• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

High-fidelity reproduction of night townscape images based on visual characteristics

Research Project

Project/Area Number 17K00254
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Perceptual information processing
Research InstitutionOsaka Electro-Communication University

Principal Investigator

Nishi Shogo  大阪電気通信大学, 情報通信工学部, 准教授 (70411478)

Project Period (FY) 2017-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords低照度環境 / 視覚特性 / 画像再現 / 分光情報 / 夜間景観 / 輝度分布画像 / 画像の見えモデル / スマートフォン / スペクトルカメラ / スマートフォンカメラ / ハイダイナミックレンジイメージング / 網膜応答モデル / 分光強度分布 / 色変換行列 / 分光分布 / 分光計測 / 色再現
Outline of Final Research Achievements

In this project, we aimed to reproduce nighttime landscape images based on visual characteristics using an image visibility model. In addition, we also developed a method for acquiring spectral information under low-light conditions, because we believe that providing high-fidelity scene images to the visibility model contributes to high-fidelity reproduction. HDR imaging is considered to be suitable for image acquisition in low-light environments. In image reproduction based on visual characteristics, we improved the defects of conventional methods and performed image reproduction for a large number of HDR images, not limited to night townscapes. The obtained images were classified according to the brightness of the scene and subjectively evaluated, and good evaluations were obtained. The night townscape images could be reproduced with high fidelity for real scenes.

Academic Significance and Societal Importance of the Research Achievements

低照度環境下での分光情報の獲得手法を確立すること,またダイナミックレンジの観点,ならびに照度レベルによる視覚系の応答特性の変化という生理的観点からも,従来の昼光環境下での計測と再現に比べ,困難な課題に取り組む点において意義があったと考えられる。本課題への取り組みにより夜間景観の形成・整備の一助となる手法を示したが,低照度環境下での色覚シミ ュレーションへの応用が可能であるため,薄明視や暗所視環境下における安全性シミュレーションへの応用も考えられる。また見えの予測モデルの構築により,オンライン商取引やデジタルア ーカイブ,遠隔医療などの実社会への貢献も期待できる。

Report

(7 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (5 results)

All 2022 2021 2019 2018

All Presentation (5 results) (of which Int'l Joint Research: 3 results)

  • [Presentation] Improvement of the multispectral measurement system for digital archiving of art paintings2022

    • Author(s)
      Shogo NIshi, Motonori Doi, Akira Kimachi
    • Organizer
      25th Congress of the International Commission for Optics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Estimating spectral sensitivities of a smartphone camera2021

    • Author(s)
      Shoji Tominaga, Shogo Nishi, Ryo Ohtera
    • Organizer
      Electronic Imaging 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Improving the Appearance of HDR Images Based on Visual Characteristics2019

    • Author(s)
      Shogo NISHI, Takuto KANOZAKA
    • Organizer
      AIC 2019 Midterm Meeting: Color and Landscape
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 視覚特性に基づいた夜間シーンの見えの改善2018

    • Author(s)
      片野坂拓人, 西省吾
    • Organizer
      第35回センシングフォーラム 計測部門大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 視覚特性に基づいた景観画像の階調制御2018

    • Author(s)
      片野坂拓人, 西省吾
    • Organizer
      平成30 年度日本色彩学会関西支部大会
    • Related Report
      2018 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi