Koji Kotani

According to our database, Koji Kotani authored at least 82 papers between 1993 and 2021.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2021

NAEM: Noisy Attention Exploration Module for Deep Reinforcement Learning.

Zhenwen Cai, Feifei Lee, Chunyan Hu, Koji Kotani, Qiu Chen

IEEE Access, 2021

2020

Scene recognition: A comprehensive survey.

Lin Xie, Feifei Lee, Li Liu, Koji Kotani, Qiu Chen

Pattern Recognit., 2020

Photovoltaic-assisted self-<i>V</i>th-cancellation CMOS rectifier for synergistic RF energy harvesting.

Ren Usami, Takao Komiyama, Yasunori Chonan, Hiroyuki Yamaguchi, Koji Kotani

IEICE Electron. Express, 2020

RS-CapsNet: An Advanced Capsule Network.

Shuai Yang, Feifei Lee, Ran Miao, Jiawei Cai, Lu Chen, Wei Yao, Koji Kotani, Qiu Chen

IEEE Access, 2020

Pedestrian as Points: An Improved Anchor-Free Method for Center-Based Pedestrian Detection.

Jiawei Cai, Feifei Lee, Shuai Yang, Chaowei Lin, Hanqing Chen, Koji Kotani, Qiu Chen

IEEE Access, 2020

2019

RF Rectifier Absolute Figure of Merit Based on Relative Comparison with Reference Rectifier.

Koji Kotani, Shota Inoue, Takao Komiyama, Yasunori Chonan, Hiroyuki Yamaguchi

Proceedings of the IEEE International Symposium on Circuits and Systems, 2019

2018

Photovoltaic-Assisted Self-Vth-Cancellation CMOS RF Rectifier for Wide Power Range Operation.

Ren Usami, Takao Komiyama, Yasunori Chonan, Hiroyuki Yamaguchi, Koji Kotani

Proceedings of the IEEE Asian Solid-State Circuits Conference, 2018

2017

Video copy detection using histogram based spatio-temporal features.

Feifei Lee, Junjie Zhao, Koji Kotani, Qiu Chen

Proceedings of the 10th International Congress on Image and Signal Processing, 2017

Improved multiple histogram-based features for robust face recognition.

Qiu Chen, Feifei Lee, Koji Kotani

Proceedings of the 10th International Congress on Image and Signal Processing, 2017

2016

Face Recognition Using Multiple Histogram Features in Spatial and Frequency Domains.

Qiu Chen, Koji Kotani, Feifei Lee

Proceedings of the 12th International Conference on Signal-Image Technology & Internet-Based Systems, 2016

2015

Efficiency Improvement in Photovoltaic-Assisted CMOS Rectifier with Symmetric and Voltage-Boost PV-Cells.

Koji Kotani

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015

2014

A Photovoltaic-Assisted CMOS Rectifier for Synergistic Energy Harvesting from Ambient Radio Waves.

Koji Kotani, Takumi Bando, Yuki Sasaki

IEICE Trans. Electron., 2014

Face Recognition Using Markov Stationary Features and Vector Quantization Histogram.

Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi

Proceedings of the 17th IEEE International Conference on Computational Science and Engineering, 2014

2013

Highly efficient CMOS rectifier assisted by symmetric and voltage-boost PV-cell structures for synergistic ambient energy harvesting.

Koji Kotani

Proceedings of the IEEE 2013 Custom Integrated Circuits Conference, 2013

2011

A Robust Face Recognition Algorithm Using Markov Stationary Features and Adjacent Pixel Intensity Difference Quantization Histogram.

Feifei Lee, Koji Kotani, Qiu Chen, Tadahiro Ohmi

Proceedings of the Seventh International Conference on Signal-Image Technology and Internet-Based Systems, 2011

An Improved Face Recognition Algorithm Using Quantized DCT Coefficients.

Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi

Proceedings of the Seventh International Conference on Signal-Image Technology and Internet-Based Systems, 2011

2010

A Codebook Design Method for Robust VQ-Based Face Recognition Algorithm.

Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi

J. Softw. Eng. Appl., 2010

Highly Reliable and Drivability-Enhanced MOS Transistors with Rounded Nanograting Channels.

Takashi Ito, Xiaoli Zhu, Shin-Ichiro Kuroki, Koji Kotani

IEICE Trans. Electron., 2010

Fast and efficient search for MPEG-4 video using adjacent pixel intensity difference quantization histogram feature.

Feifei Lee, Koji Kotani, Qiu Chen, Tadahiro Ohmi

Proceedings of the Second International Conference on Digital Image Processing, 2010

Feature facial image recognition using VQ histogram in the DCT domain.

Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi

Proceedings of the Second International Conference on Digital Image Processing, 2010

A WiMAX turbo decoder with tailbiting BIP architecture.

Hiroaki Arai, Naoto Miyamoto, Koji Kotani, Hisanori Fujisawa, Takashi Ito

Proceedings of the 15th Asia South Pacific Design Automation Conference, 2010

2009

High-Efficiency Differential-Drive CMOS Rectifier for UHF RFIDs.

Koji Kotani, Atsushi Sasaki, Takashi Ito

IEEE J. Solid State Circuits, 2009

Self-Vth-Cancellation High-Efficiency CMOS Rectifier Circuit for UHF RFIDs.

Koji Kotani, Takashi Ito

IEICE Trans. Electron., 2009

2008

Shot change detection using a novel histogram feature in compressed video.

Feifei Lee, Koji Kotani, Qiu Chen, Tadahiro Ohmi

IEICE Electron. Express, 2008

Fast search method for vector quantization by simultaneously using two subvectors.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2008 IEEE International Conference on Multimedia and Expo, 2008

Fast Search Algorithm for Short Video Clips from Large Video Database Using a Novel Histogram Feature.

Feifei Lee, Koji Kotani, Qiu Chen, Tadahiro Ohmi

Proceedings of the 2008 International Conferences on Computational Intelligence for Modelling, 2008

Scale-Invariant Feature Extraction by VQ-Based Local Image Descriptor.

Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi

Proceedings of the 2008 International Conferences on Computational Intelligence for Modelling, 2008

2007

Characteristics of Nano-Grating N-Channel MOSFETs for Improved Current Drivability.

Xiaoli Zhu, Shin-Ichiro Kuroki, Koji Kotani, Hideharu Shido, Masatoshi Fukuda, Yasuyoshi Mishima, Takashi Ito

IEICE Trans. Electron., 2007

Fast Encoding Method of Vector Quantization Based on Optimal Subvector Partition.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 15th International Conference on Digital Signal Processing, 2007

Improved fast encoding method of vector quantization based on dynamic element reordering for codewords.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 18th European Conference on Circuit Theory and Design, 2007

Improving Execution Speed of FPGA using Dynamically Reconfigurable Technique.

Roel Pantonial, Md. Ashfaquzzaman Khan, Naoto Miyamoto, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi

Proceedings of the 12th Conference on Asia South Pacific Design Automation, 2007

2006

Improved the-law-of-cosines-based fast search method for vector quantization by updating angular information.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Pattern Recognit. Lett., 2006

Comments on: Novel full-search schemes for speeding up image coding using vector quantization.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

J. Vis. Commun. Image Represent., 2006

Post-Processing Method for Vector Quantization to Achieve a Higher PSNR and Nearly Constant Bit Rate.

Zhibin Pan, Tadahiro Ohmi, Koji Kotani

Intell. Autom. Soft Comput., 2006

An Efficient Method of Constructing L₁-Type Norm Feature to Estimate Euclidean Distance for Fast Vector Quantization.

Zhibin Pan, Tadahiro Ohmi, Koji Kotani

Intell. Autom. Soft Comput., 2006

Image Scrambling Method for Information Distribution Via Vector Quantization Codebook Processing.

Takahiro Nakayama, Koji Takeuchi, Masahiro Konda, Koji Kotani, Tadahiro Ohmi

Intell. Autom. Soft Comput., 2006

Still Image Compression with Mean-Residual Domain Adaptive Resolution Vector Quantization Technique.

Takahiro Nakayama, Masahiro Konda, Koji Takeuchi, Koji Kotani, Tadahiro Ohmi

Intell. Autom. Soft Comput., 2006

Region-Division Vector Quantization Histogram Method for Human Face Recognition.

Koji Kotani, Qiu Chen, Feifei Lee, Tadahiro Ohmi

Intell. Autom. Soft Comput., 2006

Fast encoding method for vector quantization based on sorting elements of codewords to adaptively constructing subvectors.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the International Symposium on Circuits and Systems (ISCAS 2006), 2006

Constructing Better Partial Sums Based on Energy-Maximum Criterion for Fast Encoding of VQ.

Zhibin Pan, Tadahiro Ohmi, Koji Kotani

Proceedings of the IEEE Asia Pacific Conference on Circuits and Systems 2006, 2006

2005

Fast encoding method for vector quantization using modified L₂-norm pyramid.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

IEEE Signal Process. Lett., 2005

Recursive computation method for fast encoding of vector quantization based on 2-pixel-merging sum pyramid data structure.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Pattern Recognit. Lett., 2005

A generalized multiple projection axes method for fast encoding of vector quantization.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Pattern Recognit. Lett., 2005

A 3.7×3.7mm² 310.9mW 105.2msec 512×512-Pixel Phase-Only Correlation Processor.

Naoto Miyamoto, Koji Kotani, Tadahiro Ohmi

J. Robotics Mechatronics, 2005

Performance Comparison between Equal-Average Equal-Variance Equal-Norm Nearest Neighbor Search (EEENNS) Method and Improved Equal-Average Equal-Variance Nearest Neighbor Search (IEENNS) Method for Fast Encoding of Vector Quantization.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

IEICE Trans. Inf. Syst., 2005

Improved fast encoding method for vector quantization based on subvector technique.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the International Symposium on Circuits and Systems (ISCAS 2005), 2005

Fast Search Method for Image Vector Quantization Based on Equal-Average Equal-Variance and Partial Sum Concept.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2005 IEEE International Conference on Multimedia and Expo, 2005

Enhanced fast encoding method for vector quantization by finding an optimally-ordered Walsh transform kernel.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2005 International Conference on Image Processing, 2005

Fast Encoding Method for Vector Quantization Based on a New Mixed Pyramid Data Structure.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2005 IEEE International Conference on Acoustics, 2005

Fast encoding method for image vector quantization by using partial sum concept in Walsh domain.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 13th European Signal Processing Conference, 2005

2004

Practical charge-transfer amplifier design architectures for low-power flash A/D converters.

William J. Marble, Koji Kotani, Craig S. Petrie

IEEE Trans. Circuits Syst. I Regul. Pap., 2004

A unified projection method for fast search of vector quantization.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

IEEE Signal Process. Lett., 2004

An improved full-search-equivalent vector quantization method using the law of cosines.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

IEEE Signal Process. Lett., 2004

An improved fast encoding algorithm for vector quantization using 2-pixel-merging sum pyramid data structure.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Pattern Recognit. Lett., 2004

An Improved Fast Encoding Algorithm for Vector Quantization Using 2-Pixel-Merging Sum Pyramid and Manhattan-Distance-First Check.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

IEICE Trans. Inf. Syst., 2004

A Fast Encoding Method for Vector Quantization by using Multi Euclidean Distance Estimations.

Zhibin Pan, Tadahiro Ohmi, Koji Kotani

Intell. Autom. Soft Comput., 2004

Face Recognition Algorithm using Vector Quantization Codebook Space Information Processing.

Tadahiro Ohmi, Koji Kotani, Qiu Chen, Feifei Lee

Intell. Autom. Soft Comput., 2004

Still Image Compression with Adaptive Resolution Vector Quantization Technique.

Takahiro Nakayama, Masahiro Konda, Koji Takeuchi, Koji Kotani, Tadahiro Ohmi

Intell. Autom. Soft Comput., 2004

Robust Face Detection Combined Skin Color Features, Template Matching and VQ Histogram Method in Practical Environments.

Qiu Chen, Koji Kotani, Yoshiyuki Taniguchi, Zhibin Pan, Tadahiro Ohmi

Intell. Autom. Soft Comput., 2004

A Dynamically-Reconfigurable Image Recognition Processor.

Kazuyuki Maruo, Masayoshi Ichikawa, Naoto Miyamoto, Leo Karnan, Takahiro J. Yamaguchi, Koji Kotani, Tadahiro Ohmi

Proceedings of the 18th International Parallel and Distributed Processing Symposium (IPDPS 2004), 2004

An improved fast encoding method for vector quantization based on memory-efficient data structure.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2004 IEEE International Conference on Multimedia and Expo, 2004

Improved fast search method for vector quantization using discrete walsh transform.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2004 International Conference on Image Processing, 2004

A memory-efficient fast encoding method for vector quantization using 2-pixel-merging sum pyramid.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2004 IEEE International Conference on Acoustics, 2004

An approach to realize time-sharing of flip-flops in time-multiplexed FPGAs.

Md. Ashfaquzzaman Khan, Naoto Miyamoto, Takeshi Ohkawa, Amir Jamak, Soichiro Kita, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2004 IEEE International Conference on Field-Programmable Technology, 2004

A fast search method for vector quantization using 2-pixel-merging sum pyramid in recursive way.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2004 12th European Signal Processing Conference, 2004

An image recognition processor using dynamically reconfigurable ALU.

Naoto Miyamoto, Koji Kotani, Kazuyuki Maruo, Tadahiro Ohmi

Proceedings of the IEEE 2004 Custom Integrated Circuits Conference, 2004

The flexible processor an approach for single-chip hardware emulation by dynamic reconfiguration.

Takeshi Ohkawa, Toshiyuki Nozawa, Masanori Fujibayashi, Naoto Miyamoto, Leo Karnan, Soichiro Kita, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2004 Conference on Asia South Pacific Design Automation: Electronic Design and Solution Fair 2004, 2004

A small-area high-performance 512-point 2-dimensional FFT single-chip processor.

Naoto Miyamoto, Leo Karnan, Kazuyuki Maruo, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2004 Conference on Asia South Pacific Design Automation: Electronic Design and Solution Fair 2004, 2004

2003

A still-image encoder based on adaptive resolution vector quantization featuring needless calculation elimination architecture.

Masanori Fujibayashi, Toshiyuki Nozawa, Takahiro Nakayama, Kenji Mochizuki, Masahiro Konda, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi

IEEE J. Solid State Circuits, 2003

A Fast Encoding Method for Vector Quantization Based on 2-Pixel-Merging Sum Pyramid Data Structure.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003

A fast full search equivalent encoding method for vector quantization by using appropriate features.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2003 IEEE International Conference on Multimedia and Expo, 2003

Adaptive resolution vector quantization technique and basic codebook design method for compound image compression.

Takahiro Nakayama, Masahiro Konda, Koji Takeuchi, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2003 IEEE International Conference on Multimedia and Expo, 2003

Still image compression method based on adaptive block segmentation vector quantization technique.

Takahiro Nakayama, Koji Takeuchi, Masahiro Konda, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2003 International Conference on Image Processing, 2003

A still image encoder based on adaptive resolution vector quantization employing needless calculation elimination architecture.

Masanori Fujibayashi, Toshiyuki Nozawa, Takahiro Nakayama, Kenji Mochizuki, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi

Proceedings of the 2003 Asia and South Pacific Design Automation Conference, 2003

2002

A hierarchical fast encoding algorithm for vector quantization with PSNR equivalent to full search.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the 2002 International Symposium on Circuits and Systems, 2002

Face recognition using vector quantization histogram method.

Koji Kotani, Feifei Lee, Qiu Chen, Tadahiro Ohmi

Proceedings of the 2002 International Conference on Image Processing, 2002

2001

New paradigm of silicon technology.

Tadahiro Ohmi, Shigetoshi Sugawa, Koji Kotani, Masaki Hirayama, Akihiro Morimoto

Proc. IEEE, 2001

2000

A parallel vector-quantization processor eliminating redundant calculations for real-time motion picture compression.

Toshiyuki Nozawa, Masahiro Konda, Masanori Fujibayashi, Makoto Imai, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi

IEEE J. Solid State Circuits, 2000

A fast search method of speaker identification for large population using pre-selection and hierarchical matching.

Zhibin Pan, Koji Kotani, Tadahiro Ohmi

Proceedings of the Sixth International Conference on Spoken Language Processing, 2000

1999

Association hardware for intelligent electronic systems.

Tadahiro Ohmi, Tadashi Shibata, Koji Kotani, Tsutomu Nakai, Akira Nakada, Ning Mei Yu, Masahiro Konda, Tatsuo Morimoto, Yuichiro Yamashita

Syst. Comput. Jpn., 1999

1998

CMOS charge-transfer preamplifier for offset-fluctuation cancellation in low-power A/D converters.

Koji Kotani, Tadashi Shibata, Tadahiro Ohmi

IEEE J. Solid State Circuits, 1998

1993

Implementing Intelligence on Silicon Using Neuron-Like Functional MOS Transistors.

Tadashi Shibata, Koji Kotani, Takeo Yamashita, Hiroshi Ishii, Hideo Kosaka, Tadahiro Ohmi

Proceedings of the Advances in Neural Information Processing Systems 6, 1993