Lingfei C Meng

20130216123, Aug 22, 2013

Feb 16, 2012

13/398813

Sapna A. Shroff - Menlo Park CA, US
Kathrin Berkner - Los Altos CA, US
Lingfei Meng - Redwood City CA, US

RICOH CO., LTD. - Tokyo

G06K 9/00

382154

The spatial resolution of captured plenoptic images is enhanced. In one aspect, the plenoptic imaging process is modeled by a pupil image function (PIF), and a PIF inversion process is applied to the captured plenoptic image to produce a better resolution estimate of the object.

20130216124, Aug 22, 2013

Feb 16, 2012

13/398815

Sapna A. Shroff - Menlo Park CA, US
Kathrin Berkner - Los Altos CA, US
Lingfei Meng - Redwood City CA, US

Ricoh Co., Ltd. - Tokyo

G06K 9/00

382154

The spatial resolution of captured plenoptic images is enhanced. In one aspect, the plenoptic imaging process is modeled by a pupil image function (PIF), and a PIF inversion process is applied to the captured plenoptic image to produce a better resolution estimate of the object.

20130216125, Aug 22, 2013

Feb 17, 2012

13/399476

Sapna A. Shroff - Menlo Park CA, US
Kathrin Berkner - Los Altos CA, US
Lingfei Meng - Redwood City CA, US

RICOH CO., LTD. - Tokyo

G06K 9/00

382154

The spatial resolution of captured plenoptic images is enhanced. In one aspect, the plenoptic imaging process is modeled by a pupil image function (PIF), and a PIF inversion process is applied to the captured plenoptic image to produce a better resolution estimate of the object.

20130215236, Aug 22, 2013

Feb 17, 2012

13/399484

Sapna A. Shroff - Menlo Park CA, US
Kathrin Berkner - Los Altos CA, US
Lingfei Meng - Redwood City CA, US

RICOH CO., LTD. - Tokyo

H04N 13/02
G06K 9/00

348 49, 382154, 348E13074

The spatial resolution of captured plenoptic images is enhanced. In one aspect, the plenoptic imaging process is modeled by a pupil image function (PIF), and a PIF inversion process is applied to the captured plenoptic image to produce a better resolution estimate of the object.

20170127928, May 11, 2017

Jan 23, 2017

15/413133

Kathrin Berkner - Los Altos CA, US
Sapna A. Shroff - Menlo Park CA, US
Lingfei Meng - Redwood City CA, US
Nikhil Balram - Mountain View CA, US

Ricoh Company, Ltd. - Tokyo

A61B 1/227
A61B 1/00
A61B 5/00
A61B 5/12

A plenoptic otoscope enables three-dimensional and/or spectral imaging of the inside of the ear to assist in improved diagnosis of inflammations and infections. The plenoptic otoscope includes a primary imaging system and a plenoptic sensor. The primary imaging system includes an otoscope objective and relay optics, which cooperate to form an image of an inside of an ear at an intermediate image plane. The plenoptic sensor includes a microimaging array positioned at the intermediate image plane and a sensor array positioned at a conjugate of the pupil plane. An optional filter module may be positioned at the pupil plane or one of its conjugates to facilitate three-dimensional and/or spectral imaging.

20170084034, Mar 23, 2017

Nov 30, 2016

15/365671

Lingfei Meng - Redwood City CA, US
Liyang Lu - Houston TX, US
Noah Bedard - San Francisco CA, US
Kathrin Berkner - Los Altos CA, US

Ricoh Company, Ltd. - Tokyo

G06T 7/00
H04N 17/00

A collimated object is adjustable to produce collimated light propagating along different propagation directions. The plenoptic imaging system under calibration captures plenoptic images of the object adjusted to different propagation directions. The captured plenoptic images includes superpixels, each of which includes subpixels. Each subpixel captures light from a corresponding light field viewing direction. Based on the captured plenoptic images, a calibration module calculates which propagation directions map to which subpixels. The mapping defines the light field viewing directions for the subpixels. This can be used to improve processing of plenoptic images captured by the plenoptic imaging system.

20160278637, Sep 29, 2016

Jun 3, 2016

15/173574

Liang Gao - Santa Clara CA, US
Lingfei Meng - Redwood City CA, US
Noah Bedard - Pacifica CA, US

Ricoh Company, Ltd. - Tokyo

A61B 3/14
A61B 3/00
H04N 5/247
A61B 3/12
H04N 5/232
H04N 13/02
G02B 5/20
A61B 3/10

A multimode fundus camera enables three-dimensional and/or spectral/polarization imaging of the interior of the eye to assist in improved diagnosis. In one aspect, the multimode fundus camera includes a first imaging subsystem, a filter module, and a second imaging subsystem. The first imaging subsystem is positionable in front of an eye to form an optical image of an interior of the eye. The filter module is positioned at a pupil plane of the first imaging subsystem or at a conjugate thereof. The second imaging subsystem include a microimaging array and a sensor array. The microimaging array is positioned at the image plane or a conjugate thereof, and the sensor array is positioned at the pupil plane or a conjugate thereof.

20160202048, Jul 14, 2016

Jan 9, 2015

14/594017

Lingfei Meng - Redwood City CA, US
Liyang Lu - Houston TX, US
Kathrin Berkner - Los Altos CA, US
Ivana Tosic - Berkeley CA, US

RICOH COMPANY, LTD. - Tokyo

G01B 11/25
G06T 7/60
H04N 5/225

A plenoptic camera captures a plenoptic image of an object illuminated by a point source (preferably, collimated illumination). The plenoptic image is a sampling of the four-dimensional light field reflected from the object. The plenoptic image is made up of superpixels, each of which is made up of subpixels. Each superpixel captures light from a certain region of the object (i.e., a range of x,y spatial locations) and the subpixels within a superpixel capture light propagating within a certain range of directions (i.e., a range of u,v spatial directions). Accordingly, optical properties estimation, surface normal reconstruction, depth estimation, and three-dimensional rendering can be provided by processing only a single plenoptic image. In one approach, the plenoptic image is used to estimate the bidirectional reflectance distribution function (BRDF) of the object surface.