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

Smartphone-Based Multiband Imaging and Application to Appearance Editing

Research Project

Project/Area Number 20K11877
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 61010:Perceptual information processing-related
Research InstitutionKobe Institute of Computing / Graduate School of Information Technology

Principal Investigator

Ohtera Ryo  神戸情報大学院大学, 情報技術研究科, 准教授 (50590410)

Co-Investigator(Kenkyū-buntansha) 富永 昌二  長野大学, 企業情報学部, 研究員 (10103342)
西 省吾  大阪電気通信大学, 情報通信工学部, 准教授 (70411478)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsマルチバンドイメージング / 分光計測 / 分光画像
Outline of Research at the Start

近年,分光画像の必要性がコンピュータビジョン研究をはじめ多くの分野で高まっている.その一方で,分光画像取得のための機器のコストや可搬性には問題が残されていた.
そこで本研究では,スマートフォンと小型のLEDリングアレイ型照明を組み合わせることで,より手軽に対象の分光情報を獲得する携帯型マルチバンドイメージングシステムの開発を目的とする.また,スマートフォンの演算能力の向上は近年目覚ましいため,その携帯性と演算能力を生かした有用な応用分野を開拓する.その一つとして,分光イメージレンダリングをスマートフォン上で行う.

Outline of Final Research Achievements

In this study, we prototyped a multi-band imaging system using smartphones.
First, we constructed a spectral sensitivity database for the cameras of 20 commercially available smartphone models. The obtained spectral sensitivity database is available at https://ohlab.kic.ac.jp/. Next, as an active light source, we prototyped a compact 7-color LED light source system using high-brightness LEDs and the Arduino. Finally, we proposed a new spectral reflectance estimation method based on linear calculations and confirmed its effectiveness by analyzing images captured using the constructed LED light source system.

Academic Significance and Societal Importance of the Research Achievements

取得する機材の価格や可搬性の低さから,分光情報の実用的価値が認められにくいという大きな問題が背景として存在していたが,本研究の成果は,広く普及しているスマートフォンと,安価なLED照明によって容易かつ気軽に分光画像情報を取得できる第一歩となったと考える.また,取得された分光情報は,農業や医療,芸術など,一般的かつ実用的な用途への幅広い応用が期待できるため,スマートフォンという身近な機器とのシナジーによって,社会的にも大きなインパクトを持つと考えている.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Improved method for spectral reflectance estimation and application to mobile phone cameras2022

    • Author(s)
      Tominaga Shoji、Nishi Shogo、Ohtera Ryo、Sakai Hideaki
    • Journal Title

      Journal of the Optical Society of America A

      Volume: 39 Issue: 3 Pages: 494-494

    • DOI

      10.1364/josaa.449347

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Measurement and Estimation of Spectral Sensitivity Functions for Mobile Phone Cameras2021

    • Author(s)
      Tominaga Shoji、Nishi Shogo、Ohtera Ryo
    • Journal Title

      Sensors

      Volume: 21 Issue: 15 Pages: 4985-4985

    • DOI

      10.3390/s21154985

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Spectral Reflectance Estimation with Smoothness Constraint2022

    • Author(s)
      Shoji Tominaga, Shogo Nishi, Ryo Ohtera, Hideaki Sakai
    • Organizer
      The 30th Color and Imaging Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スマートフォンカメラによるマルチバンドイメージング2022

    • Author(s)
      西 省吾, 大寺 亮, 富永 昌治
    • Organizer
      日本色彩学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Estimating Spectral Reflectances Using Mobile Phone Cameras2022

    • Author(s)
      Tominaga Shoji、Nishi Shogo、Ohtera Ryo
    • Organizer
      Proc, IS& T/SPIE Symposium on Electronic Imaging
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Estimating Spectral Sensitivities of a Smartphone Camera2021

    • Author(s)
      S. Tominaga, S. Nishi, R. Ohtera
    • Organizer
      IS& T/SPIE Symposium on Electronic Imaging
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2020-04-28   Modified: 2024-12-25  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi