Prof. Jigang Wu Profile

Prof. Jigang Wu

Assistant Professor at UM-SJTU Joint Institute

SPIE Involvement:

Author

Publications (25)

SPIE Journal Paper | 8 June 2022

Wide field-of-view line-scanning lensless in-line holographic microscope

Hanchen Cui, Hongfeng Xu, Jigang Wu

OE, Vol. 61, Issue 06, 063103, (June 2022) https://doi.org/10.1117/12.10.1117/1.OE.61.6.063103

KEYWORDS: 3D image reconstruction, Holograms, Holography, Microscopes, Image resolution, Cameras, Imaging systems, Line scan image sensors, Sensors, Veins

Read Abstract +

Proceedings Article | 19 February 2018 Paper

A 2.8-mm-diameter scanhead for multispectral photoacoustic microscopy and optical coherence tomography

Zhendong Guo, Jie Wang, Zhongfei Li, Yang Hu, Jigang Wu, Sung-Liang Chen

Proceedings Volume 10494, 1049456 (2018) https://doi.org/10.1117/12.2288967

KEYWORDS: Optical coherence tomography, Absorption, Endoscopy, GRIN lenses, In vivo imaging, Image resolution, Tissue optics, Photoacoustic microscopy, Scattering, Photoacoustic imaging

Read Abstract +

Proceedings Article | 19 February 2018 Presentation + Paper

Resolution-enhanced digital in-line holographic microscope with segmentation and pixel super-resolution technique

Mingjun Wang, Shaodong Feng, Jigang Wu

Proceedings Volume 10558, 105580J (2018) https://doi.org/10.1117/12.2288087

KEYWORDS: Holograms, Image segmentation, Digital holography, Image resolution, Super resolution, Image processing algorithms and systems, Holography, Microscopes, Imaging systems, Resolution enhancement technologies

Read Abstract +

Pixelation, blur and additional noise of imaging system limit the resolution of final images acquired. Many pixel superresolution algorithms have been applied to enhance the resolution of imaging system by merging a sequence of lowresolution holograms with different type of imaging system, for example by shifting illumination source or using wavelength scanning. Most of these pixel super-resolution imaging systems can only be implemented to single-layer sample. For multi-layer imaging system and volumetric imaging scenarios, the relative displacement of various sample at different layers will disturb each other. Herein, we report a portable, cost-effective, lensless wide-filed digital in-line holographic microscopy imaging system based on in-line hologram segmentation and pixel super-resolution algorithm, which can separate target sample from the background and improve the resolution of the sample. We demonstrated the effectiveness of our system with numerical simulation and experiment with volumetric sample. In numerical simulation, we applied a very simple two-layer sample model that samples in two layers have various moving speed and directions and also did the volumetric imaging experiment with cuvette containing algae floating in. In our system, the sensor captured a sequence of low-resolution diffraction patterns. The target sample mix with background disturbance, which will invalidate the direct pixel super-resolution technique. We applied segmentation algorithm to the reconstructed images from holograms, separating target sample from background and generating a sequence of sub-images containing only target sample with same resolution and numerical aperture as original holograms. Finally the enhanced resolution reconstructed image of target sample was obtained with pixel super-resolution algorithm, which can go beyond pixel limitation and get sub-pixel perspective microscopy. This imaging system has the advantages of wide-field, portable and lensless.

SPIE Journal Paper | 28 September 2017

Enhanced resolution for amplitude object in lensless inline holographic microscope with grating illumination

Shaodong Feng, Mingjun Wang, Jigang Wu

OE, Vol. 56, Issue 09, 093107, (September 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.9.093107

KEYWORDS: 3D image reconstruction, Holography, Holograms, Image resolution, Image enhancement, Resolution enhancement technologies, Modulation, Sensors, Microscopes, Optical sensors

Read Abstract +

Proceedings Article | 31 October 2016 Paper

Endoscopic optical coherence tomography using compressive sensing

Jie Wang, Shaodong Feng, Jigang Wu

Proceedings Volume 10024, 100242Q (2016) https://doi.org/10.1117/12.2245902

KEYWORDS: Optical coherence tomography, Endoscopy, Biomedical optics, Compressed sensing, Data acquisition, 3D image processing, Mirrors, 3D acquisition, Single mode fibers, Signal detection

Read Abstract +

Proceedings Article | 31 October 2016 Paper

Digital in-line holographic microscope based on the grating illumination with improved resolution by interpolation

Shaodong Feng, Mingjun Wang, Jigang Wu

Proceedings Volume 10022, 1002205 (2016) https://doi.org/10.1117/12.2245517

KEYWORDS: Digital holography, Image resolution, Holography, Sensors, Digital imaging, Ronchi rulings, 3D image reconstruction, Numerical simulations, Holograms, Microscopes

Read Abstract +

Proceedings Article | 31 October 2016 Paper

Pixel super-resolution in digital in-line holography

Mingjun Wang, Shaodong Feng, Jigang Wu

Proceedings Volume 10022, 100220A (2016) https://doi.org/10.1117/12.2245969

KEYWORDS: Image resolution, 3D image reconstruction, Holography, Super resolution, Digital holography, Holograms, Reconstruction algorithms, Microscopes, Sensors, Detection and tracking algorithms

Read Abstract +

SPIE Journal Paper | 17 February 2016 Open Access

Wide field of view multifocal scanning microscopy with sparse sampling

Jie Wang, Jigang Wu

JBO, Vol. 21, Issue 02, 026008, (February 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.2.026008

KEYWORDS: Microscopes, Microscopy, Data acquisition, Skin, Optical sensors, Image restoration, 3D image reconstruction, Holography, Luminescence, Imaging systems

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 20 November 2014 Paper

Miniaturized endoscopic probe for optical coherence tomography with a tiny magnet driving device

Ziwei Pang, Jigang Wu

Proceedings Volume 9268, 92681W (2014) https://doi.org/10.1117/12.2071433

KEYWORDS: Optical coherence tomography, Endoscopy, Mirrors, Metals, Glasses, GRIN lenses, Magnetism, Signal to noise ratio, Biomedical optics, Micromirrors

Read Abstract +

Proceedings Article | 18 November 2014 Paper

Wide field-of-view microscopy using compressive sensing

Jie Wang, Jigang Wu

Proceedings Volume 9268, 926811 (2014) https://doi.org/10.1117/12.2071601

KEYWORDS: Compressed sensing, Microscopy, Image restoration, Data acquisition, Microscopes, Image resolution, Collimation, Biomedical optics, Holograms, 3D image reconstruction

Read Abstract +

Proceedings Article | 11 November 2014 Paper

Iterative digital in-line holographic reconstruction with improved resolution by data interpolation

Mingjun Wang, Jigang Wu

Proceedings Volume 9271, 927110 (2014) https://doi.org/10.1117/12.2071694

KEYWORDS: 3D image reconstruction, Holograms, Holography, Digital holography, Sensors, Image resolution, Image sensors, Image restoration, Imaging systems, Numerical simulations

Read Abstract +

Proceedings Article | 11 November 2014 Paper

Lensless microscope based on iterative in-line holographic reconstruction

Jigang Wu

Proceedings Volume 9271, 927114 (2014) https://doi.org/10.1117/12.2071890

KEYWORDS: Holography, 3D image reconstruction, Microscopes, Reconstruction algorithms, Photomasks, Image quality, Digital holography, Sensors, Numerical simulations, Image restoration

Read Abstract +

SPIE Journal Paper | 22 March 2013

Characterization of Talbot pattern illumination for scanning optical microscopy

Guangshuo Liu, Changhuei Yang, Jigang Wu

OE, Vol. 52, Issue 09, 091714, (March 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.9.091714

KEYWORDS: Optical microscopy, Microscopy, Image resolution, Illumination engineering, Computer simulations, Gaussian beams, Optical engineering, Image quality, Detection and tracking algorithms, Algorithms

Read Abstract +

Proceedings Article | 11 December 2012 Paper

Wide field-of-view microscopy with Talbot pattern illumination

Jigang Wu, Guangshuo Liu

Proceedings Volume 8553, 85530B (2012) https://doi.org/10.1117/12.999603

KEYWORDS: Microscopes, Microscopy, Luminescence, Optical sensors, Cancer, Biomedical optics, Objectives, Image transmission, Optical microscopes, Image resolution

Read Abstract +

Proceedings Article | 24 February 2010 Paper

A wide field-of-view microscope based on holographic focus grid

Jigang Wu, Xiquan Cui, Guoan Zheng, Lap Man Lee, Changhuei Yang

Proceedings Volume 7570, 757009 (2010) https://doi.org/10.1117/12.842303

KEYWORDS: Microscopes, Holograms, Collimation, Image resolution, Optical sensors, Holography, 3D image reconstruction, Objectives, Beam splitters, Prototyping

Read Abstract +

SPIE Journal Paper | 1 March 2008 Open Access

Handheld forward-imaging needle endoscope for ophthalmic optical coherence tomography inspection

Shuo Han, Marinko Sarunic, Jigang Wu, Mark Humayun, Changhuei Yang

JBO, Vol. 13, Issue 02, 020505, (March 2008) https://doi.org/10.1117/12.10.1117/1.2904664

KEYWORDS: Optical coherence tomography, GRIN lenses, Vitreous, Retina, Surgery, Endoscopes, Inspection, Optical inspection, Eye, Retinal scanning

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 20 February 2008 Paper

Observing dynamics of transparent samples by harmonically matched grating-based full-field quadrature phase interferometer

Jigang Wu, Zahid Yaqoob, Xin Heng, Lap Man Lee, Xiquan Cui, Changhuei Yang

Proceedings Volume 6861, 686102 (2008) https://doi.org/10.1117/12.759210

KEYWORDS: Phase shifts, Diffraction gratings, Interferometers, Imaging systems, Beam splitters, Charge-coupled devices, Image processing, Phase interferometry, Phase imaging, CCD cameras

Read Abstract +

Proceedings Article | 20 February 2007 Paper

Zahid Yaqoob, Jigang Wu, Xiquan Cui, Xin Heng, Changhuei Yang

Proceedings Volume 6488, 64880J (2007) https://doi.org/10.1117/12.701585

KEYWORDS: Phase shifts, Interferometers, Diffraction gratings, Phase interferometry, Diffraction, Phase measurement, Michelson interferometers, Phase shift keying, Mirrors, Optical design

Read Abstract +

Proceedings Article | 14 February 2007 Paper

Quantitative phase imaging using grating-based quadrature phase interferometer

Jigang Wu, Zahid Yaqoob, Xin Heng, Xiquan Cui, Changhuei Yang

Proceedings Volume 6443, 64430J (2007) https://doi.org/10.1117/12.701694

KEYWORDS: Phase shifts, Diffraction gratings, Holography, Phase imaging, Beam splitters, Interferometers, Phase interferometry, Imaging systems, Diffraction, Mach-Zehnder interferometers

Read Abstract +

Proceedings Article | 7 February 2007 Paper

Endoscopic optical coherence tomography of the retina at 1310 nm using paired-angle rotating scanning

Marinko Sarunic, Shuo Han, Jigang Wu, Zahid Yaqoob, Mark Humayun, Changhuei Yang

Proceedings Volume 6429, 642911 (2007) https://doi.org/10.1117/12.701226

KEYWORDS: Optical coherence tomography, GRIN lenses, Endoscopy, Vitreous, Retina, Imaging systems, Surgery, Mirrors, Scanners, Polishing

Read Abstract +

SPIE Journal Paper | 1 November 2006 Open Access

Methods and application areas of endoscopic optical coherence tomography

Zahid Yaqoob, Jigang Wu, Emily McDowell, Xin Heng, Changhuei Yang

JBO, Vol. 11, Issue 06, 063001, (November 2006) https://doi.org/10.1117/12.10.1117/1.2400214

KEYWORDS: Optical coherence tomography, Endoscopy, Endoscopes, Tissues, Imaging systems, Biopsy, Tissue optics, Mirrors, In vivo imaging, GRIN lenses

Read Abstract +

DOWNLOAD PAPER

SPIE Journal Paper | 1 September 2006 Open Access

Molecular contrast optical coherence tomography: a pump-probe scheme using indocyanine green as a contrast agent

Zahid Yaqoob, Emily McDowell, Jigang Wu, Xin Heng, Jeff Fingler, Changhuei Yang

JBO, Vol. 11, Issue 05, 054017, (September 2006) https://doi.org/10.1117/12.10.1117/1.2360525

KEYWORDS: Optical coherence tomography, Absorption, Molecules, Statistical analysis, Glasses, Latex, Indocyanine green, Imaging systems, Tissues, Scattering

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 20 February 2006 Paper

Pump-probe optical coherence tomography using indocyanine green as a contrast agent

Zahid Yaqoob, Emily McDowell, Jigang Wu, Changhuei Yang

Proceedings Volume 6079, 607904 (2006) https://doi.org/10.1117/12.646509

KEYWORDS: Optical coherence tomography, Absorption, Molecules, Indocyanine green, Glasses, Imaging systems, Quantum efficiency, Single mode fibers, Photons, Beam splitters

Read Abstract +

Proceedings Article | 20 February 2006 Paper

Forward-cone-imaging OCT needle probe

Jigang Wu, Michael Conry, Chunhui Gu, Fei Wang, Zahid Yaqoob, Changhuei Yang

Proceedings Volume 6079, 60791J (2006) https://doi.org/10.1117/12.646554

KEYWORDS: GRIN lenses, Optical coherence tomography, Single mode fibers, Prototyping, Signal to noise ratio, Laser beam diagnostics, Photography, Biomedical optics, Actuators, Biopsy

Read Abstract +

Proceedings Article | 4 December 2003 Paper

Particle-fixed Monte Carlo model for optical coherence tomography

Ping Xue, Jigang Wu, Jiansong Gao, Shan Sun

Proceedings Volume 5255, (2003) https://doi.org/10.1117/12.546238

Read Abstract +

Showing 5 of 25 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years