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IEICE Trans

Takayuki HAMAMOTO

Unified Physiological and Illumination Modeling for Heart Rate Estimation Using Dynamic Mode Decomposition and RGB/NIR Sensor
Kosuke KURIHARA Yoshihiro MAEDA Daisuke SUGIMURA Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2026/01/01
Vol. E109-D  No. 1  pp. 95-106
Type of Manuscript:  Special Section PAPER (Special Section on Picture Coding and Image Media Processing)
Category: 
Keyword: 
non-contact heart rate estimation, blood volume pulse, dynamic mode decomposition, varying illumination, RGB/NIR camera, 
 Summary | Full Text:PDF
CMOS Image Sensor with Pixel-Parallel ADC and HDR Reconstruction from Intermediate Exposure Images
Shinnosuke KURATA Toshinori OTAKA Yusuke KAMEDA Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2022/01/01
Vol. E105-A  No. 1  pp. 82-86
Type of Manuscript:  LETTER
Category: Image
Keyword: 
pixel-parallel ADC, high dynamic range reconstruction, intermediate exposure image, image sensor, non-destructively reading out, 
 Summary | Full Text:PDF
Scene Adaptive Exposure Time Control for Imaging and Apparent Motion Sensor
Misaki SHIKAKURA Yusuke KAMEDA Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2021/06/01
Vol. E104-A  No. 6  pp. 907-911
Type of Manuscript:  Special Section LETTER (Special Section on Image Media Quality)
Category: 
Keyword: 
image sensor, exposure time control, apparent motion sensor, moving object, 
 Summary | Full Text:PDF
HDR Imaging Based on Image Interpolation and Motion Blur Suppression in Multiple-Exposure-Time Image Sensor
Masahito SHIMAMOTO Yusuke KAMEDA Takayuki HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2020/10/01
Vol. E103-D  No. 10  pp. 2067-2071
Type of Manuscript:  Special Section LETTER (Special Section on Picture Coding and Image Media Processing)
Category: 
Keyword: 
multiple-exposure-times imaging, HDR imaging, motion blur, overexposure, image interpolation, 
 Summary | Full Text:PDF
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 forensics, source camera identification, sensor pattern noise, size-reduced image, reconstruction, 
 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-estimation, sub-pixel, gradient-method, super-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 resolution, local similarity, support 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 blur, colour ringing, image compression, colour distortions, objective 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 sensor, wide dynamic range imaging, dynamic range compression, variable integration time, contrast 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 sensor, wide view imaging, object tracking, FPGA, background 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 rendering, CMOS image sensor, light-field rendering, smart sensor, camera 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 sampling, sampling position memory, image sensor, smart scanning, 
 Summary | Full Text:PDF