAMOTO Akira SHIOZAKI Motoi IWATA Akio OGIHARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/01/01
Vol. E89-A  No. 1  pp. 186-193
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Information Hiding
Keyword: 
digital video watermarkcopyright protectioncorrelation-based watermarkingMPEGStirMark
 Summary | Full Text:PDF(502.9KB)

Digital Steganography Utilizing Features of JPEG Images
Motoi IWATA Kyosuke MIYAKE Akira SHIOZAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/04/01
Vol. E87-A  No. 4  pp. 929-936
Type of Manuscript:  PAPER
Category: Image
Keyword: 
steganographyJPEG compressionDCT
 Summary | Full Text:PDF(520.9KB)

Digital Watermarking Method to Embed Index Data into JPEG Images
Motoi IWATA Kyosuke MIYAKE Akira SHIOZAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/10/01
Vol. E85-A  No. 10  pp. 2267-2271
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Information Security
Keyword: 
index dataJPEG compressiondigital watermarksDCT
 Summary | Full Text:PDF(258.5KB)

Index Data Embedding Method Utilizing Quantitative Relation of Wavelet Coefficients
Motoi IWATA Akira SHIOZAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/10/01
Vol. E84-A  No. 10  pp. 2508-2513
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Information Security
Keyword: 
wavelet transformdigital watermarkindex dataimage signal
 Summary | Full Text:PDF(525.5KB)

Watermarking Method for Embedding Index Data into Images Utilizing Features of Wavelet Transform
Motoi IWATA Akira SHIOZAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/07/01
Vol. E84-A  No. 7  pp. 1772-1778
Type of Manuscript:  PAPER
Category: Image
Keyword: 
wavelet transformdigital watermarkindex dataimage signaldata hiding
 Summary | Full Text:PDF(1.8MB)

A Digital Image Watermarking Scheme Withstanding Malicious Attacks
Akira SHIOZAKI Jiro TANIMOTO Motoi IWATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/10/25
Vol. E83-A  No. 10  pp. 2015-2022
Type of Manuscript:  PAPER
Category: Information Security
Keyword: 
watermarkcopyright protectiondigital imagesID informationStirMark
 Summary | Full Text:PDF(7.1MB)