Masahiro OKUDA


Weight Optimization for Multiple Image Integration and Its Applications
Ryo MATSUOKA Tomohiro YAMAUCHI Tatsuya BABA Masahiro OKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/01/01
Vol. E99-D  No. 1  pp. 228-235
Type of Manuscript:  PAPER
Category: Image Processing and Video Processing
Keyword: 
denoisingconvex optimizationhigh dynamic range imagessuper-resolution
 Summary | Full Text:PDF(1.7MB)

White Balancing by Using Multiple Images via Intrinsic Image Decomposition
Ryo MATSUOKA Tatsuya BABA Mia RIZKINIA Masahiro OKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2015/08/01
Vol. E98-D  No. 8  pp. 1562-1570
Type of Manuscript:  PAPER
Category: Image Processing and Video Processing
Keyword: 
white balanceintrinsic imagedecompositionsparsityflash imagel0 norm
 Summary | Full Text:PDF(4MB)

Quality Evaluation of Decimated Images Using Visual Difference Predictor
Ryo MATSUOKA Takao JINNO Masahiro OKUDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/08/01
Vol. E96-A  No. 8  pp. 1824-1827
Type of Manuscript:  LETTER
Category: Image
Keyword: 
quantitative evaluationdecimationinterpolationvisual difference predictor
 Summary | Full Text:PDF(912.1KB)

Watermarking for HDR Image Robust to Tone Mapping
Xinwei XUE Takao JINNO Xin JIN Masahiro OKUDA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2334-2341
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Image Processing
Keyword: 
HDR imagewatermarkingtone mappingµ-Lawbilateral filtering
 Summary | Full Text:PDF(5.4MB)

A Study on Weighting Scheme for Rational Remez Algorithm
Takao JINNO Yusuke SAITO Masahiro OKUDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/04/01
Vol. E94-A  No. 4  pp. 1144-1147
Type of Manuscript:  LETTER
Category: Digital Signal Processing
Keyword: 
IIR digital filterthe rational Remez algorithmripple ratio
 Summary | Full Text:PDF(155.8KB)

µ-Law Based HDR Coding and Its Error Analysis
Takao JINNO Hironori KAIDA Xinwei XUE Nicola ADAMI Masahiro OKUDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/03/01
Vol. E94-A  No. 3  pp. 972-978
Type of Manuscript:  PAPER
Category: Image
Keyword: 
HDRIcodingtone mapping model
 Summary | Full Text:PDF(1.3MB)

High Contrast HDR Video Tone Mapping Based on Gamma Curves
Takao JINNO Kazuya MOURI Masahiro OKUDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/02/01
Vol. E94-A  No. 2  pp. 525-532
Type of Manuscript:  Special Section PAPER (Special Section on Image Media Quality)
Category: Processing
Keyword: 
tone mappinghigh dynamic range imagegamma blending
 Summary | Full Text:PDF(3MB)

JPEG Compatible Raw Image Coding Based on Polynomial Tone Mapping Model
Masahiro OKUDA Nicola ADAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2928-2933
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Image Coding
Keyword: 
raw imagecompressionpolynomial approximation
 Summary | Full Text:PDF(543.4KB)

Design of Equiripple Minimum Phase FIR Filters with Ripple Ratio Control
Masahiro OKUDA Masaaki IKEHARA Shin-ichi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/03/01
Vol. E89-A  No. 3  pp. 751-756
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
FIR filterminimum phaseripple ratiobandpass filters
 Summary | Full Text:PDF(292.3KB)

Simultaneous Approximation for Magnitude and Phase Responses of FIR Digital Filters
Masahiro OKUDA Masahiro YOSHIDA Masaaki IKEHARA Shin-ichi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/11/01
Vol. E87-A  No. 11  pp. 2957-2963
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
FIR filterscomplex Chebyshev approximationleast squares method
 Summary | Full Text:PDF(774.2KB)

Design of FIR Digital Differentiators Using Maximal Linearity Constraints
Ishtiaq Rasool KHAN Masahiro OKUDA Ryoji OHBA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/08/01
Vol. E87-A  No. 8  pp. 2010-2017
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Filter Design
Keyword: 
maximally linearMAXFLATdigital differentiatorsfullbanddigital filters
 Summary | Full Text:PDF(514.3KB)

Progressive Geometry Coding of Partitioned 3D Models
Masahiro OKUDA Shin-ichi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2003/11/01
Vol. E86-D  No. 11  pp. 2418-2425
Type of Manuscript:  PAPER
Category: Man-Machine Systems, Multimedia Processing
Keyword: 
3D modelsgeometry codingmodel partitioningcompression
 Summary | Full Text:PDF(857.1KB)

Measuring Errors on 3D Meshes Using Pixel Based Search
Kohji INAGAKI Masahiro OKUDA Masaaki IKEHARA Shin-ichi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2003/09/01
Vol. E86-D  No. 9  pp. 1903-1908
Type of Manuscript:  PAPER
Category: Computer Graphics
Keyword: 
measuring errors3D meshes2-dimensional search
 Summary | Full Text:PDF(534.3KB)

Analysis of Phase-Inversion Waves in Coupled Oscillators Synchronizing at In-and-Anti-Phase
Masayuki YAMAUCHI Masahiro OKUDA Yoshifumi NISHIO Akio USHIDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/07/01
Vol. E86-A  No. 7  pp. 1799-1806
Type of Manuscript:  PAPER
Category: Nonlinear Problems
Keyword: 
coupled oscillatorsphase differencephase-inversion wavesin-and-anti-phase synchronization
 Summary | Full Text:PDF(1.4MB)

Compression of 3D Models by Remesh on Texture Images
Masahiro OKUDA Kyoko NAGATOMO Masaaki IKEHARA Shin-ichi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2003/06/01
Vol. E86-D  No. 6  pp. 1110-1115
Type of Manuscript:  PAPER
Category: Computer Graphics
Keyword: 
3D modelcompressionregular meshtexture
 Summary | Full Text:PDF(1.2MB)

Filter Banks with Nonlinear Lifting Steps for Lossless Image Compression
Masahiro OKUDA Sanjit K. MITRA Masaaki IKEHARA Shin-ichi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/03/01
Vol. E84-A  No. 3  pp. 797-801
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
filter bankliftinglossless image compression
 Summary | Full Text:PDF(373.8KB)

Design of Biorthogonal Filter Banks Composed of Linear Phase IIR Filters
Masahiro OKUDA Masaaki IKEHARA Shin-ichi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/11/25
Vol. E81-A  No. 11  pp. 2449-2454
Type of Manuscript:  PAPER
Category: Neural Networks
Keyword: 
IIR filter bankslinear phase responsenoncausal filteringwavelet image conding
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Simultaneous Approximation for IIR Digital Filters with Log Magnitude and Phase Response
Masahiro OKUDA Masaaki IKEHARA Shin-ichi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/11/25
Vol. E79-A  No. 11  pp. 1879-1885
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
IIR digital filterlog magnitude responsesteepest decent methodrobust algorithm
 Summary | Full Text:PDF(438.6KB)

Tunneling Time Calculation for Double-Barrier Quantum Well with Trapezoidal Potential Profile
Hirokazu INABA Kou KUROSAWA Masahiro OKUDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1991/05/25
Vol. E74-C  No. 5  pp. 1310-1313
Type of Manuscript:  PAPER
Category: Semiconductor Materials and Devices
Keyword: 
 Summary | Full Text:PDF(343.4KB)