Koji Kotani

Publication Activity (10 Years)

Years Active: 1993-2021
Publications (10 Years): 10

Top Topics

Vector Quantization

Video Copy Detection

Exploration Exploitation Tradeoff

Face Recognition

Top Venues

Pattern Recognit.

Publications

Zhenwen Cai, Feifei Lee, Chunyan Hu, Koji Kotani, Qiu Chen
NAEM: Noisy Attention Exploration Module for Deep Reinforcement Learning. IEEE Access 9 (2021)
Ren Usami, Takao Komiyama, Yasunori Chonan, Hiroyuki Yamaguchi, Koji Kotani
th-cancellation CMOS rectifier for synergistic RF energy harvesting. IEICE Electron. Express 17 (13) (2020)
Shuai Yang, Feifei Lee, Ran Miao, Jiawei Cai, Lu Chen, Wei Yao, Koji Kotani, Qiu Chen
RS-CapsNet: An Advanced Capsule Network. IEEE Access 8 (2020)
Lin Xie, Feifei Lee, Li Liu, Koji Kotani, Qiu Chen
Scene recognition: A comprehensive survey. Pattern Recognit. 102 (2020)
Jiawei Cai, Feifei Lee, Shuai Yang, Chaowei Lin, Hanqing Chen, Koji Kotani, Qiu Chen
Pedestrian as Points: An Improved Anchor-Free Method for Center-Based Pedestrian Detection. IEEE Access 8 (2020)
Koji Kotani, Shota Inoue, Takao Komiyama, Yasunori Chonan, Hiroyuki Yamaguchi
RF Rectifier Absolute Figure of Merit Based on Relative Comparison with Reference Rectifier. ISCAS (2019)
Ren Usami, Takao Komiyama, Yasunori Chonan, Hiroyuki Yamaguchi, Koji Kotani
Photovoltaic-Assisted Self-Vth-Cancellation CMOS RF Rectifier for Wide Power Range Operation. A-SSCC (2018)
Feifei Lee, Junjie Zhao, Koji Kotani, Qiu Chen
Video copy detection using histogram based spatio-temporal features. CISP-BMEI (2017)
Qiu Chen, Feifei Lee, Koji Kotani
Improved multiple histogram-based features for robust face recognition. CISP-BMEI (2017)
Qiu Chen, Koji Kotani, Feifei Lee
Face Recognition Using Multiple Histogram Features in Spatial and Frequency Domains. SITIS (2016)
Koji Kotani
Efficiency Improvement in Photovoltaic-Assisted CMOS Rectifier with Symmetric and Voltage-Boost PV-Cells. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (2) (2015)
Koji Kotani, Takumi Bando, Yuki Sasaki
A Photovoltaic-Assisted CMOS Rectifier for Synergistic Energy Harvesting from Ambient Radio Waves. IEICE Trans. Electron. (4) (2014)
Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi
Face Recognition Using Markov Stationary Features and Vector Quantization Histogram. CSE (2014)
Koji Kotani
Highly efficient CMOS rectifier assisted by symmetric and voltage-boost PV-cell structures for synergistic ambient energy harvesting. CICC (2013)
Feifei Lee, Koji Kotani, Qiu Chen, Tadahiro Ohmi
A Robust Face Recognition Algorithm Using Markov Stationary Features and Adjacent Pixel Intensity Difference Quantization Histogram. SITIS (2011)
Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi
An Improved Face Recognition Algorithm Using Quantized DCT Coefficients. SITIS (2011)
Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi
Feature facial image recognition using VQ histogram in the DCT domain. ICDIP (2010)
Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi
A Codebook Design Method for Robust VQ-Based Face Recognition Algorithm. J. Softw. Eng. Appl. 3 (2) (2010)
Hiroaki Arai, Naoto Miyamoto, Koji Kotani, Hisanori Fujisawa, Takashi Ito
A WiMAX turbo decoder with tailbiting BIP architecture. ASP-DAC (2010)
Takashi Ito, Xiaoli Zhu, Shin-Ichiro Kuroki, Koji Kotani
Highly Reliable and Drivability-Enhanced MOS Transistors with Rounded Nanograting Channels. IEICE Trans. Electron. (11) (2010)
Feifei Lee, Koji Kotani, Qiu Chen, Tadahiro Ohmi
Fast and efficient search for MPEG-4 video using adjacent pixel intensity difference quantization histogram feature. ICDIP (2010)
Koji Kotani, Atsushi Sasaki, Takashi Ito
High-Efficiency Differential-Drive CMOS Rectifier for UHF RFIDs. IEEE J. Solid State Circuits 44 (11) (2009)
Koji Kotani, Takashi Ito
Self-Vth-Cancellation High-Efficiency CMOS Rectifier Circuit for UHF RFIDs. IEICE Trans. Electron. (1) (2009)
Qiu Chen, Koji Kotani, Feifei Lee, Tadahiro Ohmi
Scale-Invariant Feature Extraction by VQ-Based Local Image Descriptor. CIMCA/IAWTIC/ISE (2008)
Feifei Lee, Koji Kotani, Qiu Chen, Tadahiro Ohmi
Fast Search Algorithm for Short Video Clips from Large Video Database Using a Novel Histogram Feature. CIMCA/IAWTIC/ISE (2008)
Feifei Lee, Koji Kotani, Qiu Chen, Tadahiro Ohmi
Shot change detection using a novel histogram feature in compressed video. IEICE Electron. Express 5 (14) (2008)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Fast search method for vector quantization by simultaneously using two subvectors. ICME (2008)
Roel Pantonial, Md. Ashfaquzzaman Khan, Naoto Miyamoto, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi
Improving Execution Speed of FPGA using Dynamically Reconfigurable Technique. ASP-DAC (2007)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Improved fast encoding method of vector quantization based on dynamic element reordering for codewords. ECCTD (2007)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Fast Encoding Method of Vector Quantization Based on Optimal Subvector Partition. DSP (2007)
Xiaoli Zhu, Shin-Ichiro Kuroki, Koji Kotani, Hideharu Shido, Masatoshi Fukuda, Yasuyoshi Mishima, Takashi Ito
Characteristics of Nano-Grating N-Channel MOSFETs for Improved Current Drivability. IEICE Trans. Electron. (9) (2007)
Zhibin Pan, Tadahiro Ohmi, Koji Kotani
Post-Processing Method for Vector Quantization to Achieve a Higher PSNR and Nearly Constant Bit Rate. Intell. Autom. Soft Comput. 12 (3) (2006)
Zhibin Pan, Tadahiro Ohmi, Koji Kotani
-Type Norm Feature to Estimate Euclidean Distance for Fast Vector Quantization. Intell. Autom. Soft Comput. 12 (3) (2006)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Comments on: Novel full-search schemes for speeding up image coding using vector quantization. J. Vis. Commun. Image Represent. 17 (3) (2006)
Takahiro Nakayama, Masahiro Konda, Koji Takeuchi, Koji Kotani, Tadahiro Ohmi
Still Image Compression with Mean-Residual Domain Adaptive Resolution Vector Quantization Technique. Intell. Autom. Soft Comput. 12 (3) (2006)
Koji Kotani, Qiu Chen, Feifei Lee, Tadahiro Ohmi
Region-Division Vector Quantization Histogram Method for Human Face Recognition. Intell. Autom. Soft Comput. 12 (3) (2006)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Improved the-law-of-cosines-based fast search method for vector quantization by updating angular information. Pattern Recognit. Lett. 27 (6) (2006)
Takahiro Nakayama, Koji Takeuchi, Masahiro Konda, Koji Kotani, Tadahiro Ohmi
Image Scrambling Method for Information Distribution Via Vector Quantization Codebook Processing. Intell. Autom. Soft Comput. 12 (3) (2006)
Zhibin Pan, Tadahiro Ohmi, Koji Kotani
Constructing Better Partial Sums Based on Energy-Maximum Criterion for Fast Encoding of VQ. APCCAS (2006)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Fast encoding method for vector quantization based on sorting elements of codewords to adaptively constructing subvectors. ISCAS (2006)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
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. IEICE Trans. Inf. Syst. (9) (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
-norm pyramid. IEEE Signal Process. Lett. 12 (9) (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Enhanced fast encoding method for vector quantization by finding an optimally-ordered Walsh transform kernel. ICIP (1) (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Recursive computation method for fast encoding of vector quantization based on 2-pixel-merging sum pyramid data structure. Pattern Recognit. Lett. 26 (11) (2005)
Naoto Miyamoto, Koji Kotani, Tadahiro Ohmi
310.9mW 105.2msec 512×512-Pixel Phase-Only Correlation Processor. J. Robotics Mechatronics 17 (4) (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A generalized multiple projection axes method for fast encoding of vector quantization. Pattern Recognit. Lett. 26 (9) (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Improved fast encoding method for vector quantization based on subvector technique. ISCAS (6) (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Fast Encoding Method for Vector Quantization Based on a New Mixed Pyramid Data Structure. ICASSP (2) (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Fast encoding method for image vector quantization by using partial sum concept in Walsh domain. EUSIPCO (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Fast Search Method for Image Vector Quantization Based on Equal-Average Equal-Variance and Partial Sum Concept. ICME (2005)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
Improved fast search method for vector quantization using discrete walsh transform. ICIP (2004)
Takeshi Ohkawa, Toshiyuki Nozawa, Masanori Fujibayashi, Naoto Miyamoto, Leo Karnan, Soichiro Kita, Koji Kotani, Tadahiro Ohmi
The flexible processor an approach for single-chip hardware emulation by dynamic reconfiguration. ASP-DAC (2004)
Kazuyuki Maruo, Masayoshi Ichikawa, Naoto Miyamoto, Leo Karnan, Takahiro J. Yamaguchi, Koji Kotani, Tadahiro Ohmi
A Dynamically-Reconfigurable Image Recognition Processor. IPDPS (2004)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
An improved full-search-equivalent vector quantization method using the law of cosines. IEEE Signal Process. Lett. 11 (2) (2004)
Naoto Miyamoto, Koji Kotani, Kazuyuki Maruo, Tadahiro Ohmi
An image recognition processor using dynamically reconfigurable ALU. CICC (2004)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
An improved fast encoding method for vector quantization based on memory-efficient data structure. ICME (2004)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A memory-efficient fast encoding method for vector quantization using 2-pixel-merging sum pyramid. ICASSP (3) (2004)
Takahiro Nakayama, Masahiro Konda, Koji Takeuchi, Koji Kotani, Tadahiro Ohmi
Still Image Compression with Adaptive Resolution Vector Quantization Technique. Intell. Autom. Soft Comput. 10 (2) (2004)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
An improved fast encoding algorithm for vector quantization using 2-pixel-merging sum pyramid data structure. Pattern Recognit. Lett. 25 (4) (2004)
Md. Ashfaquzzaman Khan, Naoto Miyamoto, Takeshi Ohkawa, Amir Jamak, Soichiro Kita, Koji Kotani, Tadahiro Ohmi
An approach to realize time-sharing of flip-flops in time-multiplexed FPGAs. FPT (2004)
Tadahiro Ohmi, Koji Kotani, Qiu Chen, Feifei Lee
Face Recognition Algorithm using Vector Quantization Codebook Space Information Processing. Intell. Autom. Soft Comput. 10 (2) (2004)
Zhibin Pan, Tadahiro Ohmi, Koji Kotani
A Fast Encoding Method for Vector Quantization by using Multi Euclidean Distance Estimations. Intell. Autom. Soft Comput. 10 (2) (2004)
Naoto Miyamoto, Leo Karnan, Kazuyuki Maruo, Koji Kotani, Tadahiro Ohmi
A small-area high-performance 512-point 2-dimensional FFT single-chip processor. ASP-DAC (2004)
Qiu Chen, Koji Kotani, Yoshiyuki Taniguchi, Zhibin Pan, Tadahiro Ohmi
Robust Face Detection Combined Skin Color Features, Template Matching and VQ Histogram Method in Practical Environments. Intell. Autom. Soft Comput. 10 (2) (2004)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A unified projection method for fast search of vector quantization. IEEE Signal Process. Lett. 11 (7) (2004)
William J. Marble, Koji Kotani, Craig Petrie
Practical charge-transfer amplifier design architectures for low-power flash A/D converters. IEEE Trans. Circuits Syst. I Regul. Pap. (11) (2004)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A fast search method for vector quantization using 2-pixel-merging sum pyramid in recursive way. EUSIPCO (2004)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
An Improved Fast Encoding Algorithm for Vector Quantization Using 2-Pixel-Merging Sum Pyramid and Manhattan-Distance-First Check. IEICE Trans. Inf. Syst. (2) (2004)
Masanori Fujibayashi, Toshiyuki Nozawa, Takahiro Nakayama, Kenji Mochizuki, Masahiro Konda, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi
A still-image encoder based on adaptive resolution vector quantization featuring needless calculation elimination architecture. IEEE J. Solid State Circuits 38 (5) (2003)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A fast full search equivalent encoding method for vector quantization by using appropriate features. ICME (2003)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A post-processing method for vector quantization to achieve higher PSNR and nearly constant bit rate. ISCAS (2) (2003)
Masanori Fujibayashi, Toshiyuki Nozawa, Takahiro Nakayama, Kenji Mochizuki, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi
A still image encoder based on adaptive resolution vector quantization employing needless calculation elimination architecture. ASP-DAC (2003)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A Fast Encoding Method for Vector Quantization Based on 2-Pixel-Merging Sum Pyramid Data Structure. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (9) (2003)
Takahiro Nakayama, Masahiro Konda, Koji Takeuchi, Koji Kotani, Tadahiro Ohmi
Adaptive resolution vector quantization technique and basic codebook design method for compound image compression. ICME (2003)
Naoto Miyamoto, Leo Karnan, Kazuyuki Maruo, Koji Kotani, Tadahiro Ohmi
A small-area high performance 512-point 2-dimensional FFT single-chip processor. ESSCIRC (2003)
Takahiro Nakayama, Koji Takeuchi, Masahiro Konda, Koji Kotani, Tadahiro Ohmi
Still image compression method based on adaptive block segmentation vector quantization technique. ICIP (2) (2003)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A hierarchical fast encoding algorithm for vector quantization with PSNR equivalent to full search. ISCAS (1) (2002)
Koji Kotani, Feifei Lee, Qiu Chen, Tadahiro Ohmi
Face recognition using vector quantization histogram method. ICIP (2) (2002)
Tadahiro Ohmi, Shigetoshi Sugawa, Koji Kotani, Masaki Hirayama, Akihiro Morimoto
New paradigm of silicon technology. Proc. IEEE 89 (3) (2001)
Zhibin Pan, Koji Kotani, Tadahiro Ohmi
A fast search method of speaker identification for large population using pre-selection and hierarchical matching. INTERSPEECH (2000)
Toshiyuki Nozawa, Masahiro Konda, Masanori Fujibayashi, Makoto Imai, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi
A parallel vector-quantization processor eliminating redundant calculations for real-time motion picture compression. IEEE J. Solid State Circuits 35 (11) (2000)
Tadahiro Ohmi, Tadashi Shibata, Koji Kotani, Tsutomu Nakai, Akira Nakada, Ning Mei Yu, Masahiro Konda, Tatsuo Morimoto, Yuichiro Yamashita
Association hardware for intelligent electronic systems. Systems and Computers in Japan 30 (12) (1999)
Koji Kotani, Tadashi Shibata, Tadahiro Ohmi
CMOS charge-transfer preamplifier for offset-fluctuation cancellation in low-power A/D converters. IEEE J. Solid State Circuits 33 (5) (1998)
Tadashi Shibata, Koji Kotani, Takeo Yamashita, Hiroshi Ishii, Hideo Kosaka, Tadahiro Ohmi
Implementing Intelligence on Silicon Using Neuron-Like Functional MOS Transistors. NIPS (1993)