Patents by Inventor Palghat Ramesh
Palghat Ramesh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11958112Abstract: A three-dimensional (3D) printer includes a nozzle and a camera configured to capture a real image or a real video of a liquid metal while the liquid metal is positioned at least partially within the nozzle. The 3D printer also includes a computing system configured to perform operations. The operations include generating a model of the liquid metal positioned at least partially within the nozzle. The operations also include generating a simulated image or a simulated video of the liquid metal positioned at least partially within the nozzle based at least partially upon the model. The operations also include generating a labeled dataset that comprises the simulated image or the simulated video and a first set of parameters. The operations also include reconstructing the liquid metal in the real image or the real video based at least partially upon the labeled dataset.Type: GrantFiled: June 24, 2021Date of Patent: April 16, 2024Assignee: XEROX CORPORATIONInventors: Robert R. Price, Raja Bala, Svyatoslav Korneev, Christoforos Somarakis, Matthew Shreve, Adrian Lew, Palghat Ramesh
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Patent number: 11945169Abstract: A 3D printer includes a nozzle configured to jet a drop of liquid metal therethrough. The 3D printer also includes a light source configured to illuminate the drop with a pulse of light. A duration of the pulse of light is from about 0.0001 seconds to about 0.1 seconds. The 3D printer also includes a camera configured to capture an image, video, or both of the drop. The 3D printer also includes a computing system configured to detect the drop in the image, the video, or both. The computing system is also configured to characterize the drop after the drop is detected. Characterizing the drop includes determining a size of the drop, a location of the drop, or both in the image, the video, or both.Type: GrantFiled: May 27, 2021Date of Patent: April 2, 2024Assignee: XEROX CORPORATIONInventors: Vijay Kumar Baikampady Gopalkrishna, Raja Bala, Palghat Ramesh, David Allen Mantell, Peter Michael Gulvin, Mark A. Cellura
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Patent number: 11808680Abstract: A method includes illuminating a drop with a pulse of light from a light source. A duration of the pulse of light is from about 0.0001 seconds to about 0.1 seconds. The method also includes capturing an image, video, or both of the drop. The method also includes detecting the drop in the image, the video, or both. The method also includes characterizing the drop after the drop is detected. Characterizing the drop includes determining a size of the drop, a location of the drop, or both in the image, the video, or both.Type: GrantFiled: May 27, 2021Date of Patent: November 7, 2023Assignee: XEROX CORPORATIONInventors: Vijay Kumar Baikampady Gopalkrishna, Raja Bala, Palghat Ramesh, David Allen Mantell, Peter Michael Gulvin, Mark A. Cellura
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Patent number: 11760000Abstract: A method includes capturing a video of a plurality of drops being jetted through a nozzle of a printer. The method also includes measuring a signal proximate to the nozzle based at least partially upon the video. The method also includes determining one or more metrics that characterize a behavior of the drops based at least partially upon the signal.Type: GrantFiled: May 7, 2021Date of Patent: September 19, 2023Assignee: XEROX CORPORATIONInventors: Raja Bala, Vijay Kumar Baikampady Gopalkrishna, Palghat Ramesh, David Allen Mantell, Peter Michael Gulvin, Mark A. Cellura
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Patent number: 11724441Abstract: A 3D printer includes a nozzle and a camera configured to capture an image, a video, or both of a plurality of drops of liquid metal being jetted through the nozzle. The 3D printer also includes a computing system configured to measure a signal proximate to the nozzle based at least partially upon the image, the video, or both. The computing system is also configured to determine one or more metrics that characterize a behavior of the drops based at least partially upon the signal.Type: GrantFiled: May 7, 2021Date of Patent: August 15, 2023Assignees: PALO ALTO RESEARCH CENTER INCORPORATED, XEROX CORPORATIONInventors: Raja Bala, Vijay Kumar Baikampady Gopalkrishna, Palghat Ramesh, David Allen Mantell, Peter Michael Gulvin, Mark A. Cellura
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Publication number: 20220414380Abstract: A method includes defining a model for a liquid while the liquid is positioned at least partially within a nozzle of a printer. The method also includes synthesizing video frames of the liquid using the model to produce synthetic video frames. The method also includes generating a labeled dataset that includes the synthetic video frames and corresponding model values. The method also includes receiving real video frames of the liquid while the liquid is positioned at least partially within the nozzle of the printer. The method also includes generating an inverse mapping from the real video frames to predicted model values using the labeled dataset. The method also includes reconstructing the liquid in the real video frames based at least partially upon the predicted model values.Type: ApplicationFiled: June 24, 2021Publication date: December 29, 2022Applicants: PALO ALTO RESEARCH CENTER INCORPORATED, XEROX CORPORATIONInventors: Robert R. Price, Raja Bala, Svyatoslav Korneev, Christoforos Somarakis, Matthew Shreve, Adrian Lew, Palghat Ramesh
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Publication number: 20220410273Abstract: A three-dimensional (3D) printer includes a nozzle and a camera configured to capture a real image or a real video of a liquid metal while the liquid metal is positioned at least partially within the nozzle. The 3D printer also includes a computing system configured to perform operations. The operations include generating a model of the liquid metal positioned at least partially within the nozzle. The operations also include generating a simulated image or a simulated video of the liquid metal positioned at least partially within the nozzle based at least partially upon the model. The operations also include generating a labeled dataset that comprises the simulated image or the simulated video and a first set of parameters. The operations also include reconstructing the liquid metal in the real image or the real video based at least partially upon the labeled dataset.Type: ApplicationFiled: June 24, 2021Publication date: December 29, 2022Applicants: PALO ALTO RESEARCH CENTER INCORPORATED, XEROX CORPORATIONInventors: Robert R. Price, Raja Bala, Svyatoslav Korneev, Christoforos Somarakis, Matthew Shreve, Adrian Lew, Palghat Ramesh
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Publication number: 20220379564Abstract: A 3D printer includes a nozzle configured to jet a drop of liquid metal therethrough. The 3D printer also includes a light source configured to illuminate the drop with a pulse of light. A duration of the pulse of light is from about 0.0001 seconds to about 0.1 seconds. The 3D printer also includes a camera configured to capture an image, video, or both of the drop. The 3D printer also includes a computing system configured to detect the drop in the image, the video, or both. The computing system is also configured to characterize the drop after the drop is detected. Characterizing the drop includes determining a size of the drop, a location of the drop, or both in the image, the video, or both.Type: ApplicationFiled: May 27, 2021Publication date: December 1, 2022Applicants: PALO ALTO RESEARCH CENTER INCORPORATED, XEROX CORPORATIONInventors: Vijay Kumar Baikampady Gopalkrishna, Raja Bala, Palghat Ramesh, David Allen Mantell, Peter Michael Gulvin, Mark A. Cellura
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Publication number: 20220381666Abstract: A method includes illuminating a drop with a pulse of light from a light source. A duration of the pulse of light is from about 0.0001 seconds to about 0.1 seconds. The method also includes capturing an image, video, or both of the drop. The method also includes detecting the drop in the image, the video, or both. The method also includes characterizing the drop after the drop is detected. Characterizing the drop includes determining a size of the drop, a location of the drop, or both in the image, the video, or both.Type: ApplicationFiled: May 27, 2021Publication date: December 1, 2022Applicants: PALO ALTO RESEARCH CENTER INCORPORATED, XEROX CORPORATIONInventors: Vijay Kumar Baikampady Gopalkrishna, Raja Bala, Palghat Ramesh, David Allen Mantell, Peter Michael Gulvin, Mark A. Cellura
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Publication number: 20220355535Abstract: A method includes capturing a video of a plurality of drops being jetted through a nozzle of a printer. The method also includes measuring a signal proximate to the nozzle based at least partially upon the video. The method also includes determining one or more metrics that characterize a behavior of the drops based at least partially upon the signal.Type: ApplicationFiled: May 7, 2021Publication date: November 10, 2022Applicants: PALO ALTO RESEARCH CENTER INCORPORATED, XEROX CORPORATIONInventors: Raja Bala, Vijay Kumar Baikampady Gopalkrishna, Palghat Ramesh, David Allen Mantell, Peter Michael Gulvin, Mark A. Cellura
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Publication number: 20220355536Abstract: A 3D printer includes a nozzle and a camera configured to capture an image, a video, or both of a plurality of drops of liquid metal being jetted through the nozzle. The 3D printer also includes a computing system configured to measure a signal proximate to the nozzle based at least partially upon the image, the video, or both. The computing system is also configured to determine one or more metrics that characterize a behavior of the drops based at least partially upon the signal.Type: ApplicationFiled: May 7, 2021Publication date: November 10, 2022Applicants: PALO ALTO RESEARCH CENTER INCORPORATED, XEROX CORPORATIONInventors: Raja Bala, Vijay Kumar Baikampady Gopalkrishna, Palghat Ramesh, David Allen Mantell, Peter Michael Gulvin, Mark A. Cellura
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Patent number: 10068146Abstract: A detection-based segmentation-free method and system for license plate recognition. An image of a vehicle is initially captured utilizing an image-capturing unit. A license plate region is located in the image of the vehicle. A set of characters can then be detected in the license plate region and a geometry correction performed based on a location of the set of characters detected in the license plate region. An operation for sweeping an OCR across the license plate region can be performed to infer characters with respect to the set of characters and locations of the characters utilizing a hidden Markov model and leveraging anchored digit/character locations.Type: GrantFiled: February 25, 2016Date of Patent: September 4, 2018Assignee: CONDUENT BUSINESS SERVICES, LLCInventors: Orhan Bulan, Palghat Ramesh, Vladimir Kozitsky
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Publication number: 20170249524Abstract: A detection-based segmentation-free method and system for license plate recognition. An image of a vehicle is initially captured utilizing an image-capturing unit. A license plate region is located in the image of the vehicle. A set of characters can then be detected in the license plate region and a geometry correction performed based on a location of the set of characters detected in the license plate region. An operation for sweeping an OCR across the license plate region can be performed to infer characters with respect to the set of characters and locations of the characters utilizing a hidden Markov model and leveraging anchored digit/character locations.Type: ApplicationFiled: February 25, 2016Publication date: August 31, 2017Inventors: Orhan Bulan, Palghat Ramesh, Vladimir Kozitsky
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Patent number: 9353290Abstract: An embodiment of the present disclosure is directed to an indirect printing apparatus. The indirect printing apparatus comprises an intermediate transfer member comprising a substrate and a surface layer disposed over the substrate. The surface layer comprises a fluoroelastomer-aminosilane grafted polymer and infrared absorptive filler materials. The indirect printing apparatus also comprises a coating mechanism for forming a sacrificial coating onto the intermediate transfer member and a drying station for drying the sacrificial coating. At least one ink jet nozzle is positioned proximate the intermediate transfer member and configured for jetting ink droplets onto the sacrificial coating formed on the intermediate transfer member. An ink processing station comprises a radiation source for at least partially drying the ink on the sacrificial coating formed on the intermediate transfer member.Type: GrantFiled: April 11, 2014Date of Patent: May 31, 2016Assignee: XEROX CORPORATIONInventors: Anthony S. Condello, Chu-Heng Liu, David J. Gervasi, Jeffrey Folkins, Santokh S. Badesha, Mandakini Kanungo, Palghat Ramesh, Paul McConville, Phillip Wantuck, Lifeng Chen
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Publication number: 20150291847Abstract: An embodiment of the present disclosure is directed to an indirect printing apparatus. The indirect printing apparatus comprises an intermediate transfer member comprising a substrate and a surface layer disposed over the substrate. The surface layer comprises a fluoroelastomer-aminosilane grafted polymer and infrared absorptive filler materials. The indirect printing apparatus also comprises a coating mechanism for forming a sacrificial coating onto the intermediate transfer member and a drying station for drying the sacrificial coating. At least one ink jet nozzle is positioned proximate the intermediate transfer member and configured for jetting ink droplets onto the sacrificial coating formed on the intermediate transfer member. An ink processing station comprises a radiation source for at least partially drying the ink on the sacrificial coating formed on the intermediate transfer member.Type: ApplicationFiled: April 11, 2014Publication date: October 15, 2015Applicant: XEROX CORPORATIONInventors: ANTHONY S. CONDELLO, CHU-HENG LIU, DAVID J. GERVASI, JEFFREY FOLKINS, SANTOKH S. BADESHA, MANDAKINI KANUNGO, PALGHAT RAMESH, PAUL MCCONVILLE, PHILLIP WANTUCK, LIFENG CHEN
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Patent number: 9019329Abstract: A system for dampening fluid recovery in an ink-based digital printing system includes a seal manifold having a front seal portion, the front seal portion having an upper wall facing the imaging surface, the upper wall being configured to define an air flow channel with the imaging surface, the upper wall being contoured to form a distance between the upper wall and the imaging surface at an evaporation location that is less than distance between the upper wall and the imaging surface at locations interposing the evaporation location and a vacuum inlet channel of the seal manifold.Type: GrantFiled: July 25, 2013Date of Patent: April 28, 2015Assignee: Xerox CorporationInventors: Francisco Zirilli, Palghat Ramesh, Jack Lestrange, Peter J. Knausdorf
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Publication number: 20150029292Abstract: A system for dampening fluid recovery in an ink-based digital printing system includes a seal manifold having a front seal portion, the front seal portion having an upper wall facing the imaging surface, the upper wall being configured to define an air flow channel with the imaging surface, the upper wall being contoured to form a distance between the upper wall and the imaging surface at an evaporation location that is less than distance between the upper wall and the imaging surface at locations interposing the evaporation location and a vacuum inlet channel of the seal manifold.Type: ApplicationFiled: July 25, 2013Publication date: January 29, 2015Applicant: XEROX CORPORATIONInventors: Francisco ZIRILLI, Palghat RAMESH, Jack LESTRANGE, Peter J. KNAUSDORF
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Patent number: 8714725Abstract: A thin wall ink image receiving member enables the ink image receiving member to reach operational temperatures from a cold state more quickly than image receiving members used in previously known printers. The thin wall image receiving member includes at least one annular support member fixedly mounted against the inner surface of the cylindrical wall to enable the image receiving member to provide adequate pressure in a nip formed with a transfix roller to transfer an ink image from the image receiving member to media in the nip.Type: GrantFiled: November 10, 2011Date of Patent: May 6, 2014Assignee: Xerox CorporationInventors: Bruce Earl Thayer, Bin Zhang, Trevor James Snyder, Joseph Benjamin Gault, Palghat Ramesh, Paul J. McConville
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Patent number: 8649566Abstract: A method for detecting motion quality error of printed documents having text in a printing system includes: printing a document having text lines, each text line comprising a plurality of characters; scanning the printed document to generate a scanned image; detecting positions in a process direction of the printing system of one of text lines and characters in the scanned image; determining position errors in the process direction in the printed document based on the detected positions in the scanned image; determining at least one motion quality defect of the printing system in the process direction based on the determined position errors; and initiating an activity associated with said printing system in response to a motion quality error having been determined. A system for detecting motion quality error of printed documents is also disclosed.Type: GrantFiled: July 19, 2010Date of Patent: February 11, 2014Assignee: Xerox CorporationInventors: Beilei Xu, Wencheng Wu, Peter Paul, Palghat Ramesh
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Patent number: 8542410Abstract: A method, system, and computer program product for estimating exposure modulation in an image printing system is disclosed. The method includes determining a banding profile for an image printing system by a processor; determining an adjusted exposure modulation profile based on the banding profile using a least squares estimation by the processor; and printing an output based on the adjusted exposure profile.Type: GrantFiled: September 8, 2009Date of Patent: September 24, 2013Assignee: Xerox CorporationInventors: Palghat Ramesh, Peter Paul