Keita HIRAI


Psychological Effects of Ambient Illumination Control and Illumination Layout While Viewing Various Video Images
Takuya IWANAMI Ayano KIKUCHI Keita HIRAI Toshiya NAKAGUCHI Norimichi TSUMURA Yoichi MIYAKE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/02/01
Vol. E94-A  No. 2  pp. 493-499
Type of Manuscript:  Special Section PAPER (Special Section on Image Media Quality)
Category: Vision
Keyword: 
display deviceilluminationsubjective evaluationsemantic differential (SD) methodfactor analysis
 Summary | Full Text:PDF(1.7MB)

Video Quality Assessment Using Spatio-Velocity Contrast Sensitivity Function
Keita HIRAI Jambal TUMURTOGOO Ayano KIKUCHI Norimichi TSUMURA Toshiya NAKAGUCHI Yoichi MIYAKE 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/05/01
Vol. E93-D  No. 5  pp. 1253-1262
Type of Manuscript:  PAPER
Category: Image Processing and Video Processing
Keyword: 
objective video quality assessmentspatio-velocity contrast sensitivity functionimage diffrencesubjective evaluationrank order correlation coefficient
 Summary | Full Text:PDF(1.6MB)

Adaptive Ambient Illumination Based on Color Harmony Model
Ayano KIKUCHI Keita HIRAI Toshiya NAKAGUCHI Norimichi TSUMURA Yoichi MIYAKE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/12/01
Vol. E92-A  No. 12  pp. 3372-3375
Type of Manuscript:  Special Section LETTER (Special Section on Image Media Quality)
Category: Color
Keyword: 
displayilluminationsubjective evaluationfactor analysiscolor harmony
 Summary | Full Text:PDF(223KB)