Masaki KAWAMURA


Image Watermarking Technique Using Embedder and Extractor Neural Networks
Ippei HAMAMOTO Masaki KAWAMURA 
Publication:   
Publication Date: 2019/01/01
Vol. E102-D  No. 1  pp. 19-30
Type of Manuscript:  Special Section PAPER (Special Section on Enriched Multimedia — Making Multimedia More Convenient and Safer —)
Category: 
Keyword: 
digital watermarkingneural networkautoencoderdistributed representationsparse representation
 Summary | Full Text:PDF(1.5MB)

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)

Image Watermarking Method Satisfying IHC by Using PEG LDPC Code
Nobuhiro HIRATA Takayuki NOZAKI Masaki KAWAMURA 
Publication:   
Publication Date: 2017/01/01
Vol. E100-D  No. 1  pp. 13-23
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 watermarkingLDPC codeprogressive edge-growthinformation hiding criteria
 Summary | Full Text:PDF(723.7KB)

Method of Spread Spectrum Watermarking Using Quantization Index Modulation for Cropped Images
Takahiro YAMAMOTO Masaki KAWAMURA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2015/07/01
Vol. E98-D  No. 7  pp. 1306-1315
Type of Manuscript:  PAPER
Category: Data Engineering, Web Information Systems
Keyword: 
digital watermarkingspread spectrum techniquequantization index modulationcroppingJPEG compression
 Summary | Full Text:PDF(620.3KB)