Koichi ITO


A Liveness Detection Method Using Convolutional Neural Network
Koichi ITO Takehisa OKANO Takafumi AOKI 
Publication:   - - Abstracts of (Japanese Edition)
Publication Date: 2017/12/01
Vol. J100-A  No. 12  pp. 455-464
Type of Manuscript:  Special Section PAPER (Special Section on Biometrics)
Category: 
Keyword: 
spoofingliveness detectionconvolutional neural networkface recognitionbiometricssecurity
 Summary | Full Text(in Japanese):PDF(2.7MB)

SAR Evaluation of Patient with Carotid Stent during MR Imaging
Mahito KOIZUMI Ryotaro SUGA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2015/06/01
Vol. J98-B  No. 6  pp. 517-525
Type of Manuscript:  PAPER
Category: 
Keyword: 
Specific Absorption Rate (SAR)Magnetic Resonance Imaging (MRI)carotid stentFD-TD method
 Summary | Full Text(in Japanese):PDF(1.7MB)

Obstacle Detection Method for In-Vehicle Narrow-Baseline Stereo Camera
Keisuke IZUMI Mamoru MIURA Koichi ITO Takafumi AOKI 
Publication:   A - Abstracts of IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences (Japanese Edition)
Publication Date: 2015/01/01
Vol. J98-A  No. 1  pp. 165-175
Type of Manuscript:  PAPER
Category: 
Keyword: 
automotive driver assistance systemobstacle detectionstereo visionphase-only correlationdisparity clustering
 Summary | Full Text(in Japanese):PDF(3MB)

Impact Evaluation from Temperature Dependent of Tissue-Equivalent Phantom to Input Impedance of Antenna for Body-Centric Wireless Communications
Mizuki INOUE Ryotaro SUGA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2014/07/01
Vol. J97-B  No. 7  pp. 574-577
Type of Manuscript:  LETTER
Category: 
Keyword: 
tissue-equivalent phantomtemperature variationelectrical propertiesantenna input impedance
 Summary | Full Text(in Japanese):PDF(678.6KB)

Development of Coagulation Device for Biological Tissue using Microwave Energy
Mizuki INOUE Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   C - Abstracts of IEICE TRANSACTIONS on Electronics (Japanese Edition)
Publication Date: 2014/05/01
Vol. J97-C  No. 5  pp. 218-224
Type of Manuscript:  PAPER
Category: 
Keyword: 
microwavetissue coagulationhemostasisFDTD calculation
 Summary | Full Text(in Japanese):PDF(1MB)

SAR Evaluation of Leg with Artificial Knee Joint during MR Imaging
Ryotaro SUGA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2014/04/01
Vol. J97-B  No. 4  pp. 354-362
Type of Manuscript:  PAPER
Category: 
Keyword: 
specific absorption rate (SAR)Magnetic Resonance Imaging (MRI)artificial knee jointfinite-difference time-domain (FDTD) method
 Summary | Full Text(in Japanese):PDF(1.9MB)

Compensation Techniques for Thermal Diffusion in the SAR Measurement by the Thermographic Method
Kazuyuki SAITO Takuya TAKIMOTO Teruo ONISHI Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2014/03/01
Vol. J97-B  No. 3  pp. 294-300
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Photonics-applied Electromagnetic Measurement)
Category: 
Keyword: 
solid phantomthermographic methodSAR measurementthermal diffusioncompensation techniques
 Summary | Full Text(in Japanese):PDF(1.2MB)

Development of Urination Detection System Using RFID Technology
Hiromasa NAKAJIMA Masaharu TAKAHASHI Kazuyuki SAITO Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2013/12/01
Vol. J96-B  No. 12  pp. 1378-1385
Type of Manuscript:  PAPER
Category: 
Keyword: 
antennaRFID systemurinationpaper diaper
 Summary | Full Text(in Japanese):PDF(1.5MB)

A Finger-Knuckle-Print Recognition Algorithm Robust against Deformation of Finger-Knuckle-Print Images
Shoichiro AOYAMA Koichi ITO Takafumi AOKI 
Publication:   A - Abstracts of IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences (Japanese Edition)
Publication Date: 2013/12/01
Vol. J96-A  No. 12  pp. 790-800
Type of Manuscript:  Special Section PAPER (Special Issue on Biometrics)
Category: 
Keyword: 
finger-knuckle-printbiometricsphase-only correlationlocal block matching
 Summary | Full Text(in Japanese):PDF(1.4MB)

Development of Biological Tissue-Equivalent Phantom in HF Band
Ryotaro SUGA Mizuki INOUE Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2013/09/01
Vol. J96-B  No. 9  pp. 964-970
Type of Manuscript:  Special Section PAPER (Special Issue on Antennas and Propagation Technologies Supporting Fusions of Wireless Systems)
Category: 
Keyword: 
biological tissue-equivalent phantomrelative permittivityconductivityimpedance analyzer
 Summary | Full Text(in Japanese):PDF(1.1MB)

A Contactless Palmprint Authentication Algorithm for Mobile Phones
Shoichiro AOYAMA Koichi ITO Takafumi AOKI Haruki OTA 
Publication:   A - Abstracts of IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences (Japanese Edition)
Publication Date: 2013/05/01
Vol. J96-A  No. 5  pp. 250-263
Type of Manuscript:  PAPER
Category: 
Keyword: 
palmprint authenticationuser authenticationmobile phonebiometricsphase-only correlation
 Summary | Full Text(in Japanese):PDF(1.5MB)

A High-Accuracy Stereo Correspondence Matching Method Robust against Baseline Length
Shuji SAKAI Koichi ITO Takafumi AOKI Hiroki UNTEN 
Publication:   D - Abstracts of IEICE TRANSACTIONS on Information and Systems (Japanese Edition)
Publication Date: 2012/08/01
Vol. J95-D  No. 8  pp. 1609-1622
Type of Manuscript:  Special Section PAPER (Special Section on Image Recognition and Understanding)
Category: 
Keyword: 
stereo visionstereo correspondence3D measurementScaled Window Matchingphase-only correlation
 Summary | Full Text(in Japanese):PDF(4.3MB)

Effects of Posture and Earth Ground on Intra-Body Communication Channels Using Quasi-Static Field
Nozomi HAGA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2012/02/01
Vol. J95-B  No. 2  pp. 257-264
Type of Manuscript:  Special Section PAPER (Special Issue on Student Research for Future Communication Technology)
Category: 
Keyword: 
intra-body communicationsquasi-static approximationpostureearth groundequivalent circuit
 Summary | Full Text(in Japanese):PDF(942.3KB)

Development on Flexible Electromagnetic Hand Phantom
Takumi HIRAOKA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2011/02/01
Vol. J94-B  No. 2  pp. 292-296
Type of Manuscript:  Special Section LETTER (Special Issue on Student Research Building the Future of Communication Technology)
Category: 
Keyword: 
phantommobile phoneplanner inverted F antennahuman hand
 Summary | Full Text(in Japanese):PDF(907KB)

Development of Dynamic Phantom for Evaluation of Doppler Radar for Breath Detection
Jumpei YONEBAYASHI Shozo TAKAMATSU Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2011/02/01
Vol. J94-B  No. 2  pp. 297-299
Type of Manuscript:  Special Section LETTER (Special Issue on Student Research Building the Future of Communication Technology)
Category: 
Keyword: 
dynamic phantombiological tissue - equivalent phantomDoppler radarbreath detectionbiometry
 Summary | Full Text(in Japanese):PDF(670.3KB)

A Calibration Technique for Multi-Projector Display Based on High-Accuracy Image Correspondence Using SIFT and Phase-Only Correlation
Toru TAKAHASHI Tatsuya KAWANO Koichi ITO Takafumi AOKI Satoshi KONDO 
Publication:   A - Abstracts of IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences (Japanese Edition)
Publication Date: 2011/02/01
Vol. J94-A  No. 2  pp. 73-84
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Technologies in Electronics, Information and Communication Engineering)
Category: 
Keyword: 
multi-projector display3D displayprojector-camera systemSIFTphase-only correlation
 Summary | Full Text(in Japanese):PDF(971KB)

Characteristics of Antenna on Cardiac Pacemaker Embedded in Multilayered Models
Masaharu TAKAHASHI Satoshi NAKATA Kazuyuki SAITO Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2010/12/01
Vol. J93-B  No. 12  pp. 1636-1643
Type of Manuscript:  PAPER
Category: 
Keyword: 
implantable antennaPIFAcardiac pacemakerMICS bandFDTD method
 Summary | Full Text(in Japanese):PDF(1.1MB)

Proposition of Improved Birdcage Coil for MRI System with No Lumped Circuit Elements
Kazuyuki SAITO Takahiro KAWAMURA Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2010/12/01
Vol. J93-B  No. 12  pp. 1644-1650
Type of Manuscript:  PAPER
Category: 
Keyword: 
MRIRF coilbirdcage coilmagnetic field distributionFDTD calculation
 Summary | Full Text(in Japanese):PDF(1.6MB)

Estimation of SAR and Magnetic-Field Uniformity Inside a Human Body Inserted in Birdcage Coil for MRI System
Satoru KIKUCHI Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2010/02/01
Vol. J93-B  No. 2  pp. 294-302
Type of Manuscript:  Special Section PAPER (Special Issue on Student Research Contributing to Future Communication Technology)
Category: 
Keyword: 
magnetic resonance imaging (MRI)birdcage coilfinite difference time domain (FDTD) methodspecific absorption rate (SAR) distributionmagnetic-field distribution
 Summary | Full Text(in Japanese):PDF(1.6MB)

Evaluation on Characteristics of Wristband Type RFID Antenna
Takashi NAKAJIMA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2010/02/01
Vol. J93-B  No. 2  pp. 286-293
Type of Manuscript:  Special Section PAPER (Special Issue on Student Research Contributing to Future Communication Technology)
Category: 
Keyword: 
RFIDwristbandbioligical tissue-equvalent solid phantomreflectorradiation pattern
 Summary | Full Text(in Japanese):PDF(1.1MB)

Evaluation of Antenna Characteristics Dependent on Human Body Structure at 2 10 GHz
Yumiko UNO Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2010/02/01
Vol. J93-B  No. 2  pp. 278-285
Type of Manuscript:  Special Section PAPER (Special Issue on Student Research Contributing to Future Communication Technology)
Category: 
Keyword: 
biological tissue equivalent phantomnear fieldantenna characteristicFDTD method
 Summary | Full Text(in Japanese):PDF(1.7MB)

A Basic Investigation on the SAR Characteristics of Planar Slot Antennas Close to a Human Body
Shoichi KAJIWARA Koichi OGAWA Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2009/09/01
Vol. J92-B  No. 9  pp. 1464-1468
Type of Manuscript:  Special Section PAPER (Special Issue on Simulation and Analysis Methods for Antennas and Propagation Technologies)
Category: 
Keyword: 
slot antennadipole antennaSARBANphantom
 Summary | Full Text(in Japanese):PDF(775.1KB)

An Implantable Antenna Designed for Loading onto a Cardiac Pacemaker
Satoshi NATAKA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2009/09/01
Vol. J92-B  No. 9  pp. 1407-1415
Type of Manuscript:  Special Section PAPER (Special Issue on Simulation and Analysis Methods for Antennas and Propagation Technologies)
Category: 
Keyword: 
cardiac pacemakerimplantable antennaPIFAFDTD method
 Summary | Full Text(in Japanese):PDF(1.3MB)

Super-Resolution De-Interlacing Using Phase-Only Correlation
Norihito NUMA Koichi ITO Takafumi AOKI Satoshi KONDO 
Publication:   A - Abstracts of IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences (Japanese Edition)
Publication Date: 2009/08/01
Vol. J92-A  No. 8  pp. 529-539
Type of Manuscript:  PAPER
Category: 
Keyword: 
de-interlacingsuper-resolutionmotion estimationphase-only correlation
 Summary | Full Text(in Japanese):PDF(854.9KB)

Calculations of SAR in Abdomen Using Numerical Human Model by Normal Mode Helical Antenna at 150 MHz
Shimpei AKIMOTO Satoru KIKUCHI Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2009/01/01
Vol. J92-B  No. 1  pp. 304-311
Type of Manuscript:  Special Section PAPER (Special Issue on Student Research for Future Communication Technology)
Category: 
Keyword: 
commercial wireless terminalnormal mode helical antennanumerical human modelSAR
 Summary | Full Text(in Japanese):PDF(1.8MB)

Characteristics of Folded Type Rectangular Loop Antenna in UHF Band
Naoto KOGO Susumu NAKAZAWA Toru IWASAKI Shoji TANAKA Kazuyoshi SHOGEN Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2009/01/01
Vol. J92-B  No. 1  pp. 271-279
Type of Manuscript:  Special Section PAPER (Special Issue on Student Research for Future Communication Technology)
Category: 
Keyword: 
UHF bandloop antennaresonant frequencysmall antennafolded type
 Summary | Full Text(in Japanese):PDF(812.8KB)

A High-Accuracy Image Registration Algorithm Using Phase-Only Correlation for Dental Radiographs
Koichi ITO Akira NIKAIDO Takafumi AOKI Eiko KOSUGE Ryota KAWAMATA Isamu KASHIMA 
Publication:   D - Abstracts of IEICE TRANSACTIONS on Information and Systems (Japanese Edition)
Publication Date: 2008/07/01
Vol. J91-D  No. 7  pp. 1788-1797
Type of Manuscript:  Special Section PAPER (Special Section on Medical Imaging)
Category: 
Keyword: 
image registrationdental radiographphase-only correlationthin-plate spline
 Summary | Full Text(in Japanese):PDF(1.8MB)

Circularly Polarized Patch Antennas Combining Different Shaped Linealy Polarized Elements
Takanori NORO Yasuhiro KAZAMA Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2008/05/01
Vol. J91-B  No. 5  pp. 595-604
Type of Manuscript:  PAPER
Category: 
Keyword: 
mobile satellite communicationspatch antennascircularly polarizationone-point feedwide bandwidth
 Summary | Full Text(in Japanese):PDF(1.1MB)

Development on Phantom for Measurement of Temperature Rises Inside Biological Tissue by Electromagnetic Waves Exposure
Atsushi HIROE Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2007/11/01
Vol. J90-B  No. 11  pp. 1187-1192
Type of Manuscript:  Special Section PAPER (Special Section on Broadband EMC Technologies)
Category: 
Keyword: 
phantomblood flowtemperature risecoaxial-slot antenna
 Summary | Full Text(in Japanese):PDF(631KB)

Development of a Tissue-Equivalent Solid Phantom for UWB Band and Its Application to the Evaluation of the Interaction between Radio Terminals and the Human Body
Koichi ITO Masaharu TAKAHASHI Kazuyuki SAITO 
Publication:   C - Abstracts of IEICE TRANSACTIONS on Electronics (Japanese Edition)
Publication Date: 2007/03/01
Vol. J90-C  No. 3  pp. 208-215
Type of Manuscript:  Special Section PAPER (Secial Issue on Microwave and Millimeter-Wave Materials for Wireless Communications and Related Technologies)
Category: 
Keyword: 
UWBtissue-equivalent solid phantom for UWB systemsradiation patternsFDTD method
 Summary | Full Text(in Japanese):PDF(525.2KB)

Demonstration Experiment of a Simple Satellite Tracking System
Toshimitsu TANAKA Tamotsu HOUZEN Kenichi KANEKO Shin-ichi YAMAMOTO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2007/01/01
Vol. J90-B  No. 1  pp. 106-109
Type of Manuscript:  LETTER
Category: 
Keyword: 
mobile satellite communicationssatellite trackingpatch array antennabeam switching
 Summary | Full Text(in Japanese):PDF(639.8KB)

Heating Performances of a Coaxial-Slot Antenna for Thermal Treatment of Bile Duct Carcinoma -- Experimental Estimation of Cooling Effect due to a Thick Blood Vessel --
Atsushi HIROE Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2006/12/01
Vol. J89-B  No. 12  pp. 2271-2274
Type of Manuscript:  LETTER
Category: 
Keyword: 
bile duct carcinomacooling effect of a blood flowcoaxial-slot antennatissue-equivalent solid phantomtemperature distribution
 Summary | Full Text(in Japanese):PDF(603.5KB)

Antenna Technology Applied to Medicine
Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2006/09/01
Vol. J89-B  No. 9  pp. 1558-1568
Type of Manuscript:  Special Section PAPER (Special Issue on Design, Analysis and Measurement Techniques in Antennas and Propagation to Meet Expanding Applications of Radio Systems)
Category: 
Keyword: 
medical applicationMRIhyperthermiacoaxial-slot antenna
 Summary | Full Text(in Japanese):PDF(1.5MB)

Evaluation on Effectiveness of the Biological Tissue Equivalent Solid Phantom for UWB Communications
Takuya TAKIMOTO Teruo ONISHI Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2006/09/01
Vol. J89-B  No. 9  pp. 1806-1814
Type of Manuscript:  Special Section PAPER (Special Issue on Design, Analysis and Measurement Techniques in Antennas and Propagation to Meet Expanding Applications of Radio Systems)
Category: 
Keyword: 
UWBtissue-equivalent solid phantom for UWB communicationstime domain measurementFD-TD method
 Summary | Full Text(in Japanese):PDF(2.8MB)

Electronic Scanning Characteristics of a Simple Satellite-Tracking Array Antenna
Kenichi KANEKO Toshimitsu TANAKA Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2006/09/01
Vol. J89-B  No. 9  pp. 1696-1704
Type of Manuscript:  Special Section PAPER (Special Issue on Design, Analysis and Measurement Techniques in Antennas and Propagation to Meet Expanding Applications of Radio Systems)
Category: 
Keyword: 
switching circuitpatch array antennaETS-VIIIbeam switchingmobile satellite communications
 Summary | Full Text(in Japanese):PDF(2MB)

Control of Heating Pattern for Interstitial Microwave Hyperthermia by a Coaxial-Dipole Antenna--Aiming at Treatment of Brain Tumor--
Satoru KIKUCHI Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2006/08/01
Vol. J89-B  No. 8  pp. 1486-1492
Type of Manuscript:  PAPER
Category: 
Keyword: 
coaxial-dipole antennaMR imagebrain tumorSAR distributiontemperature distribution
 Summary | Full Text(in Japanese):PDF(702.2KB)