• Profile

Shoji Tominaga


Mailing Address:

Chiba University,
Graduate School of Advanced Integration Science

1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

TEL/FAX: +81-43-290-3486

E-mail


Educational History:

B.E., M.S., and Ph.D. degrees in electrical engineering from Osaka University, Toyonaka, Osaka, Japan, in 1970, 1972, and 1975, respectively.


Professional History:

2013- presentSpecially Appointed Researcher, Graduate School of Advanced Integration Science, Chiba University
2011- 2013Dean, Graduate School of Advanced Integration Science, Chiba University
2007- 2013Professor, Dept. of Information Science, Graduate School of Advanced Integration Science, Chiba University
2006-2007Professor, Dept. of Information and Image Sciences, Faculty of Engineering, Chiba University
2003-2005Dean, Faculty of Information Science and Arts, and
Member of the board of trustees, Osaka Electro-Communication University, Osaka
1995-2006Professor, Dept. of Engineering Informatics, Osaka Electro-Communication University, Osaka
1987-1988Visiting Scholar, Dept. of Psychology, Stanford University
1986-1995Professor, Dept. of Precision Engineering, Osaka Electro-Communication University, Neyagawa, Osaka,
1978-1986Associate Professor, Dept. of Precision Engineering, Osaka Electro-Communication University, Neyagawa, Osaka,
1976-1978Lecturer, Dept. of Precision Engineering, Osaka Electro-Communication University, Neyagawa, Osaka,

Technical Accomplishment

Shoji Tominaga has made several important contributions to color image science and technology. His contributions, spanning more than thirty years, range from the fundamentals of color imaging to its computer image applications. He has contributed in particular the interaction of light with materials, color constancy, illuminant estimation, and spectral imaging.


Importance Contributions

1. Interaction of light with materials:

1.1 Dichromatic reflection model

In 1989 Tominaga analyzed the surface-spectral reflectance functions of inhomogeneous dielectric materials while collaborating with Professor Wandell (Stanford University). They evaluated what was then a novel model of reflectance, the dichromatic reflection model for inhomogeneous materials, and they developed an algorithm for testing its adequacy in the case of any object surface occurring in natural scenes. This dichromatic model and their work on algorithms have received broad recognition and have been useful in color engineering and computer vision. The main publication (JOSA, 1989) was cited by 150 other authors.


1.2 3D light reflection measurement and modeling

Tominaga has worked on the problem of estimating the three-dimensional scattering of light from a surface. He developed a solution, which has the great advantage that various parameters of the reflection model can be obtained from a single color image taken by a digital camera (IEEE CG&A, 2002). Recently he developed a gonio-spectral imaging system for measuring light reflection on an object surface (IEICE, 2005). This system uses two robot arms, a multi-band lighting system, and a monochrome digital camera. It can allow four degrees of freedom in incident and viewing angles necessary for full parametrization of a reflection model function.


2. Color constancy

Tominaga has conducted very significant studies on imaging systems and algorithms for realizing human color constancy, predicting color appearance, and recognizing objects. He demonstrated that object surfaces could be identified by means of the body component of the dichromatic reflection model (IEEE PAMI, 1991). He was the first in the world to develop a multichannel vision system to perform the important task of estimating surface and illuminant spectral functions that was not possible with ordinary RGB color imaging (JOSA, 1996). This vision system had six sensors. He has continued the works on algorithm improvement and system realization as a multispectral imaging system (JEI, 1999). The multispectral imaging provides numerous applications, including object recognition (MGV 2002) and color appearance prediction.


3. Illuminant estimation

Tominaga has made important contributions to the work on illumination classification (JOSA, 2001, Proceedings IEEE, 2002). This is a problem with significant application to digital cameras, in which it is essential to form an estimate of the illumination before rendering the camera data. The illuminant classification algorithm is known as the Sensor Correlation Method and it serves to measure a relationship between camera sensor outputs and illuminant color temperature (JEI, 2002). This method has proven to be effective for estimating illuminant color temperature in natural scenes and for accurate rendering of color images. Recently, he is devoted to estimating a spatial distribution of light sources by omnidirectional observations. He developed a technique for estimating the omnidirectional distribution of the scene illuminant spectral-power distribution from images taken by a camera aimed at a mirrored ball (JIST 2006). This technique is a wide range of applications in optics, photonics, imaging, and computer graphics.


4. Digital color image processing and rendering

Tominaga has developed numerous algorithms for digital color image processing and rendering. The color conversion algorithm using Neural Networks (CRA 1993) realizes an effective nonlinear mapping between any color coordinate systems, which has significant merits in conversion accuracy, memory capacity, and computation time. So the basis algorithm was successfully applied to color control of printers (JEI 1998) and projectors (EI 2005) for color image reproduction. Recently he has made new contributions to digital archiving of art paintings (OE Magazine 2003). He has proposed a new approach called "viewpoint and illumination-independent digital archiving," which solves the problem from a global point of view, differently from the previous approach "viewpoint and illumination-specific digital archiving." The technique is based on the combined studies of image acquisition, processing, and rendering. He has developed spectral imaging system of HDR images, algorithms for estimating surface properties of paintings and data compression (JSID 2007), and systems for rendering realistic images with human color perception.


5. Spectral imaging

Tominaga has developed a variety of multi-spectral imaging systems. The conventional systems are mostly constructed by multi-bnad imaging devices with different filtration mechanism, such as (1) using one or two addtional color filters to a tichromatic digital camera (IS&T, 2008), (2) combining a monochrome camera and color filters with different spectral bands (JOSA, 1996), (3) using narrow band interference filters (AIC, 2009), and (4) using a LCT filter to a monochromatic camera (JEI, 1999). Recently, he has proposed a spectral imaging technology using an active spectral illumination for solving shortcomings of the conventional systems and finding effective applications in a variety of fields including color engineering, computer vision, and imaging industry (JOSA, 2012).


Publications

List of Recent Major Journal Publications

S. Tominaga and T. Horiuchi: Spectral imaging by synchronizing capture and illumination, Journal of Optical Society of America A, Vol. 29, No.9, pp.1764-1775, 2012

A. Ibrahim, S. Tominaga and T. Horiuchi: Invariant Representation for Spectral Reflectance Images and Its Application, EURASIP Journal on Image and Video Processing, Vol.2011, 2011.

S. Tominaga, A. Matsuura and T. Horiuchi: Spectral Analysis of Omnidirectional Illumination in a Natural Scene, Journal of Imaging Science and Technology, Vol.54, No.4, pp. 040502-1 - 040502-9, 2010.

A. Ibrahim, S. Tominaga and T. Horiuchi: A Spectral Imaging Method for Material Classification and Inspection of Printed Circuit Boards, Optical Engineering, Vol.49, No.5, pp.057201-1 - 057201-10, 2010.

Shoji Tominaga: Material Classification Method for Printed Circuit Boards using a Spectral Imaging System, Machine Graphics & Vision, Vol.18, No.2, pp.233-250, 2009.

S. Tominaga and Y. Moriuchi: Principal Component Analysis-Based Reflectance Analysis/Synthesis of Cosmetic Foundation, Journal of Imaging Science and Technology, Vol.53, No.6, pp.060403.1-060403.8, 2009.

S. Tominaga and N. Tanaka: Spectral Image Acquisition, Analysis, and Rendering for Art Paintings, Journal of Electronic Imaging, Vol. 17, No. 4, pp.043022-1-13, Dec. 2008.

S. Tominaga and A. Kimachi: Polarization Imaging for Material Classification, Optical Engineering, Vol.47, No.12, pp.123201-1-14, Dec. 2008.

T. Horiuchi and S. Tominaga: Color Image Coding by Colorization Approach, Eurasip Journal on Image and Video processing, Volume 2008, Article ID 158273, 9 pages, 2008.

S. Tominaga, T. Fukuda, and A. Kimachi: A High-resolution Imaging System for Omnidirectional Illuminant Estimation, Journal of Imaging Science and Technology, Vol. 52, No.4, 040907-040907-9, July/August 2008.

T. Horiuchi, F. Nohara, and S. Tominaga: Semi-Invariant Reversible Mapping from Color to Gray Journal of Imaging Science and Technology, Vol. 52, No.4, 040903-040903-9, July/August 2008.

T. Horiuchi, and S. Tominaga: Color Image Coding by Colorization Approach, Eurasip Journal on Image and Video processing, Volume 2008, Article ID 158273, 9 pages, 2008.

L. Wang, T. Horiuchi, H. Kotera and S. Tominaga: HDR Image Compression and Evaluation based on Local Adaptation Using Retinal Model, Journal of the Society for Information Display (JSID), Vol.15, No.9, pp.731-739, Sep. 2007.

A. Kimachi, N. Tanaka, and S. Tominaga: Development and Calibration of a Gonio-Spectral Imaging System for Measuring Surface Reflection, IEICE Transactions on Information and Systems, Vol.E89-D, No.7, pp.1994-2003, July 2006.

S. Tominaga and N. Tanaka: Omnidirectional Scene Illuminant Estimation Using a Mirrored Ball (Feature Article), Journal of Imaging Science and Technology, Vol.50, No.3, pp.217-227, May-June, 2006.

M. Doi, N. Tanaka, and S. Tominaga: Spectral Reflectance Estimation of Human Skin and Its Application to Image Rendering, Journal of Imaging Science and Technology, Vol.49, No.6, pp.474-482, Nov./Dec. 2005.

S. Tominaga and N. Tanaka: Refractive Index Estimation and Color Image Rendering, Pattern Recognition Letters, Vol.24, No.11, pp.1703-1713, 2003.

S. Tominaga: Object Recognition Using a Multi-spectral Imaging System, Machine Graphics & Vision, Vol.11, No.2/3, pp.221-240, 2002.

S. Tominaga: Natural Image Database and Its Use for Scene Illuminant Estimation, Journal of Electronic Imaging, Vol. 11, No. 4, pp.434-444, Oct. 2002.

S. Tominaga and B.A. Wandell: Natural Scene Illuminant Estimation Using the Sensor Correlation, Proceedings of the IEEE, Vol.90, No.1, pp.42-56, Jan. 2002.

S. Tominaga, S. Ebisui, and B.A. Wandell: Scene illuminant classification -Brighter is Better-, Journal of Optical Society of America A, Vol. 18, No. 1, pp. 55-64, Jan. 2001.

S. Tominaga and N. Tanaka: Estimating Reflection Parameters from a Single Color Image, IEEE Computer Graphics and Applications, Vol.20, No.5, pp.58-66, 2000.

S. Tominaga: Spectral imaging by a multi-channel camera, Journal of Electronic Imaging, Vol. 8, No. 4, pp. 332-341, Oct. 1999.

S. Tominaga: Color Control of Printers by Neural Networks, Journal of Electronic Imaging, Vol. 7, No. 3, pp. 664-671, July 1998.

S. Tominaga: Dichromatic Reflection Models for Rendering Object Surfaces, Journal of Imaging Science and Technology, Vol.40, No.6, pp.549-555, Nov./Dec. 1996.

S. Tominaga: Multichannel vision system for estimating surface and illuminant functions, Journal of Optical Society of America A, Vol.13, No.11, pp. 2163-2173, November 1996.

S. Tominaga: Analysis of Object Color Images Using a Reflection Model, Journal of Image Information and Television Engineers, Vol.50, No.5, pp.577-585, May 1996.

S. Tominaga: Surface Reflectance Estimation by the Dichromatic Model, Color Research and Application, Vol. 21, No. 2, pp.104-114, April 1996.

S. Tominaga: Dichromatic Reflection Models for a Variety of Materials, Color Research and Application, Vol. 19, No. 4, pp.277 - 285, August 1994.

S. Tominaga: Color Notation Conversion by Neural Networks, Color Research and Application, Vol. 18, No. 4, pp.253 - 259, August 1993.

S. Tominaga: Color Classification of Natural Color Images, Color Research and Application, Vol. 17, No. 4, pp. 230-239, August 1992.

S. Tominaga: Surface identification using the dichromatic reflection model, IEEE Trans. Pattern Analysis and Machine Intelligence, Vol. 13, No. 7, pp. 658-670, July 1991.

S. Tominaga and B. Wandell: Component estimation of surface spectral reflectance, Journal of Optical Society of America A, Vol. 7, No. 2, pp.312-317, Feb. 1990.

S. Tominaga and B. Wandell: Standard reflectance model and illuminant estimation, Journal of Optical Society of America A, Vol. 6, No.4, pp. 576-584, April 1989.


Professional Society Activities

2012-presentLife Fellow Member, IEEE
2009-presentFellow Member, IEICE
2009-presentFellow Member, SPIE
2009-presentEditorial Board, Color Research and Application (Wiley)
2008-presentWorkshop Co-chair, Computational Color Imaging Workshop (CCIW09)
2007-2010Conference Co-Chair, Color Imaging Conference, SPIE-IS&T Electronic Imaging
2006Conference Co-Chair, SPIE Spectral Imaging: Eight International Symposium on Multispectral Color Science
2005-presentAssociate Editor, Journal of Electronic Imaging
2003-2007Program committee member, Color Imaging Conference, SPIE /IS&T Electronic Imaging
2007-2008Guest Editor, Special Issue on "Color in Image and Video processing," Eurasip Journal on Image and Video processing
2007-presentFellow Member, IS&T (Imaging Science and Technology)
2007Program Committee, Computational Color Imaging Workshop, Modena, Italy
2006-2008President, the Color Science Association of Japan
2005-2011Fellow Member, IEEE
2003Program Committee, IEEE Workshop on Color and Photometric Methods in Computer Vision
2002-2005Scientific Committee, the 10th Congress of AIC, Granada, Spain
2001-presentProgram Committee, IEEE Southwest Symposium on Image Analysis and Interpretation
2001-2004Program committee, European Conference on Colour in Graphics, Imaging and Vision
2001-2003Selected speaker, the IEEE Computer Society Distinguished Visitors Program in Asia-Pacific Region
2000-presentProgram Committee, International Conference on Computer Vision
2000-2007Chairman, the Visual Information Research Workshop in the Kansai Section of IPSJ
2000Program Committee, International Conference on Color in Graphics and Image Processing
1999Program Committee, IEEE International Conference on Image Processing
1996-2004Program Committee, CIC (Color Imaging Conference)
1996-1997Organizing Committee, the 8th Congress of AIC, Kyoto, Japan
1995-2010Editorial Board, Color Science Handbook (in Japanese)
1995-1999Technical Committee, Pattern Recognition and Media Understanding) in IEICE

Honors and Awards

2010IEEE SSIAI Award, "For technical contributions and service to IEEE Southwest Sym. Image Analysis & Interpretation."
2009Fellow of SPIE, "For contributions to specific achievements in electronic imaging."
2007Fellow of the IS&T (Society for Imaging Science and Technology, "For contribution to color imaging science, particularly the interaction of light with materials, color constancy, and illuminant estimation."
2005Fellow of the IEEE "For contributions to the analysis of physical phenomena in digital color imaging."
2002Recipient of SWFT Scientific Technology Award from the Suga Weathering Technology Foundation "For his research on foundations and applications of color image processing."
2001Named Selected speaker, the IEEE Computer Society Distinguished Visitors Program in Asia-Pacific Region
2000-2004Senior Member of the IEEE

Book Edited

1. R. Schettini, S. Tominag, and A. Tremeau: Computational Color Imaging, CCIW 2011, Milan, Italy, April 2011, Proceedings, Springer Lecture Notes in Computer Science (LNCS) 6626, 2011.

2. R. Eschbach, G.G. Marcu, S. Tominaga, A. Rizzi: Color Imaging XV: Displaying, Processing, Hardcopy, and Applications, SPIE Proceedings, Vol. 7528, 2010.

3. A. Tremeau, R. Schettini, and S. Tominaga: Computational Color Imaging, CCIW 2009 Revised Selected Papers, Springer Lecture Notes in Computer Science (LNCS) 5646, 2009.

4. R. Eschbach, G.G. Marcu, S. Tominaga: A. Rizz: Color Imaging XIV: Displaying, Processing, Hardcopy, and Applications, SPIE Proceedings, Vol.7241, 2009.

5. R. Eschbach, G.G. Marcu, and S. Tominaga: Color Imaging XIII: Processing, Hardcopy, and Applications, SPIE Proceedings, Vol. 6807, 2006

6. M.R. Rosen, F.H. Imai, and S. Tominaga: Spectral Imaging, SPIE Proceedings, Vol. 6062, 2006

7. CAJ and S. Tominaga: Color Science Handbook (in Japanese), University of Tokyo Press, 1999