Patents by Inventor Ajay RAMESH

Ajay 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).

  • Publication number: 20240098368
    Abstract: Devices, methods, and non-transitory program storage devices are disclosed herein to perform predictive image sensor cropping operations to improve the performance of video image stabilization operations, especially for high resolution image sensors. According to some embodiments, the techniques include, for each of one or more respective images of a first plurality of images: obtaining image information corresponding to one or more images in the first plurality of images captured prior to the respective image; predicting, for the respective image, an image sensor cropping region to be read out from the first image sensor; and then reading out, into a memory, a first cropped version of the respective image comprising only the predicted image sensor cropping region for the respective image. Then, a first video may be produced based, at least in part, on the first cropped versions of the one or more respective images of the first plurality of images.
    Type: Application
    Filed: September 21, 2022
    Publication date: March 21, 2024
    Inventors: Patrick A. Carroll, Ajay Ramesh, Ashwini Dwarakanath, David A. Silverstein, David R. Pope, Michael W. Tao, Terence N. Tam, Vitanshu Sharma
  • Publication number: 20230320577
    Abstract: A system includes an illumination source and an imaging apparatus that includes an electronic rolling shutter imager and is configured for sequentially resetting rows of pixels of the rolling shutter imager from a first row to a last row, sequentially reading charge accumulated at the rows of pixels from the first row to the last row, wherein the first row is read after resetting the last row, controlling the illumination source to illuminate the tissue of the subject with illumination light for an illumination period that lasts longer than a vertical blanking period, wherein the vertical blanking period is the period from the resetting of the last row to the reading of the first row, and generating an image frame from the readings of charge accumulated at the rows of pixels, wherein at least one reading of charge accumulated at a row of pixels is removed or replaced.
    Type: Application
    Filed: May 1, 2023
    Publication date: October 12, 2023
    Applicant: Stryker Corporation
    Inventors: William Huei Liang CHANG, Bryan LARSON, John SHEN, Benjamin FEINGOLD, Ajay RAMESH
  • Publication number: 20230314788
    Abstract: A light source includes a first LED to provide light of a first light wavelength spectrum along a first light path; a second LED to provide light of a second light wavelength spectrum along a second light path; a dichroic filter for passing light emitted from at least one of the first LED and the second LED and reflecting light emitted from at least one of the first LED and the second LED; an optical filter movable between a first position in which the optical filter receives light from the first light path and a second position of which the optical filter does not receive light from the first light path; a light output; a controller which is capable of switching the light source between a first mode for providing a first light to the light output and a second mode for providing a second light to the light output.
    Type: Application
    Filed: June 5, 2023
    Publication date: October 5, 2023
    Applicant: Stryker Corporation
    Inventors: Gregory G. OTTERSTROM, Ajay RAMESH, Hannah LAWRENCE, Candice PACK, Richard I. PALMISANO
  • Publication number: 20230270324
    Abstract: A method of imaging tissue of a subject using an electronic rolling shutter imager includes sequentially resetting rows of pixels of the rolling shutter imager from a first row to a last row for a first amount of time; illuminating the tissue of the subject with illumination light over an illumination period that begins once the last row of the rolling shutter imager has been reset and lasts for at least the first amount of time; accumulating charge at the rows of pixels over at least the illumination period based on light that is received from the tissue of the subject while the tissue of the subject is illuminated with the illumination light; sequentially reading charge accumulated at the rows of pixels from the first row to the last row once the illumination period has ended; and generating an image frame from the rows of pixels.
    Type: Application
    Filed: May 1, 2023
    Publication date: August 31, 2023
    Applicant: Stryker Corporation
    Inventors: William Huei Liang CHANG, Bryan LARSON, John SHEN, Benjamin FEINGOLD, Ajay RAMESH
  • Patent number: 11668922
    Abstract: A light source includes a first LED to provide light of a first light wavelength spectrum along a first light path; a second LED to provide light of a second light wavelength spectrum along a second light path; a dichroic filter for passing light emitted from at least one of the first LED and the second LED and reflecting light emitted from at least one of the first LED and the second LED; an optical filter movable between a first position in which the optical filter receives light from the first light path and a second position of which the optical filter does not receive light from the first light path; a light output; a controller which is capable of switching the light source between a first mode for providing a first light to the light output and a second mode for providing a second light to the light output.
    Type: Grant
    Filed: November 8, 2021
    Date of Patent: June 6, 2023
    Assignee: Stryker Corporation
    Inventors: Gregory G. Otterstrom, Ajay Ramesh, Hannah Lawrence, Candice Pack, Richard I. Palmisano
  • Publication number: 20230165658
    Abstract: An exemplary system for acquiring surgical imaging data comprises a surgical imaging device; an imaging controller; and a communication cable for connecting the surgical imaging device to the imaging controller, comprising: a distal end for connecting with the surgical imaging device; a proximal end for connecting with the imaging controller; a single conductor extending between the distal end and the proximal end of the communication cable, the single conductor configured to: transmit surgical imaging data from the surgical imaging device to the imaging controller, and transmit a control signal and power from the imaging controller to the surgical imaging device.
    Type: Application
    Filed: November 29, 2022
    Publication date: June 1, 2023
    Applicant: Stryker Corporation
    Inventors: William H. L. CHANG, Chien Mien PANG, Ajay RAMESH, Danny NGUYEN
  • Patent number: 11638517
    Abstract: A method of imaging tissue of a subject using an electronic rolling shutter imager includes sequentially resetting rows of pixels of the rolling shutter imager from a first row to a last row, sequentially reading charge accumulated at the rows of pixels from the first row to the last row, wherein the first row is read after resetting the last row, illuminating the tissue of the subject with illumination light for an illumination period that lasts longer than a vertical blanking period, wherein the vertical blanking period is the period from the resetting of the last row to the reading of the first row, and generating an image frame from the readings of charge accumulated at the rows of pixels, wherein at least one reading of charge accumulated at a row of pixels is removed or replaced to generate the image frame.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: May 2, 2023
    Assignee: Stryker Corporation
    Inventors: William Huei Liang Chang, Bryan Larson, John Shen, Benjamin Feingold, Ajay Ramesh
  • Publication number: 20220192476
    Abstract: A light source for illuminating a target for medical imaging include a first light emitter package comprising a first light emitter that emits light having a first wavelength band and a second light emitter that emits light having a second wavelength band that is different than the first wavelength band; and a controller for operating the light source in a first mode in which the first light emitter is activated and the second light emitter is deactivated and a second mode in which the first light emitter is deactivated and the second light emitter is activated.
    Type: Application
    Filed: December 21, 2021
    Publication date: June 23, 2022
    Applicant: Stryker Corporation
    Inventors: Chien Mien PANG, Eric Charles HUYNH, Ajay RAMESH, William H. L. CHANG
  • Publication number: 20220110512
    Abstract: A method for defogging an optical component of an endoscope includes operating an illuminator in an imaging mode in which the illuminator generates illumination light for endoscopic imaging of a target, wherein at least a portion of the illumination light is generated by a light source that generates light having a first waveband at an imaging intensity level; and changing the operating mode of the illuminator from the imaging mode to a defogging mode in which an intensity level of the light having the first waveband is increased from the imaging intensity level to a defogging intensity level to warm and defog the optical component of the endoscope.
    Type: Application
    Filed: October 8, 2021
    Publication date: April 14, 2022
    Applicant: Stryker Corporation
    Inventors: Chien Mien PANG, Eric Charles HUYNH, Ajay RAMESH, Levey TRAN, William H. L. CHANG, Andrew Morgan ROBINSON
  • Publication number: 20220057622
    Abstract: A light source includes a first LED to provide light of a first light wavelength spectrum along a first light path; a second LED to provide light of a second light wavelength spectrum along a second light path; a dichroic filter for passing light emitted from at least one of the first LED and the second LED and reflecting light emitted from at least one of the first LED and the second LED; an optical filter movable between a first position in which the optical filter receives light from the first light path and a second position of which the optical filter does not receive light from the first light path; a light output; a controller which is capable of switching the light source between a first mode for providing a first light to the light output and a second mode for providing a second light to the light output.
    Type: Application
    Filed: November 8, 2021
    Publication date: February 24, 2022
    Applicant: Stryker Corporation
    Inventors: Gregory G. OTTERSTROM, Ajay RAMESH, Hannah LAWRENCE, Candice PACK, Richard I. PALMISANO
  • Patent number: 11169370
    Abstract: A method for generating light from a medical light source includes emitting light in a visible wavelength spectrum from a first light of the medical light source, emitting light in a first infrared spectrum from a first light emitter of a second light, redirecting light emitted from the first light emitter by at least one optical element of the second light, emitting light in a second infrared spectrum from a second light emitter of the second light, and redirecting the light emitted from the second light emitter by the at least one optical element of the second light.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: November 9, 2021
    Assignee: Stryker Corporation
    Inventors: Gregory G. Otterstrom, Ajay Ramesh, Hannah Lawrence, Candice Pack, Richard I. Palmisano
  • Publication number: 20210275000
    Abstract: Systems and methods for detecting, characterizing, and addressing the type of endoscope that is connected to the camera/light source based on the image size taken using that endoscope are disclosed. Once the type of endoscope is determined, the systems and methods can adjust at least one parameter of the camera/light source based on the determination of the type of endoscope that is being used.
    Type: Application
    Filed: March 4, 2021
    Publication date: September 9, 2021
    Applicant: Stryker Corporation
    Inventors: Ajay RAMESH, Chien Mien PANG
  • Publication number: 20210058559
    Abstract: A surgical camera system comprising: a camera head including a housing; an image sensor within the housing; and the housing including a liquid lens therein for focusing an image received in the housing prior to transmission of the image to the image sensor, and a fixed solid lens adjacent the liquid lens.
    Type: Application
    Filed: May 2, 2019
    Publication date: February 25, 2021
    Applicant: Stryker Corporation
    Inventors: Levey Trac TRAN, Chien Mien PANG, Ajay RAMESH, Rohit SUBRAMANIAN, Pankaj SHARMA
  • Publication number: 20210011274
    Abstract: A method for generating light from a medical light source includes emitting light in a visible wavelength spectrum from a first light of the medical light source, emitting light in a first infrared spectrum from a first light emitter of a second light, redirecting light emitted from the first light emitter by at least one optical element of the second light, emitting light in a second infrared spectrum from a second light emitter of the second light, and redirecting the light emitted from the second light emitter by the at least one optical element of the second light.
    Type: Application
    Filed: June 22, 2020
    Publication date: January 14, 2021
    Applicant: Stryker Corporation
    Inventors: Gregory G. OTTERSTROM, Ajay RAMESH, Hannah LAWRENCE, Candice PACK, Richard I. PALMISANO
  • Publication number: 20210007590
    Abstract: A light source includes a first LED in communication with a first DAC; a second LED in communication with a second DAC; a third LED in communication with a third DAC; a color sensor capable of sensing light in the visible light spectrum; and one or more processors configured for: receiving color intensity values from the color sensor, determining whether the color intensity values are balanced to achieve white light, adjusting the current to the second DAC and third DAC until the color intensity levels are balanced to achieve white light at a combined intensity level, setting a new red LED current value, a new green LED current value, and a new blue LED current value to adjust the combined intensity level toward a target intensity level, and repeating the setting step until the target intensity level is achieved.
    Type: Application
    Filed: June 22, 2020
    Publication date: January 14, 2021
    Applicant: Stryker Corporation
    Inventors: Ajay RAMESH, Perry HU, Harman SINGH, Chien Mien PANG, Vasudev NAMBAKAM
  • Publication number: 20200234439
    Abstract: A method of imaging tissue of a subject using an electronic rolling shutter imager includes sequentially resetting rows of pixels of the rolling shutter imager from a first row to a last row, sequentially reading charge accumulated at the rows of pixels from the first row to the last row, wherein the first row is read after resetting the last row, illuminating the tissue of the subject with illumination light for an illumination period that lasts longer than a vertical blanking period, wherein the vertical blanking period is the period from the resetting of the last row to the reading of the first row, and generating an image frame from the readings of charge accumulated at the rows of pixels, wherein at least one reading of charge accumulated at a row of pixels is removed or replaced to generate the image frame.
    Type: Application
    Filed: January 16, 2020
    Publication date: July 23, 2020
    Applicant: Stryker Corporation
    Inventors: William CHANG, Bryan LARSON, John SHEN, Benjamin FEINGOLD, Ajay RAMESH
  • Patent number: 10687697
    Abstract: An endoscopic system having a light source that can operate in two modes is provided. The first mode provides a white light to an endoscope to transmit the light to a surgical site or other object, the reflection of which can be received by the endoscope and for the process. The second mode of the light source provides infrared excitation light and light in the blue and green wavelength spectra to an endoscope to transmit the light to an object such as a surgical site. The blue and green reflected light, as well as light from excitation markers, which is an infrared light at a different wavelength than the excitation infrared light, is received by the endoscope and further processed.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 23, 2020
    Assignee: Stryker Corporation
    Inventors: Ajay Ramesh, Perry Hu, Harman Singh, Chien Mien Pang, Vasudev Nambakam
  • Patent number: 10690904
    Abstract: A light source for medical or surgical procedures is provided which can provide at least three different imaging modes. Modular light engines are also provided which may be interchangeable within a light source system for increased imaging capability. Methods of using such light sources and modular light engines are also provided.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: June 23, 2020
    Assignee: Stryker Corporation
    Inventors: Gregory G. Otterstrom, Ajay Ramesh, Hannah Lawrence, Candice Pack, Richard I. Palmisano
  • Patent number: 10538636
    Abstract: Specific benzocyclobutenes serve as intramolecular or intermolecular or both intramolecular or intermolecular crosslinkers. The benzocyclobutenes can be incorporated into polymers post polymerization or can be provided as monomers that participate in homopolymerization or copolymerization with other monomer to create the polymers having benzocyclobutenes that are exploited to carry out the crosslinking. At least some of the benzocyclobutenes taught herein can be used to carry out crosslinking a ambient temperatures.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: January 21, 2020
    Assignee: The University of Akron
    Inventors: Coleen Pugh, Ajay Ramesh Amrutkar
  • Patent number: 10500368
    Abstract: A device or arrangement for a carpule for a dental syringe permits the harpoon on the distal end of the plunger rod to engage the rubber or rubber-like plug or piston of the carpule, but blocks the piston from being pulled out the open proximal end of the tubular glass body of the carpule. A preferred version has an apertured cap that fits onto the proximal end of the carpule, a retaining neck ring that fits onto the penetrable seal at the proximal end of the carpule, and a bar connecting them. The bar also serves as a grip to assist in handling the carpule.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: December 10, 2019
    Inventors: Germain Jean-Charles, Ajay Ramesh Kashi