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).

  • Patent number: 12262117
    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: Grant
    Filed: September 21, 2022
    Date of Patent: March 25, 2025
    Assignee: Apple Inc.
    Inventors: Patrick A. Carroll, Ajay Ramesh, Ashwini Dwarakanath, David A. Silverstein, David R. Pope, Michael W. Tao, Terence N. Tam, Vitanshu Sharma
  • Patent number: 12232706
    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: Grant
    Filed: June 22, 2020
    Date of Patent: February 25, 2025
    Assignee: Stryker Corporation
    Inventors: Ajay Ramesh, Perry Hu, Harman Singh, Chien Mien Pang, Vasudev Nambakam
  • Publication number: 20250031951
    Abstract: Provided herein is a method of determining an adjustment for the lens of a camera comprising: determining if liquid lens hardware is present; in accordance with determining that liquid lens hardware is present, commanding an initial voltage for the liquid lens hardware; setting a high threshold focus metric; the camera capturing an image frame and converting the image frame to data; calculating a focus metric of the image frame data and comparing the image frame data focus metric to the high threshold focus metric; and in accordance with the image frame data focus metric being higher than the high threshold focus metric, commanding a change in voltage to be delivered to the liquid lens hardware.
    Type: Application
    Filed: October 11, 2024
    Publication date: January 30, 2025
    Applicant: Stryker Corporation
    Inventors: Levey Trac TRAN, Chien Mien PANG, Ajay RAMESH, Rohit SUBRAMANIAN, Pankaj SHARMA
  • Publication number: 20250028165
    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: October 8, 2024
    Publication date: January 23, 2025
    Applicant: Stryker Corporation
    Inventors: Gregory G. OTTERSTROM, Ajay RAMESH, Hannah LAWRENCE, Candice PACK, Richard I. PALMISANO
  • Patent number: 12201271
    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: Grant
    Filed: May 1, 2023
    Date of Patent: January 21, 2025
    Assignee: Stryker Corporation
    Inventors: William Huei Liang Chang, Bryan Larson, John Shen, Benjamin Feingold, Ajay Ramesh
  • Patent number: 12201270
    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: Grant
    Filed: May 1, 2023
    Date of Patent: January 21, 2025
    Assignee: Stryker Corporation
    Inventors: William Huei Liang Chang, Bryan Larson, John Shen, Benjamin Feingold, Ajay Ramesh
  • Patent number: 12178389
    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: Grant
    Filed: March 4, 2021
    Date of Patent: December 31, 2024
    Assignee: Stryker Corporation
    Inventors: Ajay Ramesh, Chien Mien Pang
  • Patent number: 12144489
    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: Grant
    Filed: May 2, 2019
    Date of Patent: November 19, 2024
    Assignee: Stryker Corporation
    Inventors: Levey Trac Tran, Chien Mien Pang, Ajay Ramesh, Rohit Subramanian, Pankaj Sharma
  • Patent number: 12130420
    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: June 5, 2023
    Date of Patent: October 29, 2024
    Assignee: Stryker Corporation
    Inventors: Gregory G. Otterstrom, Ajay Ramesh, Hannah Lawrence, Candice Pack, Richard I. Palmisano
  • Publication number: 20240349996
    Abstract: Described herein are light sources for illuminating a target for medical imaging, the light source comprising: 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; a second light emitter package comprising a third light emitter that emits light having a third wavelength band that is different than the first and second wavelength bands; and a controller for operating the light source in a first mode in which the first light emitter and the third light emitter are 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: July 3, 2024
    Publication date: October 24, 2024
    Applicant: Stryker Corporation
    Inventors: Chien Mien PANG, Eric Charles HUYNH, Ajay RAMESH, William Huei Liang CHANG
  • Publication number: 20240335091
    Abstract: The present disclosure relates generally to medical imaging, and more specifically to techniques for providing medical fluorescence imaging with modulated illumination source. An exemplary method comprises illuminating a tissue of a subject with a white-light illumination source for a first illumination period, wherein the fluorescence excitation illumination source is off during the first illumination period; producing a first set of imaging data; illuminating the tissue of the subject with a fluorescence excitation illumination source for a second illumination period after the first illumination period, wherein the white-light illumination source is off during the second illumination period; producing a second set of imaging data; and generating one or more image frames based on the first set of imaging data and the second set of imaging data.
    Type: Application
    Filed: April 5, 2024
    Publication date: October 10, 2024
    Applicant: Stryker Corporation
    Inventors: Ajay RAMESH, William Huei Liang CHANG
  • Patent number: 12035894
    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: Grant
    Filed: December 21, 2021
    Date of Patent: July 16, 2024
    Assignee: Stryker Corporation
    Inventors: Chien Mien Pang, Eric Charles Huynh, Ajay Ramesh, William Huei Liang Chang
  • Publication number: 20240206718
    Abstract: Systems and methods for identifying optical filters within a surgical imaging device are provided. A system comprises a set of one or more light sources and a set of one or more image sensors of the surgical imaging device. The set of one or more light sources emits a set of one or more emission light pulses. The set of one or more image sensors detects reflection light of the one or more light pulses. The system determines, based at least in part on the detected reflection light, an identity of an optical filter of the surgical imaging device, wherein the optical filter is disposed in an optical collection path of the surgical imaging device.
    Type: Application
    Filed: December 21, 2023
    Publication date: June 27, 2024
    Applicant: Stryker Corporation
    Inventors: Chien Mien PANG, Levey Trac TRAN, Ajay RAMESH, Katherine Jiang LU
  • 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