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1993 Fiscal Year Final Research Report Summary

Recognition of Objects Using Color Reflection Models

Research Project

Project/Area Number 04680039
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Informatics
Research InstitutionOsaka Electro-Communication University

Principal Investigator

TOMINAGA Shouji  Osaka Electro-Communication University, Faculty of Engineering, Professor, 工学部, 教授 (10103342)

Co-Investigator(Kenkyū-buntansha) NOBORIO H.  Osaka Electro-Communication University, Faculty of Engineering, Associate Profes, 工学部, 助教授 (10198616)
Project Period (FY) 1992 – 1993
Keywordsobject recognition / color / reflection model / interreflection / highlight / region segmentation / color reproduction / object color
Research Abstract

1. Color classification of color images and region segmentation
A color classification method is presented to partition a color image into a set of uniform color regions. The CIE-L^<**>a^<**>b^<**> color space is used as an approximately uniform perceptual color space. Colors used to represent a natural color image are classified by means of cluster detection in the color space. We have presented an algorithm for sequential detection of color clusters and region segmentation. The performance is discussed in an experiment.
2. Analysis of Interreflection Using a Color Reflection Model
A method is presented for analyzing interreflection between two matte surfaces by using a color reflection model. The reflected light from surfaces is described as a dichromatic reflection model consisting of two components of common interreflection and inherent diffuse reflection to each surface. We have generalized the color space analysis for the precise analysis of spectra and the practical analysis of ima … More ges. The feasibility of our analysis method is demonstrated in an experiment using two color papers.
3. Analysis of Color Images for Inhomogeneous Objects
Highlights and mirror-like interreflections are often observed from the smooth surfaces of plastics. We have presented an analysis method of an image for multiple inhomogeneous objects based on a color reflection model. First, we developed an algorithm for computing the color vector of a light source from highlight regions in an image. Next, interreflection between two surfaces was modeled to estimate object colors from the measured image. A relative chromaticity coordinate system is proposed, and a procedure is devised for determining the chromaticity of object colors.
4. Realistic Production of Object Color in a 3D Space and its Evaluation
A method is considered for realistic production of object color of a 3D object on a color monitor. We have two problems of the color reproduction, and the realization of 3D light reflection. A coordinate transformation and lookup tables are used for the former. For the latter we have shown light reflection models and a computational method of spectral reflectances. A rendering algorithm is presented on spectral computation, and the overall performance is evaluated on experiment. Less

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 富永昌二: "Color Classification of Natural Color Images" Color Research and Application. 17. 230-239 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 富永昌二: "カラー反射モデルを用いた相互反射の解析" 情報処理学会論文誌. 34. 302-311 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 富永昌二: "3次元空間における物体色のリアルな生成とその評価" 情報処理学会論文誌. 34. 289-301 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 富永昌二,今村淳志: "複数の不均質物体に対するカラー画像の解析" 情報処理学会論文誌. 35. 79-91 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 登尾啓史: "A Sufficient Condition for Designing a Family of Sensor-based Deadlock-free Path-planning Algorithms" Journal of Advanced Robotics. 7. 413-433 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Tominaga: "Color Classification of Natural Color Images." Color Research and Application. Vol.17. 230-239 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Tominaga: "Analysis of Interreflection Using a Color Reflection Model" Trans.of Information Processing Society of Japan. Vol.34. 302-311 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Tominaga: "Realistic Production of Object Color in a Three-Dimensional Space and Its Evaluation" Trans.of Information Processing Society of Japan. Vol.34. 289-301 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Tominaga, A.Imamura: "Analysis of Color Images for Multiple Inhomogeneous Object." Trans.of Information Processing Society of Japan. Vol.35. 79-91 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Noborio: "A Sufficient Condition for Designing a Family of Sensor-based Deadlock-free Path-planning Algorithms." Journal of Advanced Robotics. Vol.7. 413-433 (1993)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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