Prof. Joewono Widjaja Profile

Prof. Joewono Widjaja

at Suranaree Univ of Technology

SPIE Involvement:

Author

Publications (34)

SPIE Journal Paper | 2 September 2024

Nonuniform background removal in inline holography using a numerically scaled illuminating beam intensity

Joewono Widjaja, Saowaros Dawprateep, Panomsak Meemon

OE, Vol. 63, Issue 09, 094101, (September 2024) https://doi.org/10.1117/12.10.1117/1.OE.63.9.094101

KEYWORDS: Holograms, 3D image reconstruction, Bismuth, Holography, Image quality, Signal intensity, Particles, Optical simulations, Diffraction, Optical engineering

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Proceedings Article | 5 March 2018 Paper

3D object shape reconstruction using structured light illumination

Joewono Widjaja, Jaroon Wongjarern

Proceedings Volume 10714, 107140F (2018) https://doi.org/10.1117/12.2299640

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Proceedings Article | 5 March 2018 Paper

Study of 3D profilometry by using wavelet filter

Taweesak Chaiyakhun, Joewono Widjaja, Jaroon Wongjarern

Proceedings Volume 10714, 107140J (2018) https://doi.org/10.1117/12.2299809

KEYWORDS: Wavelets, Optical filters, Fourier transforms, Gaussian filters, Phase shift keying, Cameras, Projection systems, 3D metrology, Modulation, CCD cameras

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SPIE Journal Paper | 19 January 2018

Improved accuracy in Wigner–Ville distribution-based sizing of rod-shaped particle using flip and replication technique

Porntip Chuamchaitrakool, Joewono Widjaja, Hiroyuki Yoshimura

OE, Vol. 57, Issue 01, 014105, (January 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.1.014105

KEYWORDS: Holograms, Particles, Image sensors, Particle sizing, 3D image reconstruction, Optical simulations, Optical engineering, Signal analyzers, Holography, Image processing

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SPIE Journal Paper | 21 July 2017

Experimental extractions of particle position from inline holograms using single coefficient of Wigner–Ville analysis

Joewono Widjaja, Saowaros Dawprateep, Porntip Chuamchaitrakool

OE, Vol. 56, Issue 07, 074103, (July 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.7.074103

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Proceedings Article | 11 November 2016 Paper

Pre-cataract surgery test using speckle pattern

Suganda Jutamulia, Erning Wihardjo, Joewono Widjaja

Proceedings Volume 10150, 101500C (2016) https://doi.org/10.1117/12.2244634

KEYWORDS: Surgery, Speckle, Semiconductor lasers, Retina, Speckle pattern, Eye, Collimation, Spatial frequencies, Opacity, Cornea

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Proceedings Article | 11 November 2016 Paper

Particle tracking by using single coefficient of Wigner-Ville distribution

J. Widjaja, S. Dawprateep, P. Chuamchaitrakool, P. Meemon

Proceedings Volume 10150, 1015004 (2016) https://doi.org/10.1117/12.2242418

KEYWORDS: Particles, Holograms, Digital holography, Holography, Computer simulations, 3D image reconstruction, Signal analyzers, Fourier transforms, Spatial frequencies, Computing systems

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Proceedings Article | 29 July 2015 Paper

Photonic signal processing using acousto-optic effects

Joewono Widjaja

Proceedings Volume 9659, 965909 (2015) https://doi.org/10.1117/12.2197414

KEYWORDS: Bragg cells, Signal processing, Acousto-optics, Fourier transforms, Spectrum analysis, Wigner distribution functions, Modulation, Mirrors, Image processing, Signal analysis

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Proceedings Article | 29 July 2015 Paper

Properties of Wigner-Ville distribution’s coefficients in in-line particle hologram analysis

S. Dawprateep, J. Widjaja, P. Chuamchaitrakool, P. Meemon

Proceedings Volume 9659, 96590E (2015) https://doi.org/10.1117/12.2195604

KEYWORDS: Particles, Holograms, Digital holography, Holography, Spatial frequencies, 3D image reconstruction, Photonics, Digital recording, Tissue optics, Wavefronts

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Proceedings Article | 17 July 2015 Paper

Experimental demonstrations of retinal recognition using compression-based joint transform correlator

Joewono Widjaja, Komin Kaewphaluk

Proceedings Volume 9524, 95240M (2015) https://doi.org/10.1117/12.2186492

KEYWORDS: Image compression, Retinal scanning, Target recognition, Joint transforms, Optical correlators, 3D acquisition, Information security, Quantization, Photonics, Retina

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Proceedings Article | 2 June 2014 Paper

Design, implementation, and characterization of spectrometer-based spectral domain optical coherence tomography

Kunakorn Palawong, Pornthep Pongchalee, Porntip Chuamchaitrakool, Sukanya Tachatraiphop, Joewono Widjaja, Panomsak Meemon

Proceedings Volume 9234, 923417 (2014) https://doi.org/10.1117/12.2054287

KEYWORDS: Spectroscopy, Optical coherence tomography, Imaging systems, Spectral resolution, Modulation transfer functions, Mirrors, Image resolution, Biomedical optics, Light sources, Point spread functions

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Proceedings Article | 2 June 2014 Paper

Holographic particle size extraction by using Wigner-Ville distribution

Porntip Chuamchaitrakool, Joewono Widjaja, Hiroyuki Yoshimura

Proceedings Volume 9234, 923414 (2014) https://doi.org/10.1117/12.2054226

KEYWORDS: Holograms, Holography, Particles, Modulation, 3D image reconstruction, Charge-coupled devices, CCD image sensors, MATLAB, Optical simulations, Digital holography

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Proceedings Article | 2 June 2014 Paper

Fourier transform profilometry by using digital dc subtraction

J. Wongjarern, J. Widjaja, W. Sangpech, N. Thongdee, P. Santisoonthornwat, O. Traisak, P. Chuamchaitrakool, P. Meemon

Proceedings Volume 9234, 923412 (2014) https://doi.org/10.1117/12.2054138

KEYWORDS: Fourier transforms, Projection systems, Modulation, CCD cameras, 3D metrology, LCDs, Ronchi rulings, Sensors, Experimental mechanics, Phase modulation

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Proceedings Article | 22 June 2013 Paper

Joint transform correlator using JPEG-compressed reference images

Joewono Widjaja

Proceedings Volume 8769, 87691M (2013) https://doi.org/10.1117/12.2018835

KEYWORDS: Image compression, Joint transforms, Optical correlators, Target recognition, Fingerprint recognition, Spatial frequencies, Speckle, CCD image sensors, Quantization, Computer simulations

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Proceedings Article | 7 June 2013 Paper

Retinal recognition using compression-based joint transform correlator

Ubon Suripon, Joewono Widjaja

Proceedings Volume 8883, 888310 (2013) https://doi.org/10.1117/12.2021772

KEYWORDS: Image compression, Retina, Target recognition, Retinal scanning, Optical correlators, Joint transforms, Computing systems, Information security, Quantization, Target detection

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SPIE Journal Paper | 12 March 2013

Retinal blood vessel detection using wavelet-matched filter

Joewono Widjaja, Ubon Suripon

OE, Vol. 52, Issue 03, 037204, (March 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.3.037204

KEYWORDS: Electronic filtering, Blood vessels, Wavelets, Gaussian filters, Image filtering, Target detection, Image segmentation, Image processing, Retina, Blood

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SPIE Journal Paper | 1 September 2011

Retina recognition using compression-based joint transform correlator

Joewono Widjaja, Ubon Suripon

OE, Vol. 50, Issue 09, 098201, (September 2011) https://doi.org/10.1117/12.10.1117/1.3626205

KEYWORDS: Retina, Image compression, Chromium, Target recognition, Retinal scanning, Joint transforms, Optical correlators, Optical engineering, 3D acquisition, Biometrics

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Proceedings Article | 17 November 2010 Paper

Holographic image encryption using random phase mask

Joewono Widjaja

Proceedings Volume 7851, 785108 (2010) https://doi.org/10.1117/12.872728

KEYWORDS: Image encryption, Holography, Image quality, Holograms, Computer simulations, Digital holography, CCD image sensors, Convolution, Computer security, Mach-Zehnder interferometers

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SPIE Journal Paper | 1 July 2008

Modified joint transform correlator using smoothed amplitude-modulated filter

Pitchaya Kaewkasi, Joewono Widjaja, Jun Uozumi

OE, Vol. 47, Issue 07, 077203, (July 2008) https://doi.org/10.1117/12.10.1117/1.2957043

KEYWORDS: Joint transforms, Optical correlators, Target detection, Optical filters, Optical engineering, Target recognition, Computer simulations, Spatial frequencies, Fourier transforms, Image filtering

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Proceedings Article | 3 April 2008 Paper

Particle tracking from in-line holograms by using single wavelet coefficient

S. Soontaranon, J. Widjaja

Proceedings Volume 6793, 679305 (2008) https://doi.org/10.1117/12.798951

KEYWORDS: Holograms, Wavelets, Particles, Distance measurement, Wavelet transforms, Holography, CCD image sensors, Optical fibers, Digital holography, 3D image reconstruction

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SPIE Journal Paper | 1 January 2008

Effects of threshold on multiple-target detection by using a modified amplitude-modulated joint transform correlator

PItchaya Kaewkasi, Joewono Widjaja, Jun Uozumi

OE, Vol. 47, Issue 01, 017206, (January 2008) https://doi.org/10.1117/12.10.1117/1.2835698

KEYWORDS: Target detection, Optical engineering, Optical correlators, Joint transforms, Computer simulations, 3D acquisition, Spatial frequencies, Signal attenuation, Computing systems, Fourier transforms

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Proceedings Article | 12 April 2005 Paper

Holographic particle sizing by using absolute values of the wavelet transform

Joewono Widjaja, Siriwat Soontaranon, Toshimitsu Asakura

Proceedings Volume 5852, (2005) https://doi.org/10.1117/12.621667

KEYWORDS: Holograms, Particles, Wavelet transforms, Digital holography, Wavelets, Holography, Particle sizing, Optical fibers, Optical simulations, Modulation

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SPIE Journal Paper | 1 August 2004

Real-time joint transform correlator using compressed reference images

Joewono Widjaja, Ubon Suripon

OE, Vol. 43, Issue 08, (August 2004) https://doi.org/10.1117/12.10.1117/1.1781665

KEYWORDS: Image compression, Joint transforms, Optical correlators, Chromium, Optical engineering, Automatic target recognition, Computer simulations, Fingerprint recognition, Target recognition, Spatial frequencies

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SPIE Journal Paper | 1 August 2004

ANFIS-based fingerprint-matching algorithm

Hui Hong, Feijun Song, Joewono Widjaja, Jianhua Li

OE, Vol. 43, Issue 08, (August 2004) https://doi.org/10.1117/12.10.1117/1.1765663

KEYWORDS: Fuzzy logic, Fingerprint recognition, Image filtering, Fuzzy systems, Data centers, Databases, Evolutionary algorithms, Data modeling, Detection and tracking algorithms, System identification

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SPIE Journal Paper | 1 March 2003

Spectral-hologram-based correlator for photonic IP router: architectural considerations

Joewono Widjaja

OE, Vol. 42, Issue 03, (March 2003) https://doi.org/10.1117/12.10.1117/1.1542591

KEYWORDS: Optical correlators, Holography, Holograms, Second-harmonic generation, Switches, Diffraction gratings, Fourier transforms, Wavelength division multiplexing, Collimation, Signal generators

Proceedings Article | 16 September 2002 Paper

Particle tracking and sizing by using wavelet analysis and reconstruction of envelope function

Siriwat Soontaranon, Joewono Widjaja, Toshimitsu Asakura

Proceedings Volume 4929, (2002) https://doi.org/10.1117/12.483205

KEYWORDS: Particles, Holograms, Spherical lenses, Charge-coupled devices, CCD image sensors, Wavelets, Wavelet transforms, Holography, Modulation, Digital holography

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Proceedings Article | 16 September 2002 Paper

IP router by using spectral hologram as address bank

Joewono Widjaja

Proceedings Volume 4929, (2002) https://doi.org/10.1117/12.483208

KEYWORDS: Second-harmonic generation, Holograms, Holography, Diffraction gratings, Wavelength division multiplexing, Optical correlators, Fourier transforms, Networks, Collimation, Optical fibers

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Proceedings Article | 13 June 2001 Paper

Effects of image compression on digital specklegrams

Joewono Widjaja

Proceedings Volume 4317, (2001) https://doi.org/10.1117/12.429563

KEYWORDS: Image compression, Photography, Speckle, Speckle pattern, CCD cameras, Image quality, Data compression, Glasses, Copper, Digital photography

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Proceedings Article | 19 July 1999 Paper

Particle sizing and tracking by using wavelet transform

Joewono Widjaja

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.355012

KEYWORDS: Particles, Wavelet transforms, Particle sizing, 3D image reconstruction, Holograms, Optical filters, Automatic tracking, Holography, Image filtering, Wavelets

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Proceedings Article | 29 October 1996 Paper

Optical associative memory using wavelet transform

Joewono Widjaja, Abdul Wahab

Proceedings Volume 2904, (1996) https://doi.org/10.1117/12.256282

KEYWORDS: Holography, Content addressable memory, Wavelet transforms, Wavelets, Mirrors, Optical filters, Neurons, 3D image reconstruction, Pattern recognition, Electronic filtering

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Proceedings Article | 1 September 1996 Paper

Holographic associative memory using wavelet-matched filters

Joewono Widjaja

Proceedings Volume 2778, 27785V (1996) https://doi.org/10.1117/12.2299094

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Proceedings Article | 18 August 1995 Paper

Real-time wavelet-matched filtering using photorefractive four-wave mixing

Joewono Widjaja, Yasuo Tomita

Proceedings Volume 2529, (1995) https://doi.org/10.1117/12.217020

KEYWORDS: Nonlinear filtering, Electronic filtering, Four wave mixing, Crystals, Optical filters, Pattern recognition, Optical pattern recognition, Wavelets, Nonlinear optics, Laser crystals

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SPIE Journal Paper | 1 May 1994

Optical implementation of artificial synapses by means of the Wigner distribution approach

Joewono Widjaja, Jun Uozumi, Toshimitsu Asakura

OE, Vol. 33, Issue 05, (May 1994) https://doi.org/10.1117/12.10.1117/12.164603

KEYWORDS: Neurons, Diffractive optical elements, Neural networks, Wigner distribution functions, Holograms, Binary data, Detector arrays, Artificial neural networks, Optical components, Optical engineering

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Proceedings Article | 1 March 1991 Paper

Method for evaluating displacement of objects using the Wigner distribution function

Joewono Widjaja, Jun Uozumi, Toshimitsu Asakura

Proceedings Volume 1400, (1991) https://doi.org/10.1117/12.47845

KEYWORDS: Wigner distribution functions, Spatial frequencies, Fourier transforms, Speckle, Optical fabrication, Optical testing, Photography, Glasses, Speckle pattern, Transmittance

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