Tr35 - Mit technology review • Popular mechanics breakthrough award - Popular mechanics • Sme innovations watchlist - Society of manufacturing engineers
Morgridge Institute for Research - Madison, Wisconsin Area since Mar 2012
Associate Scientist
University of Wisconsin-Madison - Madison, Wisconsin Area since Apr 2013
Honorary Associate
MIT Media Lab 2010 - Apr 2012
Postdoctoral Associate
University of New Mexico Aug 2003 - Dec 2009
PhD Student/Research Assistant
University of Wuerzburg Oct 2000 - Aug 2003
Student
Education:
The University of New Mexico 2003 - 2009
PhD, Physics
Julius-Maximilians-Universität Würzburg / University of Wuerzburg 2000 - 2003
TR35 MIT Technology Review The TR35 is an annual list selected by a panel of experts and published by MIT's Technology Review magazine, naming the world's top 35 innovators under the age of 35. Popular Mechanics Breakthrough Award Popular Mechanics Annual award for brilliant innovators and products. SME Innovations Watchlist Society of Manufacturing Engineers This member-driven program showcases new and emerging technologies that are making a difference in manufacturing.
Us Patents
Methods And Apparatus For Imaging Of Occluded Objects From Scattered Light
Ramesh Raskar - Cambridge MA, US Andreas Velten - Madison WI, US
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
H04N 13/02
US Classification:
348 46
Abstract:
In exemplary implementations of this invention, a 3D range camera “looks around a corner” to image a hidden object, using light that has bounced (reflected) off of a diffuse reflector. The camera can recover the 3D structure of the hidden object.
Ramesh Raskar - Cambridge MA, US Andreas Velten - Madison WI, US
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G03B 17/17
US Classification:
348369
Abstract:
In exemplary implementations of this invention, a set of two scanning mirrors scans the one dimensional field of view of a streak camera across a scene. The mirrors are continuously moving while the camera takes streak images. Alternately, the mirrors may only between image captures. An illumination source or other captured event is synchronized with the camera so that for every streak image the scene looks different. The scanning assures that different parts of the scene are captured.
Methods And Apparatus For Estimation Of Motion And Size Of Non-Line-Of-Sight Objects
Rohit Pandharkar - Pune, IN Andreas Velten - Madison WI, US Ramesh Raskar - Cambridge MA, US
Assignee:
MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA
International Classification:
H04N 7/18
US Classification:
348135, 348E07085
Abstract:
In exemplary implementations of this invention, a time of flight camera (ToF camera) can estimate the location, motion and size of a hidden moving object, even though (a) the hidden object cannot be seen directly (or through mirrors) from the vantage point of the ToF camera (including the camera's illumination source and sensor), and (b) the object is in a visually cluttered environment. The hidden object is a NLOS (non-line-of-sight) object. The time of flight camera comprises a streak camera and a laser. In these exemplary implementations, the motion and absolute locations of NLOS moving objects in cluttered environments can be estimated through tertiary reflections of pulsed illumination, using relative time differences of arrival at an array of receivers. Also, the size of NLOS moving objects can be estimated by backprojecting extremas of NLOS moving object time responses.
Systems, Methods, And Media For Single Photon Depth Imaging With Improved Precision In Ambient Light
In accordance with some embodiments, systems, methods and media for single photon depth imaging with improved precision in ambient light conditions are provided. In some embodiments, the system comprises: a light source; a single photon detector; an attenuation element configured to provide a variable intensity attenuation factor; and a processor programmed to: (a)-determine an ambient light intensity associated with a scene point; (b)-select an attenuation factor based on the ambient light intensity; (c)-estimate a depth of the scene point based on a multiplicity of photon arrival times determined using the detector during a period of time during which light incident on the detector is attenuated by the selected attenuation factor and during which the light source is configured to periodically emit a pulse of light toward the scene point; (d)-repeat (a)-(c) for each of a multiplicity of scene points.
Systems, Methods, And Media For High Dynamic Range Imaging Using Dead-Time-Limited Single Photon Detectors
- Madison WI, US Mohit Gupta - Madison WI, US Andreas Velten - Madison WI, US
International Classification:
H04N 5/355 H04N 5/369 H04N 5/374 H04N 5/3745
Abstract:
In accordance with some embodiments, systems, methods and media for high dynamic range imaging using dead-time-limited single photon detectors are provided. In some embodiments, a system for high dynamic range imaging is provided, comprising: an image sensor comprising: a pixels comprising: a single photon detector having dead time τ; and a counter coupled to an output of the single photon detector, wherein the counter is configured to increment in response to a signal indicative of detection of a photon output by the single photon detector; and a processor that is programmed to: read out a value stored by the counter after an exposure time has elapsed; and calculate an intensity for the pixel based on the value and the dead time τ.
Systems, Methods And, Media For Encoding And Decoding Signals Used In Time Of Flight Imaging
In accordance with some embodiments, systems, methods and media for encoding and decoding signals used in time-of-flight imaging are provided. In some embodiments, a method for estimating the depth of a scene is provided, comprising: causing a light source to emit modulated light toward the scene based on a modulation function; causing the image sensor to generate a first value based on the modulated light and a first demodulation function of K modulation functions; causing the image sensor to generate a second value; causing the image sensor to generate a third value; and determining a depth estimate for the portion of the scene based on the first value, the second value, the third value, and three correlation functions each including at least one half of a trapezoid wave.
Systems, Methods And, Media For Encoding And Decoding Signals Used In Time Of Flight Imaging
- Madison WI, US - New York NY, US Andreas Velten - Madison WI, US Shree K. Nayar - New York NY, US
International Classification:
H04N 13/02 G06T 7/521 H04N 13/00
Abstract:
In accordance with some embodiments, systems, methods and media for encoding and decoding signals used in time-of-flight imaging are provided. In some embodiments, a method for estimating the depth of a scene is provided, comprising: causing a light source to emit modulated light toward the scene based on a modulation function; causing the image sensor to generate a first value based on the modulated light and a first demodulation function of K modulation functions, including at least one trapezoid wave; causing the image sensor to generate a second value; causing the image sensor to generate a third value; and determining a depth estimate for the portion of the scene based on the first value, the second value, and the third value.
Tissue Fluorescence Monitor With Ambient Light Rejection
- Madison WI, US Adam Uselmann - Madison WI, US Andreas Velten - Madison WI, US Surendra Prajapati - Madison WI, US Kevin Eliceiri - Madison WI, US
Assignee:
Wisconsin Alumni Research Foundation - Madison WI
International Classification:
A61B 5/00 G01J 1/44 G01J 1/58
US Classification:
600476
Abstract:
Fluorescent markers used to identify a tissue may be imaged in a bright environment by synchronizing the imaging process with rapidly switched ambient lighting so that imaging occurs in phase with a switching off of the ambient lighting. In this way, valuable fluorescent imaging may be performed in an environment that appears to be brightly illuminated, for example in the area of a surgical suite.
Name / Title
Company / Classification
Phones & Addresses
Andreas Velten Engineer
University of New Mexico Medical Doctor's Office College/University
1021 Medical Arts Ave NE, Albuquerque, NM 87102 5052726000