公开(公告)号：US20170331990A1

公开(公告)日：2017-11-16

申请号：US15151417

申请日：2016-05-10

Applicant: Massachusetts Institute of Technology

Inventor： Barmak Heshmat Dehkordi ,  Ik Hyun Lee ,  Hisham Bedri ,  Ramesh Raskar

IPC: H04N5/225 ,  G02B6/06

CPC classification number: H04N5/2256 ,  G02B6/06 ,  H04N5/2257

Abstract: An open-ended, incoherent bundle of optical fibers transmits light from a nearby scene. A camera captures images of the back end of the fiber bundle. Because the fiber bundle is incoherent, the captured image is shuffled, in the sense that the relative position of pixels in the image differs from the relative position of the scene regions that correspond to the pixels. Calibration is performed in order to map from the front end positions to the back-end positions of the fibers. In the calibration, pulses of light are delivered, in such a way that the time at which light reflecting from a given pulse enters a given fiber directly correlates to the position of the front end of the given fiber. A time-of-flight sensor takes measurements indicative of these time signatures. Based on the map obtained from calibration, a computer de-shuffles the image.

公开(公告)号：US10003725B2

公开(公告)日：2018-06-19

申请号：US15861645

申请日：2018-01-03

Applicant: Massachusetts Institute of Technology

Inventor： Barmak Heshmat Dehkordi ,  Ik Hyun Lee ,  Hisham Bedri ,  Ramesh Raskar

IPC: H04N5/225 ,  G02B6/06

CPC classification number: H04N5/2256 ,  G02B6/04 ,  G02B6/06 ,  H04N5/2257

Abstract: An open-ended, incoherent bundle of optical fibers transmits light from a nearby scene. A camera captures images of the back end of the fiber bundle. Because the fiber bundle is incoherent, the captured image is shuffled, in the sense that the relative position of pixels in the image differs from the relative position of the scene regions that correspond to the pixels. Calibration is performed in order to map from the front end positions to the back-end positions of the fibers. In the calibration, pulses of light are delivered, in such a way that the time at which light reflecting from a given pulse enters a given fiber directly correlates to the position of the front end of the given fiber. A time-of-flight sensor takes measurements indicative of these time signatures. Based on the map obtained from calibration, a computer de-shuffles the image.

公开(公告)号：US10330610B2

公开(公告)日：2019-06-25

申请号：US15266195

申请日：2016-09-15

Applicant: Massachusetts Institute of Technology ,  Board of Trustees of Michigan State University

Inventor： Gregory Charvat ,  Andrew Temme ,  Micha Feigin-Almon ,  Ramesh Raskar ,  Hisham Bedri

IPC: G01N22/00 ,  G01S13/88 ,  G01N21/3586

Abstract: An imaging system images near-field objects with focused microwave or terahertz radiation. Multiple antennas emit microwave or terahertz radiation, such that the radiation varies in frequency over time, illuminates a near-field object, reflects from the near-field object, and travels to a passive aperture. For example, the passive aperture may comprise a dielectric lens or a parabolic reflector. The passive aperture focuses, onto a spatial region, the microwave or terahertz radiation that reflected from the near-field object. One or more antennas take measurements, in the spatial region, of the microwave or terahertz radiation that reflected from the near-field object. A computer calculates, based on the measurements, an image of the near-field object and depth information regarding the near-field object.

公开(公告)号：US09894254B2

公开(公告)日：2018-02-13

申请号：US15151417

申请日：2016-05-10

Applicant: Massachusetts Institute of Technology

Inventor： Barmak Heshmat Dehkordi ,  Ik Hyun Lee ,  Hisham Bedri ,  Ramesh Raskar

IPC: H04N5/225 ,  G02B6/06

CPC classification number: H04N5/2256 ,  G02B6/06 ,  H04N5/2257

Abstract: An open-ended, incoherent bundle of optical fibers transmits light from a nearby scene. A camera captures images of the back end of the fiber bundle. Because the fiber bundle is incoherent, the captured image is shuffled, in the sense that the relative position of pixels in the image differs from the relative position of the scene regions that correspond to the pixels. Calibration is performed in order to map from the front end positions to the back-end positions of the fibers. In the calibration, pulses of light are delivered, in such a way that the time at which light reflecting from a given pulse enters a given fiber directly correlates to the position of the front end of the given fiber. A time-of-flight sensor takes measurements indicative of these time signatures. Based on the map obtained from calibration, a computer de-shuffles the image.

公开(公告)号：US20180131851A1

公开(公告)日：2018-05-10

申请号：US15861645

申请日：2018-01-03

Applicant: Massachusetts Institute of Technology

Inventor： Barmak Heshmat Dehkordi ,  Ik Hyun Lee ,  Hisham Bedri ,  Ramesh Raskar

IPC: H04N5/225 ,  G02B6/06

CPC classification number: H04N5/2256 ,  G02B6/06 ,  H04N5/2257

Abstract: An open-ended, incoherent bundle of optical fibers transmits light from a nearby scene. A camera captures images of the back end of the fiber bundle. Because the fiber bundle is incoherent, the captured image is shuffled, in the sense that the relative position of pixels in the image differs from the relative position of the scene regions that correspond to the pixels. Calibration is performed in order to map from the front end positions to the back-end positions of the fibers. In the calibration, pulses of light are delivered, in such a way that the time at which light reflecting from a given pulse enters a given fiber directly correlates to the position of the front end of the given fiber. A time-of-flight sensor takes measurements indicative of these time signatures. Based on the map obtained from calibration, a computer de-shuffles the image.

公开(公告)号：US20170212059A1

公开(公告)日：2017-07-27

申请号：US15266195

申请日：2016-09-15

Applicant: Massachusetts Institute of Technology ,  Board of Trustees of Michigan State University

Inventor： Gregory Charvat ,  Andrew Temme ,  Micha Feigin-Almon ,  Ramesh Raskar ,  Hisham Bedri

IPC: G01N22/00 ,  G01N21/35

CPC classification number: G01N22/00 ,  G01N21/3586 ,  G01S13/88 ,  G01S13/887

Abstract: An imaging system images near-field objects with focused microwave or terahertz radiation. Multiple antennas emit microwave or terahertz radiation, such that the radiation varies in frequency over time, illuminates a near-field object, reflects from the near-field object, and travels to a passive aperture. For example, the passive aperture may comprise a dielectric lens or a parabolic reflector. The passive aperture focuses, onto a spatial region, the microwave or terahertz radiation that reflected from the near-field object. One or more antennas take measurements, in the spatial region, of the microwave or terahertz radiation that reflected from the near-field object. A computer calculates, based on the measurements, an image of the near-field object and depth information regarding the near-field object.