Takayuki HAMAMOTO


Sensor-Pattern-Noise Map Reconstruction in Source Camera Identification for Size-Reduced Images
Joji WATANABE Tadaaki HOSAKA Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2013/08/01
Vol. E96-D  No. 8  pp. 1882-1885
Type of Manuscript:  LETTER
Category: Pattern Recognition
Keyword: 
digital forensicssource camera identificationsensor pattern noisesize-reduced imagereconstruction
 Summary | Full Text:PDF

High-Accuracy Motion Estimation by Variable Gradient Method Using High Frame-Rate Images
Hiroshi KATAYAMA Danya SUGAI Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/08/01
Vol. E95-A  No. 8  pp. 1302-1305
Type of Manuscript:  Special Section LETTER (Special Section on Image Media Quality)
Category: Coding & Processing
Keyword: 
motion-estimationsub-pixelgradient-methodsuper-resolution
 Summary | Full Text:PDF

Image Quality Enhancement for Single-Image Super Resolution Based on Local Similarities and Support Vector Regression
Atsushi YAGUCHI Tadaaki HOSAKA Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/02/01
Vol. E94-A  No. 2  pp. 552-554
Type of Manuscript:  Special Section LETTER (Special Section on Image Media Quality)
Category: Processing
Keyword: 
super resolutionlocal similaritysupport vector regression (SVR)total variation (TV)
 Summary | Full Text:PDF

Objective Evaluation of Components of Colour Distortions due to Image Compression
Amal PUNCHIHEWA Jonathan ARMSTRONG Seiichiro HANGAI Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/12/01
Vol. E92-A  No. 12  pp. 3307-3312
Type of Manuscript:  Special Section PAPER (Special Section on Image Media Quality)
Category: Evaluation
Keyword: 
colour blurcolour ringingimage compressioncolour distortionsobjective evaluation
 Summary | Full Text:PDF

Wide Dynamic Range Image Sensor with Polygonal-Line I/O Characteristic Adapted to Brightness Distribution of Objects
Satoko KAGAMI Fumitsugu SUZUKI Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/09/01
Vol. E91-C  No. 9  pp. 1402-1408
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Processors Based on Novel Concepts in Computation)
Category: 
Keyword: 
smart image sensorwide dynamic range imagingdynamic range compressionvariable integration timecontrast enhancement
 Summary | Full Text:PDF

Wide View Imaging System Using Eight Random Access Image Sensors
Kenji IDE Ryusuke KAWAHARA Satoshi SHIMIZU Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/10/01
Vol. E90-C  No. 10  pp. 1884-1891
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Technology toward Frontiers of New Market)
Category: Image Sensor/Vision Chip
Keyword: 
smart image sensorwide view imagingobject trackingFPGAbackground subtraction
 Summary | Full Text:PDF

Image Acquisition by Pixel-Based Random-Access Image Sensor for a Real-Time IBR System
Ryutaro OI Takayuki HAMAMOTO Kiyoharu AIZAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/03/01
Vol. E85-C  No. 3  pp. 505-510
Type of Manuscript:  Special Section PAPER (Special Issue on Signals, Systems and Electronics Technology)
Category: Signal Processing
Keyword: 
image based renderingCMOS image sensorlight-field renderingsmart sensorcamera array
 Summary | Full Text:PDF

A New Image Sensor with Space Variant Sampling Control on a Focal Plane
Yasuhiro OHTSUKA Takayuki HAMAMOTO Kiyoharu AIZAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2000/07/25
Vol. E83-D  No. 7  pp. 1331-1337
Type of Manuscript:  Special Section PAPER (Special Issue on Machine Vision Applications)
Category: 
Keyword: 
spatially variant samplingsampling position memoryimage sensorsmart scanning
 Summary | Full Text:PDF