Design of FIR filters for images based on properties of human vision. - Naoyuki Aikawa; Masamitsu Sato (EUSIPCO, 1998)

Design method of analog lowpass filters with monotonic response and arbitrary flatness. - Takehisa Ueda; Naoyuki Aikawa; Masamitsu Sato (ICECS, 1998)

A design method of low delay FIR bandpass filters. - Atsushi Ogata; Naoyuki Aikawa; Masamitsu Sato (ISCAS, 2000)

The transfer function of low delay maximally flat lowpass FIR digital filters. - Yukio Mori; Naoyuki Aikawa (ISCAS (2), 2001)

Minimax approximation of minimum phase FIR filters. - Yasunori Sugita; Naoyuki Aikawa (ICASSP, 2002)

A design method of low delay lowpass FIR filters with maximally flat characteristics in the passband and the transmission zeros in the stopband. - Naoyuki Aikawa; Masamitsu Sato (ISCAS (1), 2002)

Kernel with block structure for sampling rate converter. - Naoyuki Aikawa; Yukio Mori (ICASSP (6), 2003)

A design method of minimum phase FIR filters with complex coefficients. - Yasunori Sugita; Naoyuki Aikawa (ICASSP (6), 2003)

A fast design algorithm for filters with the restricted roots using multiple extreme frequency points. - Yasunori Sugita; Naoyuki Aikawa (Circuits, Signals, and Systems, 2004)

Design of Low Delay Bandpass FIR Filters with Maximally Flat Characteristics in the Passband and the Transmission Zeros in the Stopband. - Yukio Mori; Naoyuki Aikawa (ICINCO (3), 2004)

Design method of kernel for sampling rate converter using semidefinite programming. - Kouhei Nagasawa; Naoyuki Aikawa (Circuits, Signals, and Systems, 2005)

A design method of two-dimensional linear phase fir filters using Fritz John's theorem. - Yasunori Sugita; Naoyuki Aikawa (ICINCO, 2005)

Designing FIR filter with variable stopbands. - Naoyuki Aikawa; Yukio Mori (ICECS, 2007)

Designing FIR Digital Filters with the Specified Maximum Group Delay Errors. - Yasunori Sugita; Naoyuki Aikawa; Toshinori Yoshikawa (ICECS, 2007)

A design method for separable-denominator 2D IIR filters using a stability criterion based on the system matrix. - Toma Miyata; Naoyuki Aikawa; Yasunori Sugita; Toshinori Yoshikawa (ICECS, 2008)

A Design Method for Separable-Denominator 2D IIR Filters with a Necessary and Sufficient Stability Check. - Toma Miyata; Naoyuki Aikawa; Yasunori Sugita; Toshinori Yoshikawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

A design method for IIR digital filters with variable stopband using semidefinite programming. - Nanako Ubayama; Toma Miyata; Naoyuki Aikawa (ISITA, 2010)

A Design Method for Variable Linear-Phase FIR Filters with Changing Multifactors for Checkweighers. - Toma Miyata; Naoyuki Aikawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010)

Designing two-channel nonuniform-division FIR filter banks with variable notches. - Keisuke Ishizawa; Toma Miyata; Naoyuki Aikawa (ECCTD, 2011)

A design method for FIR filters with complex coefficients by Successive Projection method. - Toma Miyata; Kosuke Teramoto; Naoyuki Aikawa (ISITA, 2012)

An L1-method for designing FIR digital filters with complex coefficients. - Ikuya Murakami; Yukio Mori; Naoyuki Aikawa (ISITA, 2012)

A design method for complex coefficient FIR filters with variable stopband characteristics. - Toma Miyata; Naoyuki Aikawa (ICICS, 2013)

A comb filter with adaptive notch bandwidth for periodic noise reduction. - Yosuke Sugiura; Arata Kawamura; Naoyuki Aikawa (ICICS, 2013)

Designing IIR filters with variable stopbands using SP method. - Toma Miyata; Naoyuki Aikawa; Yasuyuki Nishida (IECON, 2013)

A design method of TYPE IV digital FIR differentiators with maximally flat criterion at an arbitrary frequency. - Takashi Yoshida; Naoyuki Aikawa (IECON, 2013)

Fir band-pass digital differentiators with flat passband and equiripple stopband characteristics. - Takashi Yoshida; Yosuke Sugiura; Naoyuki Aikawa (EUSIPCO, 2014)

A Closed-Form Design of Linear Phase FIR Band-Pass Maximally Flat Digital Differentiators with an Arbitrary Center Frequency. - Takashi Yoshida; Yosuke Sugiura; Naoyuki Aikawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

A design of linear phase band-pass FIR digital differentiators with flat passband and Lp norm-based stopband characteristics. - Kiyoshiro Hamamoto; Takashi Yoshida; Naoyuki Aikawa (ICICS, 2015)

Instantaneous frequency estimation for a sinusoidal signal combining DESA-2 and notch filter. - Yosuke Sugiura; Keisuke Usukura; Naoyuki Aikawa (EUSIPCO, 2015)

A general expression of the low-pass maximally flat FIR digital differentiators. - Takashi Yoshida; Yosuke Sugiura; Naoyuki Aikawa (ISCAS, 2015)

The low delay low-pass FIR digital differentiators having flat passband and equiripple stopband. - Takashi Yoshida; Naoyuki Aikawa (NORCAS, 2015)

A GA-based optimization for multi-band digital filters with the sameness conditions of filter coefficients. - Masayoshi Nakamoto; Tomohiro Hirakawa; Naoyuki Aikawa; Torn Yamamoto (IECON, 2016)

A design method for 2-D low-pass maximally flat FIR digital filter to realize various passband shapes. - Taiki Shinohara; Yasuyuki Nishida; Naoyuki Aikawa (IECON, 2016)

A compensation method of a drift on a vibrating sensor due to an air density. - Kohei Okamoto; Naoyuki Aikawa (MWSCAS, 2016)

A closed-form transfer function of 2-D maximally flat half-band FIR digital filters with arbitrary filter orders. - Taiki Shinohara; Takashi Yoshida; Naoyuki Aikawa (EUSIPCO, 2017)

Enhanced sleep spindle detector based on the Fujimori method. - Yuka Kawashima; Takashi Yoshida; Naoyuki Aikawa; Mitsuo Hayashi (GlobalSIP, 2017)

Designing high order low delay maximally flat FIR digital differentiators with equiripple stopband. - Takahiro Fujikawa; Takashi Yoshida; Naoyuki Aikawa (MWSCAS, 2017)

Design of second-degree IIR digital differentiators without frequency sampling and recursive optimization. - Masayoshi Nakamoto; Naoyuki Aikawa (MWSCAS, 2017)

Design Method for Low-Delay Maximally Flat FIR Digital Differentiators with Variable Stopbands Obtained by Minimizing Lp Norm. - Ryosuke Kunii; Takashi Yoshida; Naoyuki Aikawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017)

Design Method for FIR Filter with Variable Multiple Elements of Stopband Using Genetic Algorithm. - Toma Miyata; Hidehisa Asou; Naoyuki Aikawa (DSP, 2018)

Adaptive Notch Howling Canceller Using Group Delay Information. - Nobuhiro Mikami; Kanji Mashita; Naoyuki Aikawa (ISITA, 2018)

Designing low-delay maximally flat integer-order FIR digital differentiators with equiripple stopband. - Takahiro Fujikawa; Ryosuke Kunii; Naoyuki Aikawa (MWSCAS, 2018)

Reduction of Circuit Scale for General Maximally Flat FIR Digital Filters. - Takashi Yoshida; Naoyuki Aikawa (MWSCAS, 2018)

Low-Delay Band-Pass Maximally Flat FIR Digital Differentiators. - Takashi Yoshida; Naoyuki Aikawa (Circuits Syst. Signal Process., 2018)

A Design Method for Linear Phase FIR Filters with Multiple Variable Factors in the Stopband and Specified High Attenuation. - Toma Miyata; Takahiro Natori; Naoyuki Aikawa (IECON, 2019)

Drone and GPS Sensors-Based Grassland Management Using Deep-Learning Image Segmentation. - Satoki Tsuichihara; Shingo Akita; Reiichirou Ike; Masahiro Shigeta; Hiroshi Takemura; Takahiro Natori; Naoyuki Aikawa; Kazumasa Shindo; Yasuyuki Ide; Shigeki Tejima (IRC, 2019)

A Study on Automatic Detection of Sleep Spindles using a Long Short-Term Memory Network. - Narumi Yasuhara; Takahiro Natori; Mitsuo Hayashi; Naoyuki Aikawa (MWSCAS, 2019)

CTCs extraction method based on frequency-domain filtering from microscope images. - Kento Yoshida; Yin-Ju Chen; Long-Sheng Lu; Shin Aoki; Naoyuki Aikawa (SPA, 2019)

A Closed-Form of 2-D Maximally Flat Diamond-Shaped Half-Band FIR Digital Filters with Arbitrary Difference of the Filter Orders. - Taiki Shinohara; Takashi Yoshida; Naoyuki Aikawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019)

An Improved Method for Instantaneous Frequency Estimation Using a Finite Order Hilbert Transformer. - Keisuke Takao; Takahiro Natori; Toma Miyata; Naoyuki Aikawa (APSIPA, 2020)

Accuracy Improvement of Instantaneous Frequency Estimation by Finite Order FIR Hilbert Transformer Using Notch Filter. - Keisuke Takao; Takahiro Natori; Toma Miyata; Naoyuki Aikawa (MOCAST, 2020)

Design of filters with variable transmission zeros for highly accurate instantaneous frequency estimation. - Keisuke Takao; Takahiro Natori; Naoyuki Aikawa (MWSCAS, 2021)

Minimax Design of Sparse IIR Filters Using Sparse Linear Programming. - Masayoshi Nakamoto; Naoyuki Aikawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

A Two-Step Classification Method for Painting Defects Using Deep Learning. - Kazune Adachi; Takahiro Natori; Naoyuki Aikawa (ICEIC, 2022)

A Highly Accurate Instantaneous Frequency Estimation Method Taking into Account the Aliasing of Oscillation Components. - Keisuke Takao; Takahiro Natori; Naoyuki Aikawa (ICEIC, 2022)

Circulating Tumor Cells Detection by Brightness Values Analysis and Circularity. - Hua Wei; Tomohiro Tanaka; Shin Aoki; Takeshi Yamada; Takahiro Natori; Naoyuki Aikawa (ICFSP, 2022)

A Study on the Influence of Pseudo-Acceleration Vector for Accelerometer Calibration. - Takahiro Natori; Hiromi Takano; Naoyuki Aikawa (MOCAST, 2022)

Study on Calibration Method using Pseudo Acceleration for MEMS Accelerometers. - Takahiro Natori; Naoyuki Aikawa (MOCAST, 2023)

A Method for Measuring Liquid Weight Using a Hilbert Transformer. - Jun Obara; Naoyuki Aikawa (MWSCAS, 2023)

Vibration Frequency Detection of Stepping Motors Using a Finite-Order Hilbert Transformer by a Variable FIR Filter with Transmission Zeros. - Teppei Ota; Masayoshi Nakamoto; Kei Kozakai; Kohei Terashima; Naoyuki Aikawa (MWSCAS, 2023)

Closed Form Approach for Constrained Design of nth-Order IIR Digital Differentiator. - Masayoshi Nakamoto; Naoyuki Aikawa (Circuits Syst. Signal Process., 2023)

Serial Skeletal Detection using a Kalman Filter in Combination with OpenPose. - Sota Sugiyama; Masataka Yamamoto; Hiroshi Takemura; Naoyuki Aikawa (ICEIC, 2024)

Detection of Circulating Tumor Cells in Blood Using Random Forest. - Hua Wei; Takahiro Natori; Tomohiro Tanaka; Shin Aoki; Takeshi Yamada; Naoyuki Aikawa (ICEIC, 2024)

Design Method of Effective Passband Flat Variable FIR Filters for Weight Measurement. - Toma Miyata; Yasunori Sugita; Naoyuki Aikawa (IECON, 2024)

Study on Non-Invasive Blood Glucose Monitoring Methods for Japanese Black Cattle. - Takahiro Natori; Kentaro Fujii; Yuka Kawatsu; Hisashi Nabenishi; Naoyuki Aikawa (MOCAST, 2024)

Analysis of Oscillation Components in Instantaneous Frequency Estimation by Finite Order 2-D Hilbert Transformer. - Jun Obara; Sena Hiruma; Naoyuki Aikawa (MWSCAS, 2024)

Improving Classification Accuracy in Paint Surface Inspection Using Image Processing and Deep Learning. - Motoki Sawada; Yuta Fuji; Naoyuki Aikawa (MWSCAS, 2024)