Hiroshi OGAWA


Digital Watermarking Technique for Motion Pictures Based on Quantization
Hiroshi OGAWA Takao NAKAMURA Atsuki TOMIOKA Youichi TAKASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/25
Vol. E83-A  No. 1  pp. 77-89
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
motion picture watermarkingadaptive quantizationreliabilitysoft decisionMPEG
 Summary | Full Text:PDF

Improved Digital Watermark Robustness against Translation and/or Cropping of an Image Area
Takao NAKAMURA Hiroshi OGAWA Atsuki TOMIOKA Youichi TAKASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/25
Vol. E83-A  No. 1  pp. 68-76
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
digital watermarkimage processingorthogonal transformspread spectrumcopyright protection
 Summary | Full Text:PDF

Weibull-Distributed Radar Clutter Reflected From Sea Ice
Hiroshi OGAWA Matsuo SEKINE Toshimitsu MUSHA Masaaki AOTA Masayuki OHI Hiroki FUKUSHI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1987/02/25
Vol. E70-E  No. 2  pp. 116-120
Type of Manuscript:  PAPER
Category: Radio Wave Applications
Keyword: 
 Summary | Full Text:PDF

The Periodic Magnetic Field Soft-Landing Collector and Its Application to a TWT
Takanori OKOSHI Hiroshi OGAWA Seiko KITAZAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1976/06/25
Vol. E59-E  No. 6  pp. 14-20
Type of Manuscript:  PAPER
Category: Electron Devices
Keyword: 
 Summary | Full Text:PDF