Dr. Changgeng Liu Profile

Dr. Changgeng Liu

Imaging systems architect at Google LLC

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Author

Publications (15)

Proceedings Article | 28 February 2019 Paper

Optical coherence tomography guided artery-vein classification in retinal OCT angiography of macular region

Taeyoon Son, Minhaj Alam, Changgeng Liu, Devrim Toslak, Xincheng Yao

Proceedings Volume 10858, 108581L (2019) https://doi.org/10.1117/12.2508918

KEYWORDS: Optical coherence tomography, Blood vessels, Veins, Arteries, Image segmentation, Image classification, Angiography, Detection and tracking algorithms, Image resolution, Optical discs

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SPIE Journal Paper | 11 May 2018 Open Access

In vivo super-resolution imaging of transient retinal phototropism evoked by oblique light stimulation

Yiming Lu, Changgeng Liu, Xincheng Yao

JBO, Vol. 23, Issue 05, 050502, (May 2018) https://doi.org/10.1117/12.10.1117/1.JBO.23.5.050502

KEYWORDS: In vivo imaging, Retina, Super resolution, Retinal scanning, Rods, Information operations, Line scan image sensors, Spatial resolution, Video, Physiology

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Proceedings Article | 20 February 2018 Paper

In vivo observation of transient photoreceptor movement correlated with oblique light stimulation

Yiming Lu, Changgeng Liu, Xincheng Yao

Proceedings Volume 10497, 104971M (2018) https://doi.org/10.1117/12.2287262

KEYWORDS: In vivo imaging, Retina, Super resolution, Rods, Spatial resolution, Temporal resolution, Ophthalmology, Physiology

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Proceedings Article | 19 February 2018 Paper

A holographic waveguide based eye tracker

Changgeng Liu, Beatrice Pazzucconi, Juan Liu, Lei Liu, Xincheng Yao

Proceedings Volume 10474, 104741T (2018) https://doi.org/10.1117/12.2290065

KEYWORDS: Eye, Waveguides, Holography, Eye models, Image segmentation, Cameras, Imaging systems, Prototyping, Eyeglasses, Glasses

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Proceedings Article | 24 April 2017 Presentation

Coherence switching of a vertical-cavity semiconductor-laser for multimode biomedical imaging (Conference Presentation)

Hui Cao, Sebastian Knitter, Changgeng Liu, Brandon Redding, Mustafa Kezar Khokha, Michael Andrew Choma

Proceedings Volume 10075, 1007502 (2017) https://doi.org/10.1117/12.2251513

KEYWORDS: Semiconductor lasers, Spatial coherence, Coherence imaging, Switching, Semiconductors, Heart, Biomedical optics, Modes of laser operation, Coherence (optics), Speckle

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SPIE Journal Paper | 19 December 2016 Open Access

In vivo super-resolution retinal imaging through virtually structured detection

Changgeng Liu, Yanan Zhi, Benquan Wang, Damber Thapa, Yanjun Chen, Minhaj Alam, Yiming Lu, Xincheng Yao

JBO, Vol. 21, Issue 12, 120502, (December 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.12.120502

KEYWORDS: Super resolution, In vivo imaging, Spatial frequencies, Retinal scanning, Image resolution, Retina, Eye, Spatial resolution, Signal to noise ratio, Microscopy

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Proceedings Article | 27 April 2016 Presentation

High-speed line-scanning confocal holographic microscopy for quantitative phase imaging (Conference Presentation)

Changgeng Liu, Sebastian Knitter, Zhilong Cong, Ikbal Sencan, Hui Cao, Michael Choma

Proceedings Volume 9718, 971820 (2016) https://doi.org/10.1117/12.2212033

KEYWORDS: Confocal microscopy, Holography, Microscopes, Line scan image sensors, Phase imaging, Microscopy, Digital holography, Medicine, Reflectivity, Cameras

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SPIE Journal Paper | 3 July 2015 Open Access

Digital adaptive optics line-scanning confocal imaging system

Changgeng Liu, Myung Kim

JBO, Vol. 20, Issue 11, 111203, (July 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.11.111203

KEYWORDS: Confocal microscopy, Adaptive optics, Imaging systems, Digital holography, Optical signal processing, Image restoration, Holograms, Digital imaging, Eye, Stars

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SPIE Journal Paper | 3 April 2014 Open Access

Four-dimensional motility tracking of biological cells by digital holographic microscopy

Xiao Yu, Jisoo Hong, Changgeng Liu, Michael Cross, Donald Haynie, Myung Kim

JBO, Vol. 19, Issue 04, 045001, (April 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.4.045001

KEYWORDS: Digital holography, Holograms, Optical fibers, 3D image processing, 3D metrology, 3D image reconstruction, Microscopy, Holography, Profiling, Particles

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SPIE Journal Paper | 3 April 2014 Open Access

Review of digital holographic microscopy for three-dimensional profiling and tracking

Xiao Yu, Jisoo Hong, Changgeng Liu, Myung Kim

OE, Vol. 53, Issue 11, 112306, (April 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.11.112306

KEYWORDS: Digital holography, Holograms, 3D metrology, Particles, Holography, Profiling, 3D image processing, Microscopy, 3D image reconstruction, Optical tracking

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Proceedings Article | 22 February 2013 Paper

Ophthalmic adaptive optics by digital holography

Myung Kim, Changgeng Liu

Proceedings Volume 8587, 858707 (2013) https://doi.org/10.1117/12.2004166

KEYWORDS: Adaptive optics, Eye, Digital holography, Phase measurement, Holograms, Imaging systems, Retina, Charge-coupled devices, Image quality, Fourier transforms

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Proceedings Article | 9 April 2011 Paper

Fast Fourier transform based direct integration algorithm for the linear canonical transform

Dayong Wang, Changgeng Liu, Yunxin Wang, Jie Zhao

Proceedings Volume 7822, 78220I (2011) https://doi.org/10.1117/12.884980

KEYWORDS: Fourier transforms, Integral transforms, Wave propagation, Systems modeling, Free space, Free space optics, Digital holography, Reconstruction algorithms, Convolution, Algorithm development

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Proceedings Article | 3 August 2010 Paper

Autofocusing on pure phase object for living cell imaging in lensless Fourier transform digital holography

Jie Zhao, Dayong Wang, Yunxin Wang, Changgeng Liu, Yan Li, Huakun Cui, Yuhong Wan

Proceedings Volume 7790, 779017 (2010) https://doi.org/10.1117/12.860527

KEYWORDS: Reconstruction algorithms, 3D image reconstruction, Fourier transforms, Holograms, Digital holography, Charge-coupled devices, Convolution, Phase contrast, Diffraction, Algorithm development

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Proceedings Article | 25 November 2009 Paper

The effect of sampling on FFT-based direct integration method in digital holography

Changgeng Liu, Dayong Wang, Yan Li, Yuhong Wan, Zhuqing Jiang

Proceedings Volume 7513, 75131Q (2009) https://doi.org/10.1117/12.837859

KEYWORDS: Remote sensing, Paraxial approximations, Charge-coupled devices, Digital holography, Diffraction, Image restoration, Holograms, Lawrencium, 3D image reconstruction, Image quality

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SPIE Journal Paper | 1 October 2009

Comparison and verification of numerical reconstruction methods in digital holography

Changgeng Liu, Dayong Wang, Yizhuo Zhang

OE, Vol. 48, Issue 10, 105802, (October 2009) https://doi.org/10.1117/12.10.1117/1.3251340

KEYWORDS: Pixel resolution, Diffraction, Digital holography, Fourier transforms, Convolution, Remote sensing, Optical engineering, Image segmentation, Sensors, Paraxial approximations

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Showing 5 of 15 publications

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