Sujoy Marjorie Chatterjee

US Patent:

20120038786, Feb 16, 2012

Filed:

Aug 3, 2011

Appl. No.:

13/197304

Inventors:

Kevin F. Kelly - Houston TX, US
Richard G. Baraniuk - Houston TX, US
Lenore McMackin - Austin TX, US
Robert F. Bridge - Austin TX, US
Sujoy Chatterjee - Austin TX, US
Tyler H. Weston - Austin TX, US

International Classification:

H04N 5/228
H04N 5/232
H01L 27/146
G06K 9/34

US Classification:

3482221, 382173, 348345, 2502081, 348E05045, 348E05031

Abstract:

Mechanisms for increasing the rate of acquisition of compressed/encoded image representations are disclosed. An imaging system may deliver subsets of a modulated light stream onto respective light sensing devices. The light sensing devices may be sampled in parallel. Samples from each light sensing device may be used to construct a respective sub-image of a final image. The parallelism allows compressed images to be acquired at a higher rate. The number of light sensing devices and/or the number of pixels per image may be selected to achieve a target image acquisition rate. In another embodiment, spatial portions of the incident light stream are separated and delivered to separate light modulators. In yet another embodiment, the incident light stream is split into a plurality of beams, each of which retains the image present in the incident light stream and is delivered to a separate light modulator.

US Patent:

20120038789, Feb 16, 2012

Filed:

Jul 28, 2011

Appl. No.:

13/193553

Inventors:

Kevin F. Kelly - Houston TX, US
Richard G. Baraniuk - Houston TX, US
Lenore McMackin - Austin TX, US
Robert F. Bridge - Austin TX, US
Sujoy Chatterjee - Austin TX, US
Donna E. Hewitt - Austin TX, US
Tyler H. Weston - Austin TX, US

International Classification:

H04N 9/73

US Classification:

3482261, 348E05031

Abstract:

An imaging system and method that captures compressive sensing (CS) measurements of a received light stream, and also obtains samples of background light level (BGLL). The BGLL samples may be used to compensate the CS measurements for variations in the BGLL. The system includes: a light modulator to spatially modulate the received light stream with spatial patterns, and a lens to concentrate the modulated light stream onto a light detector. The samples of BGLL may be obtained in various ways: (a) injecting calibration patterns among the spatial patterns; (b) measuring complementary light reflected by digital micromirrors onto a secondary output path; (c) separating and measuring a portion of light from the optical input path; (d) low-pass filtering the CS measurements; and (e) employing a light power meter with its own separate input path. Also, the CS measurements may be high-pass filtered to attenuate background light variation.

US Patent:

20120038790, Feb 16, 2012

Filed:

Jul 28, 2011

Appl. No.:

13/193556

Inventors:

Kevin F. Kelly - Houston TX, US
Richard G. Baraniuk - Houston TX, US
Lenore McMackin - Austin TX, US
Robert F. Bridge - Austin TX, US
Sujoy Chatterjee - Austin TX, US
Donna E. Hewitt - Austin TX, US
Tyler H. Weston - Austin TX, US

International Classification:

H04N 9/73
H04N 5/238

US Classification:

3482261, 348369, 348E09051, 348E0504

Abstract:

An imaging system and method that captures compressive sensing (CS) measurements of a received light stream, and also obtains samples of background light level (BGLL). The BGLL samples may be used to compensate the CS measurements for variations in the BGLL. The system includes: a light modulator to spatially modulate the received light stream with spatial patterns, and a lens to concentrate the modulated light stream onto a light detector. The samples of BGLL may be obtained in various ways: (a) injecting calibration patterns among the spatial patterns; (b) measuring complementary light reflected by digital micromirrors onto a secondary output path; (c) separating and measuring a portion of light from the optical input path; (d) low-pass filtering the CS measurements; and (e) employing a light power meter with its own separate input path. Also, the CS measurements may be high-pass filtered to attenuate background light variation.

US Patent:

20120038819, Feb 16, 2012

Filed:

Aug 11, 2011

Appl. No.:

13/207900

Inventors:

Lenore McMackin - Austin TX, US
Sujoy Chatterjee - Austin TX, US

International Classification:

H04N 5/238

US Classification:

348369, 348E05024

Abstract:

A compressive imaging system including a light modulator, a light sensing device and a TIR prism. The TIR prism is configured to receive an incident light beam, to provide the incident light beam to the light modulator, to receive a modulated light beam MLB from the light modulator, and to direct the modulated light beam onto a sensing path. The light sensing device receives the modulated light beam (or at least a portion of the modulated light beam) and generates an electrical signal that represents intensity of the modulated light beam (or the “at least a portion” of the modulated light beam). The TIR prism may reduce a distance required to separate the incident light beam from the modulated light beam.

US Patent:

20130002858, Jan 3, 2013

Filed:

Jun 27, 2012

Appl. No.:

13/534528

Inventors:

Robert F. Bridge - Austin TX, US
James M. Tidman - Round Rock TX, US
Lenore McMackin - Austin TX, US
Sujoy Chatterjee - Austin TX, US

International Classification:

H04N 5/225
H04N 5/33
H04N 7/18

US Classification:

348135, 348340, 348164, 348E05024, 348E07085, 348E0509

Abstract:

A system and method for conserving power in compressive imaging. An optical subsystem separates an incident light stream into a primary light stream and a secondary light stream. The primary light stream is modulated with a sequence of spatial patterns by a light modulator. The modulated light stream is sensed by a first light sensing device. The secondary light stream is sensed by a second light sensing device. The signal(s) produced by the second light sensing device may be monitored to determine when to turn on power to the light modulator. Thus, the light modulator may remain off when not needed. In an alternative implementation, a light sensing device is used to sense the light reflected from the light modulator in its power-off state. The signal(s) produced by that light sensing device may be monitored to determine when to turn on power to the light modulator.

US Patent:

20140002721, Jan 2, 2014

Filed:

Sep 4, 2013

Appl. No.:

14/017581

Inventors:

Kevin F. Kelly - Houston TX, US
Robert F. Bridge - Austin TX, US
Sujoy Chatterjee - Austin TX, US
Lenore McMackin - Austin TX, US

Assignee:

InView Technology Corporation - Austin TX

International Classification:

H04N 5/235

US Classification:

348369, 348370

Abstract:

An imaging system and method that captures compressive sensing (CS) measurements of a received light stream, and also obtains samples of background light level (BGLL). The BGLL samples may be used to compensate the CS measurements for variations in the BGLL. The system includes: a light modulator to spatially modulate the received light stream with spatial patterns, and a lens to concentrate the modulated light stream onto a light detector. The samples of BGLL may be obtained in various ways: (a) injecting calibration patterns among the spatial patterns; (b) measuring complementary light reflected by digital micromirrors onto a secondary output path; (c) separating and measuring a portion of light from the optical input path; (d) low-pass filtering the CS measurements; and (e) employing a light power meter with its own separate input path. Also, the CS measurements may be high-pass filtered to attenuate background light variation.

US Patent:

20140009638, Jan 9, 2014

Filed:

Sep 4, 2013

Appl. No.:

14/017834

Inventors:

Kevin F. Kelly - Houston TX, US
Robert F. Bridge - Austin TX, US
Sujoy Chatterjee - Austin TX, US
Lenore McMackin - Austin TX, US

Assignee:

InView Technology Corporation - Austin TX

International Classification:

H04N 5/238

US Classification:

3482261

Abstract:

An imaging system and method that captures compressive sensing (CS) measurements of a received light stream, and also obtains samples of background light level (BGLL). The BGLL samples may be used to compensate the CS measurements for variations in the BGLL. The system includes: a light modulator to spatially modulate the received light stream with spatial patterns, and a lens to concentrate the modulated light stream onto a light detector. The samples of BGLL may be obtained in various ways: (a) injecting calibration patterns among the spatial patterns; (b) measuring complementary light reflected by digital micromirrors onto a secondary output path; (c) separating and measuring a portion of light from the optical input path; (d) low-pass filtering the CS measurements; and (e) employing a light power meter with its own separate input path. Also, the CS measurements may be high-pass filtered to attenuate background light variation.