Keiichiro Kagawa

Publication Activity (10 Years)

Years Active: 1999-2023
Publications (10 Years): 40

Top Topics

Biomedical Imaging

Top Venues

IEEE J. Solid State Circuits

Publications

Alvaro Lopez Paredes, Miguel Heredia Conde, Thoriq Ibrahim, Anh Ngoc Pham, Keiichiro Kagawa
Spatio-Temporal Super-Resolution for CS-Based ToF 3D Imaging. EUSIPCO (2023)
Ryosuke Miyazawa, Yuya Shirakawa, Kamel Mars, Keita Yasutomi, Keiichiro Kagawa, Satoshi Aoyama, Shoji Kawahito
A Time-of-Flight Image Sensor Using 8-Tap P-N Junction Demodulator Pixels. Sensors 23 (8) (2023)
Anh Ngoc Pham, Thoriq Ibrahim, Keita Yasutomi, Shoji Kawahito, Hajime Nagahara, Keiichiro Kagawa
Depth Quality Improvement with a 607 MHz Time-Compressive Computational Pseudo-dToF CMOS Image Sensor. Sensors 23 (23) (2023)
Keiichiro Kagawa, Masaya Horio, Anh Ngoc Pham, Thoriq Ibrahim, Shin-ichiro Okihara, Tatsuki Furuhashi, Taishi Takasawa, Keita Yasutomi, Shoji Kawahito, Hajime Nagahara
A Dual-Mode 303-Megaframes-per-Second Charge-Domain Time-Compressive Computational CMOS Image Sensor. Sensors 22 (5) (2022)
Keiichiro Kagawa
Computational ultrafast CMOS image sensors. OECC/PSC (2022)
Masaya Horio, Yu Feng, Tomoya Kokado, Taishi Takasawa, Keita Yasutomi, Shoji Kawahito, Takashi Komuro, Hajime Nagahara, Keiichiro Kagawa
Resolving Multi-Path Interference in Compressive Time-of-Flight Depth Imaging with a Multi-Tap Macro-Pixel Computational CMOS Image Sensor. Sensors 22 (7) (2022)
Keita Yasutomi, Tatsuki Furuhashi, Koki Sagawa, Taishi Takasawa, Keiichiro Kagawa, Shoji Kawahito
A 38µm Range Precision Time-of-Flight CMOS Range Line Imager with Gating Driver Jitter Reduction Using Charge-Injection Pseudo Photocurrent Reference. ISSCC (2022)
Juyeong Kim, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
High-Linearity High-Resolution Time-of-Flight Linear-Array Digital Image Sensor Using Time-Domain Feedback. Sensors 21 (2) (2021)
Kazuki Kobayashi, Takashi Komuro, Keiichiro Kagawa, Shoji Kawahito
Transmission of correct gaze direction in video conferencing using screen-embedded cameras. Multim. Tools Appl. 80 (21) (2021)
Kazuki Kobayashi, Takashi Komuro, Keiichiro Kagawa, Shoji Kawahito
Correction to: Transmission of correct gaze direction in video conferencing using screen-embedded cameras. Multim. Tools Appl. 80 (21) (2021)
Yuya Shirakawa, Keita Yasutomi, Keiichiro Kagawa, Satoshi Aoyama, Shoji Kawahito
An 8-Tap CMOS Lock-In Pixel Image Sensor for Short-Pulse Time-of-Flight Measurements. Sensors 20 (4) (2020)
Yoshio Matsuda, Takashi Komuro, Takuya Yoda, Hajime Nagahara, Shoji Kawahito, Keiichiro Kagawa
Palm-Controlled Pointing Interface Using a Dynamic Photometric Stereo Camera. HCI (48) (2020)
Miguel Heredia Conde, Keiichiro Kagawa, Tomoya Kokado, Shoji Kawahito, Otmar Loffeld
Single-Shot Real-Time Multiple-Path Time-of-Flight Depth Imaging for Multi-Aperture and Macro-Pixel Sensors. ICASSP (2020)
Atsutaka Miyamichi, Atsushi Ono, Keiichiro Kagawa, Keita Yasutomi, Shoji Kawahito
Plasmonic Color Filter Array with High Color Purity for CMOS Image Sensors. Sensors 19 (8) (2019)
Minho Lee, Min-Woong Seo, Juyeong Kim, Keita Yasutomi, Keiichiro Kagawa, Jang-Kyoo Shin, Shoji Kawahito
A Wide Dynamic Range CMOS Image Sensor with a Charge Splitting Gate and Two Storage Diodes. Sensors 19 (13) (2019)
Chen Cao, Yuya Shirakawa, Leyi Tan, Min-Woong Seo, Keiichiro Kagawa, Keita Yasutomi, Sung-Wook Jun, Tomohiko Kosugi, Satoshi Aoyama, Nobukazu Teranishi, Norimichi Tsumura, Shoji Kawahito
A Time-Resolved NIR Lock-In Pixel CMOS Image Sensor With Background Cancelling Capability for Remote Heart Rate Detection. IEEE J. Solid State Circuits 54 (4) (2019)
Tomoya Nakamura, Keiichiro Kagawa, Shiho Torashima, Masahiro Yamaguchi
Super Field-of-View Lensless Camera by Coded Image Sensors. Sensors 19 (6) (2019)
Genki Okada, Ryota Mitsuhashi, Keiichiro Kagawa, Shoji Kawahito, Norimichi Tsumura
Noncontact heart rate measurement using a high-sensitivity camera in a low-light environment. Artif. Life Robotics 24 (1) (2019)
Keita Yasutomi, Yushi Okura, Keiichiro Kagawa, Shoji Kawahito
A Sub-100 $\mu$ m-Range-Resolution Time-of-Flight Range Image Sensor With Three-Tap Lock-In Pixels, Non-Overlapping Gate Clock, and Reference Plane Sampling. IEEE J. Solid State Circuits 54 (8) (2019)
Min-Woong Seo, Yuya Shirakawa, Yoshimasa Kawata, Keiichiro Kagawa, Keita Yasutomi, Shoji Kawahito
A Time-Resolved Four-Tap Lock-In Pixel CMOS Image Sensor for Real-Time Fluorescence Lifetime Imaging Microscopy. IEEE J. Solid State Circuits 53 (8) (2018)
Ryota Mitsuhashi, Genki Okada, Koki Kurita, Keiichiro Kagawa, Shoji Kawahito, Chawan Koopipat, Norimichi Tsumura
Noncontact pulse wave detection by two-band infrared video-based measurement on face without visible lighting. Artif. Life Robotics 23 (3) (2018)
Kohei Yamada, Komazawa Akihito, Taishi Takasawa, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
A Distance Measurement Method Using A Time-of-Flight CMOS Range Image Sensor with 4-Tap Output Pixels and Multiple Time-Windows. IMSE (2018)
Ryota Mitsuhashi, Keiichiro Kagawa, Shoji Kawahito, Chawan Koopipat, Norimichi Tsumura
Dual-Band Infrared Video-Based Measurement Using Pulse Wave Maps to Analyze Heart Rate Variability. CIC (2018)
Chen Cao, Yuya Shirakawa, Leyi Tan, Min-Woong Seo, Keiichiro Kagawa, Keita Yasutomi, Tomohiko Kosugi, Satoshi Aoyama, Nobukazu Teranishi, Norimichi Tsumura, Shoji Kawahito
A Two-Tap NIR Lock-in Pixel CMOS Image Sensor with Background Light Cancelling Capability for Non-Contact Heart Rate Detection. VLSI Circuits (2018)
Takuya Yoda, Hajime Nagahara, Rin-Ichiro Taniguchi, Keiichiro Kagawa, Keita Yasutomi, Shoji Kawahito
The Dynamic Photometric Stereo Method Using a Multi-Tap CMOS Image Sensor. Sensors 18 (3) (2018)
Sumeet Shrestha, Shoji Kawahito, Hiroki Kamehama, Syunta Nakanishi, Keita Yasutomi, Keiichiro Kagawa, Nobukazu Teranishi, Ayaki Takeda, Takeshi Go Tsuru, Ikuo Kurachi, Yasuo Arai
A Silicon-on-Insulator-Based Dual-Gain Charge-Sensitive Pixel Detector for Low-Noise X-ray Imaging for Future Astronomical Satellite Missions. Sensors 18 (6) (2018)
Haruki Ishida, Keiichiro Kagawa, Takashi Komuro, Bo Zhang, Min-Woong Seo, Taishi Takasawa, Keita Yasutomi, Shoji Kawahito
Multi-Aperture-Based Probabilistic Noise Reduction of Random Telegraph Signal Noise and Photon Shot Noise in Semi-Photon-Counting Complementary-Metal-Oxide-Semiconductor Image Sensor. Sensors 18 (4) (2018)
Genki Okada, Keiichiro Kagawa, Shoji Kawahito, Norimichi Tsumura
Noncontact heart rate measurement using high sensitivity camera in low light environment. CIC (2017)
Kazuki Kobayashi, Takashi Komuro, Bo Zhang, Keiichiro Kagawa, Shoji Kawahito
A gaze-preserving group video conference system using screen-embedded cameras. VRST (2017)
Min-Woong Seo, Yuya Shirakawa, Yuriko Masuda, Yoshimasa Kawata, Keiichiro Kagawa, Keita Yasutomi, Shoji Kawahito
4.3 A programmable sub-nanosecond time-gated 4-tap lock-in pixel CMOS image sensor for real-time fluorescence lifetime imaging microscopy. ISSCC (2017)
Yuki Morikawa, Keita Yasutomi, Shoma Imanishi, Taishi Takasawa, Keiichiro Kagawa, Nobukazu Teranishi, Shoji Kawahito
A Lateral Electric Field charge Modulator with Bipolar-gates for Time-resolved Imaging. IMSE (2017)
Kamel Mars, Lioe De Xing, Shoji Kawahito, Keita Yasutomi, Keiichiro Kagawa, Takahiro Yamada, Mamoru Hashimoto
Label-Free Biomedical Imaging Using High-Speed Lock-In Pixel Sensor for Stimulated Raman Scattering. Sensors 17 (11) (2017)
Haruki Ishida, Keiichiro Kagawa, Min-Woong Seo, Takashi Komuro, Bo Zhang, Taishi Takasawa, Keita Yasutomi, Shoji Kawahito
RTS and photon shot noise reduction based on maximum likelihood estimate with multi-aperture optics and semi-photon-counting-level CMOS image sensors. IMSE (2017)
Ryota Mitsuhashi, Genki Okada, Koki Kurita, Keiichiro Kagawa, Shoji Kawahito, Chawan Koopipat, Norimichi Tsumura
Two-Band Infrared Video-Based Measurement for Non-Contact Pulse Wave Detection on Face without Visible Lighting. CIC (2017)
Takuya Yoda, Hajime Nagahara, Rin-Ichiro Taniguchi, Keiichiro Kagawa, Keita Yasutomi, Shoji Kawahito
Dynamic photometric stereo method using multi-tap CMOS image sensor. ICPR (2016)
Min-Woong Seo, Keiichiro Kagawa, Keita Yasutomi, Yoshimasa Kawata, Nobukazu Teranishi, Zhuo Li, Izhal Abdul Halin, Shoji Kawahito
A 10 ps Time-Resolution CMOS Image Sensor With Two-Tap True-CDS Lock-In Pixels for Fluorescence Lifetime Imaging. IEEE J. Solid State Circuits 51 (1) (2016)
Taichi Kasigao, Sang-Man Han, Hanh Trang, Taishi Takasawa, Satoshi Aoyama, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
A Time-of-Flight CMOS Range Image Sensor Using 4-Tap Output Pixels with Lateral-Electric-Field Control. IMSE (2016)
Min-Woong Seo, Yuya Shirakawa, Keiichiro Kagawa, Keita Yasutomi, Yoshimasa Kawata, Nobukazu Teranishi, Shoji Kawahito
A high time-resolution two-tap CMOS lock-in pixel image sensor for time-resolved measurements and its applications. BioCAS (2016)
Hanh Trang, Taichi Kasugai, Keigo Isobe, Sang-Man Han, Taichi Takasawa, Xing Lioe De, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
Design, implementation and evaluation of a TOF range image sensor using multi-tap lock-in pixels with cascaded charge draining and modulating gates. IMSE (2016)
Lioe De Xing, Kamel Mars, Shoji Kawahito, Keita Yasutomi, Keiichiro Kagawa, Takahiro Yamada, Mamoru Hashimoto
A Stimulated Raman Scattering CMOS Pixel Using a High-Speed Charge Modulator and Lock-in Amplifier. Sensors 16 (4) (2016)
Min-Woong Seo, Keiichiro Kagawa, Keita Yasutomi, Taishi Takasawa, Yoshimasa Kawata, Nobukazu Teranishi, Zhuo Li, Izhal Abdul Halin, Shoji Kawahito
11.2 A 10.8ps-time-resolution 256×512 image sensor with 2-Tap true-CDS lock-in pixels for fluorescence lifetime imaging. ISSCC (2015)
Futa Mochizuki, Keiichiro Kagawa, Shin-ichiro Okihara, Min-Woong Seo, Bo Zhang, Taishi Takasawa, Keita Yasutomi, Shoji Kawahito
6.4 Single-shot 200Mfps 5×3-aperture compressive CMOS imager. ISSCC (2015)
Bo Zhang, Keiichiro Kagawa, Taishi Takasawa, Min-Woong Seo, Keita Yasutomi, Shoji Kawahito
A high-sensitivity 2x2 multi-aperture color camera based on selective averaging. IMSE (2015)
Masashi Ozaki, Keiichiro Kagawa, Hidenobu Arimoto, Yoko Kominami, Yoji Sanomura, Shigeto Yoshida, Min-Woong Seo, Shoji Kawahito, Shinji Tanaka
Spectral study of metabolism-based autofluorescence and white-light reflectance for endoscopic tumor imaging. EMBC (2015)
Han Sang Man, Taishi Takasawa, Tomoyuki Akahori, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
7.4 A 413×240-pixel sub-centimeter resolution Time-of-Flight CMOS image sensor with in-pixel background canceling using lateral-electric-field charge modulators. ISSCC (2014)
Kamel Mars, Beak Guseul, Sang-Man Han, Taishi Takasawa, Keita Yasutomi, Keiichiro Kagawa, Mamoru Hashimoto, Shoji Kawahito
A stimulated Raman scattering imager using high-speed lateral electric field modulator and lock-in pixels amplifiers. IMSE (2014)
Min-Woong Seo, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
A high fill-factor low dark leakage CMOS image sensor with shared-pixel design. IMSE (2014)
Kamel Mars, Ken Egawa, Lioe De Xing, Han Sang Man, Taishi Takasawa, Keita Yasutomi, Keiichiro Kagawa, Mamoru Hashimoto, Shoji Kawahito
Lock-in pixels readout circuit using a high speed lateral electric field modulator with differential charge accumulation for stimulated Raman scattering imager. NEWCAS (2014)
Takahiro Usui, Keita Yasutomi, Sang-Man Han, Taishi Takasawa, Keiichiro Kagawa, Shoji Kawahito
An indirect time-of-flight measurement technique for sub-mm range resolution using impulse photocurrent response. IMSE (2014)
Takaya Yamazato, Isamu Takai, Hiraku Okada, Toshiaki Fujii, Tomohiro Yendo, Shintaro Arai, Michinori Andoh, Tomohisa Harada, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
Image-sensor-based visible light communication for automotive applications. IEEE Commun. Mag. 52 (7) (2014)
Bo Zhang, Keiichiro Kagawa, Taishi Takasawa, Min-Woong Seo, Keita Yasutomi, Shoji Kawahito
RTS Noise and Dark Current White Defects Reduction Using Selective Averaging Based on a Multi-Aperture System. Sensors 14 (1) (2014)
Keita Yasutomi, Sang-Man Han, Min-Woong Seo, Taishi Takasawa, Keiichiro Kagawa, Shoji Kawahito
A time-resolved image sensor for tubeless streak cameras. IMSE (2014)
Sang-Man Han, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
A CMOS time-of-flight range image sensor using draining only modulation structure. IMSE (2014)
Keita Yasutomi, Takahiro Usui, Han Sang Man, Taishi Takasawa, Keiichiro Kagawa, Shoji Kawahito
7.5 A 0.3mm-resolution Time-of-Flight CMOS range imager with column-gating clock-skew calibration. ISSCC (2014)
Min-Woong Seo, Keiichiro Kagawa, Keita Yasutomi, Shoji Kawahito
A custom CMOS imager for multi-beam laser scanning microscopy and an improvement of scanning speed. Sensors, Cameras, and Systems for Industrial and Scientific Applications (2013)
Sung-Wook Jun, Lianghua Miao, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
Design of a Digitally Error-Corrected Pipeline ADC Using Incomplete Settling of Pre-Charged Residue Amplifiers. IEICE Trans. Electron. (6) (2013)
Mohd Amrallah Mustafa, Min-Woong Seo, Shoji Kawahito, Keita Yasutomi, Keiichiro Kagawa
RTS noise reduction of CMOS image sensors using amplifier-selection pixels. IEICE Electron. Express 10 (15) (2013)
Masashi Okada, Masahide Hatanaka, Keiichiro Kagawa, Shinichi Miyamoto
Realization of Secure Ambient Wireless Network System Based on Spatially Distributed Ciphering Function. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (11) (2013)
Keiichiro Kagawa, Rui Shogenji, Eiji Tanaka, Kenji Yamada, Shoji Kawahito, Jun Tanida
Variable field-of-view visible and near-infrared polarization compound-eye endoscope. EMBC (2012)
Min-Woong Seo, An Wang, Zhuo Li, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
A CMOS imager using focal-plane pinhole effect for confocal multibeam scanning microscopy. Sensors, Cameras, and Systems for Industrial and Scientific Applications (2012)
Kazuyuki Fujita, Yuichi Itoh, Hiroyuki Ohsaki, Naoaki Ono, Keiichiro Kagawa, Kazuki Takashima, Sho Tsugawa, Kosuke Nakajima, Yusuke Hayashi, Fumio Kishino
Ambient Suite: Room-shaped information environment for interpersonal communication. VR (2012)
Sho Tsugawa, Hiroyuki Ohsaki, Yuichi Itoh, Naoaki Ono, Keiichiro Kagawa, Kazuki Takashima, Makoto Imase
Toward large-scale and dynamic social network analysis with heterogeneous sensors in ambient environment. VR (2012)
Kaita Imai, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito
A distributed ramp signal generator of column-parallel single-slope ADCs for CMOS image sensors. IEICE Electron. Express 9 (24) (2012)
Kazuyuki Fujita, Yuichi Itoh, Hiroyuki Ohsaki, Naoaki Ono, Keiichiro Kagawa, Kazuki Takashima, Sho Tsugawa, Kosuke Nakajima, Yusuke Hayashi, Fumio Kishino
Ambient Suite: enhancing communication among multiple participants. Advances in Computer Entertainment Technology (2011)
Sho Tsugawa, Hiroyuki Ohsaki, Yuichi Itoh, Naoaki Ono, Keiichiro Kagawa, Kazuki Takashima, Makoto Imase
Quasi-realtime social network construction with heterogeneous sensors in ambient environment. Advances in Computer Entertainment Technology (2011)
Keiichiro Kagawa, Jun Tanida
Demonstration of Wide-angle Beam Steering Optics in Wavelength-division-multiplexing Indoor Optical Wireless LAN with Dedicated CMOS Imager. BIONETICS (2008)
Keiichiro Kagawa, Sanshiro Shishido, Tatsuya Sasaki, Itsuki Nagahata, Masahiro Nunoshita, Jun Ohta
A low-voltage PWM CMOS imager with small pixel size using an in-pixel gate-common comparator. IEICE Electron. Express 4 (8) (2007)
Keiichiro Kagawa, Makoto Shouho, Kazuo Hashiguchi, Masahiro Nunoshita, Jun Ohta
Preliminary Demonstration of 1.0 V CMOS Imager with Semi-Pixel-Level ADC Based on Pulse-Width-Modulation Pixel Readout. IEICE Trans. Electron. (10) (2007)
Jun Ohta, Takahashi Tokuda, Keiichiro Kagawa, Akihiro Uehara, Yasuo Terasawa, Kazuaki Nakauchi, Takashi Fujikado, Yasuo Tano
A multi-microchip retinal stimulator for in vitro / in vivo experiments. ISCAS (2007)
Takahashi Tokuda, David C. Ng, Akio Yamamoto, Keiichiro Kagawa, Masahiro Nunoshita, Jun Ohta
An optical and potential dual-image CMOS sensor for on-chip neural and DNA imaging applications. ISCAS (2006)
David C. Ng, Tetsuo Furumiya, Koichi Yasuoka, Akihiro Uehara, Keiichiro Kagawa, Takashi Tokuda, Masahiro Nunoshita, Jun Ohta
Pulse frequency modulation based CMOS image sensor for subretinal stimulation. IEEE Trans. Circuits Syst. II Express Briefs (6) (2006)
Jun Ohta, Takahashi Tokuda, Keiichiro Kagawa, Akihiro Uehara, Yasuo Terasawa, Kenzo Shodo, Takashi Fujikado, Yasuo Tano
Toward 1000-ch electrode array based on distributed microchip architecture for retinal prosthesis. ISCAS (2006)
Takashi Tokuda, Masayuki Kawada, Sachie Sugitani, Mari Taniyama, Akihiro Uehara, Keiichiro Kagawa, Masahiro Nunoshita, Jun Ohta
A multi-chip-architecture based flexible stimulation device for retinal prosthesis with a flip-chip packaging technique. EMBC (2006)
Jun Ohta, Keiichiro Kagawa, Takashi Tokuda, Masahiro Nunoshita
Retinal prosthesis device based on pulse-frequency-modulation vision chip. ISCAS (3) (2005)
Jun Ohta, Takahashi Tokuda, Keiichiro Kagawa, Masahiro Nunoshita, Sadao Shiosaka
Pulse modulation CMOS image sensor for bio-fluorescence imaging applications. ISCAS (4) (2005)
Akihiro Uehara, Keiichiro Kagawa, Takashi Tokuda, Jun Ohta, Masahiro Nunoshita
A high-sensitive digital photosensor using MOS interface-trap charge pumping. IEICE Electron. Express 1 (18) (2004)
Jun Ohta, Keiichiro Kagawa, Koichi Yamamoto, Takashi Tokuda, Yu Oya, Masahiro Nunoshita
Improvement of saturation characteristics of a frequency-demodulation CMOS image sensor. ASP-DAC (2004)
Keiichiro Kagawa, Tomoaki Kawakami, Hiroaki Asazu, Takashi Ikeuchi, Akiko Fujiuchi, Jun Ohta, Masahiro Nunoshita
An image-sensor-based optical receiver fabricated in a standard 0.35-µm CMOS technology for free-space optical communications. ASP-DAC (2004)
Jun Ohta, Tetsuo Furumiya, David C. Ng, Akihiro Uehara, Keiichiro Kagawa, Takashi Tokuda, Masahiro Nunoshita
A retinal prosthetic device using a pulse-frequency-modulation CMOS image sensor. ASP-DAC (2004)
Keiichiro Kagawa, Kouichi Nitta, Yusuke Ogura, Jun Tanida, Yoshiki Ichioka
Architecture Description and Prototype Demonstration of Optoelectronic Parallel-Matching Architecture. IPDPS Workshops (2000)
Keiichiro Kagawa, Yutaka Sugino, Katsuhiko Kagami, Masahiro Ueda
Detection of water amount on the surface of glass fibers using the transient leakage current of static electricity. IEEE Trans. Instrum. Meas. 48 (1) (1999)