Thai Version

Dr. Joewono Widjaja
Professor

Contact address:

School of Laser Technology and Photonics
Institute of Science
Suranaree University of Technology
Nakhon Ratchasima 30000, Thailand
Tel: (+66)-44-224187, Fax: (+66)-44-224185
Email: widjaja@sut.ac.th

Education:

1986 : B.Eng. (Electronic), Satya Wacana Christian University, Indonesia
1991 : M.Eng. (Electronic), Hokkaido University, Japan
1994 : D.Eng. (Electronic), Hokkaido University, Japan

Awards:

  1987 - 1994 : Monbusho Scholarship
  1991 : Asami Award, Hokkaido University
  1999 : STA Fellowship, Japan Science and Technology Corporation
  2008 : Galileo Galilei Award, International Commission for Optics

Employment:

 

1994 - 1995

:

 Research Associate, Electronics Engineering Department, University of Electro- Communication, Tokyo, Japan
  1995 - 1996 : Post Doctoral Research Fellow, School of Applied Science, Nanyang Technological University, Singapore
  1997 - 1998 : Lecturer, School of Laser Technology and Photonics
  1998 - 2001 : Assistant Professor, School of Laser Technology and Photonics
  2001 - 2007 : Associate Professor, School of Laser Technology and Photonics
  2007 - Date : Professor, School of Laser Technology and Photonics

Research interest:

1. Analysis of digital in-line particle holograms
2. Optical information processing by using image compression
3. Wavelet optics

Publications:

A. Peer-reviewed papers

  1. J. Widjaja and Y. Tomita, "Optical wavelet-matched filtering by four-wave mixing in photorefractive media," Opt. Commun. 117, pp. 123-126 (1995).
  2. J. Widjaja and Y. Tomita,"Optical triple-in digital logics using non-linear optical four-wave mixing," Appl. Opt. 34, pp. 5074-5076 (1995).
  3. J. Widjaja, Y. Tomita, and A. Wahab, "Application of wavelet-matched filters to holographic associative memories," Opt. Commun. 132, 217-220 (1996).
  4. J. Widjaja and Y. Tomita, "Particle-image velocimetry using wavelet-matched filters," J. Mod. Opt. 43, 1993-1997 (1996).
  5. J. Widjaja, "Spatial-angular multiplexed 3-d holographic memory using zone plates and 1- d grating," Opt. Mem. Neural Net. 6, pp. 125-127 (1997).
  6. J. Widjaja, "Automatic holographic particle sizing using wavelet-based joint transform correlator", Optik 107, pp. 132-134 (1998).
  7. J. Widjaja, J. Uozumi, and T. Asakura, "Real-time specklegram analysis using wavelet-matched filters, " Asian J. Phys. 7, pp. 37-41 (1998).
  8. J. Widjaja and S. Jutamulia, "Use of wavelet analysis for improving autofocusing capability," Opt. Commun. 151, pp. 12-14 (1998).
  9. J. Widjaja, "Dynamic optical processing of 2-D wavelet transforms," Opt. Mem Neural Net. 8, pp. 75-79 (1999).
  10. J. Widjaja, "Wavelet transform for autofocusing detection systems," Sci. Asia 26, pp. 111-114, (2000).
  11. J. Widjaja, N. Wada, Y. Ishii, and W. Chujo, "Photonic packet address processor using holographic correlator," Elect. Lett. 37, pp. 703-704 (2001).
  12. J. Widjaja, "IP router using optical address recognition with second-harmonic generator," Elect. Lett. 38, pp. 1268-1270 (2002).
  13. S. Soontaranon, J. Widjaja, and T. Asakura, "Direct analysis of in-line particle holograms by using wavelet transform and envelope reconstruction method," Optik 113, pp. 489-494 (2002).
  14. J. Widjaja, "Spectral-hologram-based correlator for photonic IP router: Architectural Considerations," Opt. Eng. 42, pp. 747-752 (2003).
  15. J. Widjaja, "Effects of image compression on digital specklegrams," in Special Issue: Trends in Digital Speckle Pattern Interferometry, Opt. Lasers Eng. 39, pp. 501-506 (2003).
  16. J. Widjaja, "Wavelet transform correlator," in Encyclopedia of Optical Engineering, R.G. Driggers, Eds., pp. 2993 - 2999, Marcel Dekker, New York (2003).
  17. J. Widjaja and U. Suripon, “Real-Time Joint Transform Correlator by Using Compressed Reference Images”, Opt. Eng. 43, pp. 1737-1745 (2004).
  18. H. Hui, F.J. Song, J. Widjaja, and J.H. Li, “ANFIS-Based Fingerprint-Matching Algorithm”, Opt. Eng. 43, pp. 1814-1819 (2004).
  19. S. Soontaranon, J. Widjaja, and T. Asakura, “Improved holographic particle sizing by using absolute values of the wavelet transform,” Opt. Commun 240, pp. 253-260 (2004).
  20. J. Widjaja and U. Suripon, "Multiple-target detection by using joint transform correlator with compressed reference images," Opt. Commun. 253, pp. 44-55 (2005).
  21. J. Widjaja, “Objective evaluation of information retrieved from digitally-compressed in-line holograms,” Opt. Lasers Eng. 44, pp. 1239-1251 (2006).
  22. J. Widjaja and U. Suripon, “Experimental verifications of joint transform correlator using compressed reference images,” Appl. Opt. 45, pp. 8074-8082 (2006).
  23. P. Kaewkasi, J. Widjaja and J. Uozumi, “Effects of threshold on single-target detection by using modified amplitude-modulated joint transform correlator,” Opt. Commun. 271, pp. 48-58 (2007).
  24. J. Widjaja, “Detection performance of wavelet-based joint transform correlation,” Appl. Opt. 46, pp. 8278-8283 (2007).
  25. P. Kaewkasi, J. Widjaja and J. Uozumi, "Effects of threshold on multiple-target detection by using a modified amplitude-modulated joint transform correlator," Opt. Eng. 47, 017206 (2008).
  26. S. Soontaranon, J. Widjaja and T. Asakura, "Extraction of object position from in-line holograms by using single wavelet coefficient," Opt. Commun. 281, pp. 1461-1467 (2008).
  27. J. Widjaja and P. Raweng, "Image Reconstruction from In-Line Fresnel Holograms By Using Coherent Background Elimination," Opt. Mem. Neural Net. 17, pp. 23-19 (2008).
  28. P. Kaewkasi, J. Widjaja and J. Uozumi, "Modified joint transform correlator by using smoothed amplitude-modulated filter,"Opt. Eng. 47, 077203 (2008).
  29. J. Widjaja and S. Soontaranon, "All wavelet analysis of in-line particle holograms," Opt. Laser Eng. 47, pp. 1325-1333 (2008).
  30. S. Soontaranon and J. Widjaja, "Quality of images decrypted from in-line holographic encryption of images," Opt. Laser Eng. 48, 69-74. (2010).

B. Proceedings

  1. J. Widjaja and Y. Tomita, "Real-time wavelet-matched filtering using photorefractive four-wave mixing," Proc. SPIE 2529 (Photorefractive fiber and crystal devices: Materials, Optical properties, and Applications), 285-289 (1995).
  2. J. Widjaja and Y. Tomita, "Optical combinatorial digital logics using photorefractive four-wave mixing," ICO Technical Digest I (International Topical Meeting on Optical Computing), pp. 152-153 (1996).
  3. J. Widjaja, A. Wahab, and Y. Tomita, "Holographic associative memory using wavelet-matched filters," Proc. SPIE 2778 (ICO XVII: Optics for Science and New Technology), pp. 439-440 (1996).
  4. J. Widjaja and A. Wahab, "Optical associative memory using wavelet transform," Proc. SPIE 2904 Photonics East '96 (Intelligent Robots and Computer Vision XV: Algorithms, Techniques, Active Vision, and Materials Handling), pp. 250-255 (1996).
  5. J. Widjaja and S. Jutamulia, "Wavelet transform-based autofocus camera systems," Proc. IEEE (Asia-Pacific Conference on Circuits and Systems), pp. 49-51 (1998).
  6. J. Widjaja, "Particle sizing and tracking using wavelet transform," Proc. SPIE 3749 (ICO XVIII: Optics for the Next Millenium), pp. 781-782 (1999).
  7. J. Widjaja, "Effects of image compression on digital specklegrams," Proc. SPIE 4317 (International Conference on Experimental Mechanics 2000), pp. 156-159 (2001).
  8. S. Soontaranon and J. Widjaja, "Particle sizing and tracking by using digital analysis", Proc. First International Symposium on Optical and Quantum Technology, pp.68-71 (2001).
  9. U. Suripon and J. Widjaja, "JPEG compression of digital holograms," Proc. First International Symposium on Optical and Quantum Technology, pp.72-74 (2001).
  10. S. Soontaranon, J. Widjaja, and T. Asakura, "Particle sizing and tracking by using wavelet analysis and reconstruction of envelope function," Proc. SPIE 4929 (Photonics Asia: Optical Information Processing Technology), pp. 141-148 (2002).
  11. J. Widjaja, "IP router by using spectral hologram as address bank," Proc. SPIE 4929 (Photonics Asia: Optical Information Processing Technology), pp. 165-171 (2002). (Invited paper)
  12. J. Widjaja and U. Suripon, “Effects of JPEG Compression on Joint Transform Correlator,” Proc. ICCAS 2004 (2004 International Conference on Control, Automation, and Systems), pp. 1662-1665 (2004).
  13. J. Widjaja , S. Soontaranon and T. Asakura, "Holographic Particle Sizing by Using Absolutes Values of Wavelet Transform,"Proc. SPIE 5852 (The 3rd International Conference on Experimental Mechanics), pp. 573-577 (2004).
  14. J. Widjaja and P. Raweng, "Quality of images reconstructed from in-line Fresnel holograms,"Proc. 2nd International Conference on Optics and Laser Applications, pp. 24-28 (2007). (Plenary talk)
  15. S. Soontaranon and J. Widjaja, "Particle tracking from in-line holograms by using single wavelet coefficient," Proc. International Workshop and Conference on Photonics and Nanotechnology, pp. 22 (2007).