Dr. Jason Geng Profile

Dr. Jason Geng

President/Founder

SPIE Involvement:

Author

Proceedings Article | 7 March 2014 Paper

Integration of real-time 3D image acquisition and multiview 3D display

Zhaoxing Zhang, Zheng Geng, Tuotuo Li, Wei Li, Jingyi Wang, Yongchun Liu

Proceedings Volume 8979, 89790O (2014) https://doi.org/10.1117/12.2037444

KEYWORDS: 3D displays, 3D acquisition, Cameras, Data acquisition, 3D image processing, Projection systems, Calibration, 3D modeling, Video, Image processing

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Proceedings Article | 7 March 2014 Paper

Design of a single projector multiview 3D display system

Jason Geng

Proceedings Volume 8979, 89790K (2014) https://doi.org/10.1117/12.2036464

KEYWORDS: 3D displays, Mirrors, Scanning probe microscopy, Projection systems, Optical design, Digital Light Processing, Calibration, Reflectivity, Distortion, 3D image processing

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Proceedings Article | 8 March 2013 Paper

Automatic respiration tracking for radiotherapy using optical 3D camera

Tuotuo Li, Jason Geng, Shidong Li

Proceedings Volume 8618, 861804 (2013) https://doi.org/10.1117/12.2003202

KEYWORDS: 3D image processing, Principal component analysis, Radiotherapy, Automatic tracking, Imaging systems, Motion analysis, 3D acquisition, Cameras, Radio optics, Stereoscopic cameras

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Rapid optical three-dimensional (O3D) imaging systems provide accurate digitized 3D surface data in real-time, with no patient contact nor radiation. The accurate 3D surface images offer crucial information in image-guided radiation therapy (IGRT) treatments for accurate patient repositioning and respiration management. However, applications of O3D imaging techniques to image-guided radiotherapy have been clinically challenged by body deformation, pathological and anatomical variations among individual patients, extremely high dimensionality of the 3D surface data, and irregular respiration motion. In existing clinical radiation therapy (RT) procedures target displacements are caused by (1) inter-fractional anatomy changes due to weight, swell, food/water intake; (2) intra-fractional variations from anatomy changes within any treatment session due to voluntary/involuntary physiologic processes (e.g. respiration, muscle relaxation); (3) patient setup misalignment in daily reposition due to user errors; and (4) changes of marker or positioning device, etc. Presently, viable solution is lacking for in-vivo tracking of target motion and anatomy changes during the beam-on time without exposing patient with additional ionized radiation or high magnet field. Current O3D-guided radiotherapy systems relay on selected points or areas in the 3D surface to track surface motion. The configuration of the marks or areas may change with time that makes it inconsistent in quantifying and interpreting the respiration patterns. To meet the challenge of performing real-time respiration tracking using O3D imaging technology in IGRT, we propose a new approach to automatic respiration motion analysis based on linear dimensionality reduction technique based on PCA (principle component analysis). Optical 3D image sequence is decomposed with principle component analysis into a limited number of independent (orthogonal) motion patterns (a low dimension eigen-space span by eigen-vectors). New images can be accurately represented as weighted summation of those eigen-vectors, which can be easily discriminated with a trained classifier. We developed algorithms, software and integrated with an O3D imaging system to perform the respiration tracking automatically. The resulting respiration tracking system requires no human intervene during it tracking operation. Experimental results show that our approach to respiration tracking is more accurate and robust than the methods using manual selected markers, even in the presence of incomplete imaging data.

Proceedings Article | 8 March 2013 Paper

Medical applications of fast 3D cameras in real-time image-guided radiotherapy (IGRT) of cancer

Shidong Li, Tuotuo Li, Jason Geng

Proceedings Volume 8618, 861802 (2013) https://doi.org/10.1117/12.2002603

KEYWORDS: Stereoscopic cameras, Imaging systems, Radiotherapy, Cameras, Video, Principal component analysis, Lung, Tumors, X-ray computed tomography, Computed tomography

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Proceedings Article | 8 March 2013 Paper

Performance assessment of 3D surface imaging technique for medical imaging applications

Tuotuo Li, Jason Geng, Shidong Li

Proceedings Volume 8618, 861803 (2013) https://doi.org/10.1117/12.2001456

KEYWORDS: 3D image processing, Cameras, Imaging systems, 3D acquisition, Stereoscopy, Calibration, 3D modeling, Stereoscopic cameras, Projection systems, Radiotherapy

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Proceedings Article | 8 March 2013 Paper

An interactive multiview 3D display system

Zhaoxing Zhang, Zheng Geng, Mei Zhang, Hui Dong

Proceedings Volume 8618, 86180P (2013) https://doi.org/10.1117/12.2000360

KEYWORDS: 3D displays, 3D image processing, Projection systems, Visualization, Cameras, 3D vision, 3D modeling, Glasses, Ions, Imaging systems

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Proceedings Article | 13 February 2012 Paper

Volumetric 3D display using a DLP projection engine

Jason Geng

Proceedings Volume 8254, 82540I (2012) https://doi.org/10.1117/12.904027

KEYWORDS: 3D displays, 3D image processing, Digital Light Processing, Visualization, Spatial light modulators, 3D volumetric displays, Mirrors, Visual system, Projection systems, Glasses

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Proceedings Article | 11 February 2011 Paper

DLP-based structured light 3D imaging technologies and applications

Jason Geng

Proceedings Volume 7932, 79320B (2011) https://doi.org/10.1117/12.873125

KEYWORDS: 3D image processing, Stereoscopy, 3D metrology, Imaging systems, Calibration, Projection systems, Cameras, 3D acquisition, Digital Light Processing, Structured light

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Proceedings Article | 25 August 2004 Paper

3D FaceCam: a fast and accurate 3D facial imaging device for biometrics applications

Jason Geng, Ping Zhuang, Patrick May, Steven Yi, David Tunnell

Proceedings Volume 5404, (2004) https://doi.org/10.1117/12.542208

KEYWORDS: 3D image processing, Error analysis, Cameras, 3D acquisition, Stereoscopic cameras, 3D modeling, Imaging systems, Biometrics, Facial recognition systems, Light sources and illumination

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SPIE Journal Paper | 1 July 1997

Fingerprinting classification using fuzzy cerebellar model arithmetic computer neural networks

Zheng Geng, Weicheng Shen

JEI, Vol. 6, Issue 03, (July 1997) https://doi.org/10.1117/12.10.1117/12.269896

KEYWORDS: Neural networks, Fuzzy logic, Databases, Computer simulations, Image classification, Binary data, Computer programming, Raster graphics, Computer networks, Fingerprint recognition

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Proceedings Article | 1 May 1996 Paper

Experimental investigation of active machine tool vibration control

J. Rojas, Chen Liang, Zheng Geng

Proceedings Volume 2721, (1996) https://doi.org/10.1117/12.239149

KEYWORDS: Vibration control, Actuators, Control systems, Spindles, Surface finishing, Optical filters, Process control, Analog electronics, Digital filtering, Spectrum analysis

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SPIE Journal Paper | 1 February 1996

Rainbow three-dimensional camera: new concept of high-speed three-dimensional vision systems

Zheng Geng

OE, Vol. 35, Issue 02, (February 1996) https://doi.org/10.1117/12.10.1117/1.601023

KEYWORDS: Cameras, 3D image processing, Stereoscopic cameras, 3D acquisition, Imaging systems, Image processing, CCD cameras, Optical filters, Linear filtering, 3D vision

Proceedings Article | 8 September 1993 Paper

New Terfenol-D actuator design with applications to multiple DOF active vibration control

Leonard Haynes, Zheng Geng, Joseph Teter

Proceedings Volume 1917, (1993) https://doi.org/10.1117/12.152821

KEYWORDS: Actuators, Magnetism, Intelligence systems, Control systems, Prototyping, Smart structures, Active vibration control, Vibration isolation, Algorithm development, Magnetostrictive materials

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Showing 5 of 13 publications

Conference Committee Involvement (3)

Emerging Digital Micromirror Device Based Systems and Applications VII

10 February 2015 | San Francisco, California, United States

Emerging Digital Micromirror Device Based Systems and Applications VI

4 February 2014 | San Francisco, California, United States

Emerging Digital Micromirror Device Based Systems and Applications V

5 February 2013 | San Francisco, California, United States

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