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).
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Publication number: 20240098368Abstract: 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: ApplicationFiled: September 21, 2022Publication date: March 21, 2024Inventors: Patrick A. Carroll, Ajay Ramesh, Ashwini Dwarakanath, David A. Silverstein, David R. Pope, Michael W. Tao, Terence N. Tam, Vitanshu Sharma
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Publication number: 20230320577Abstract: 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: ApplicationFiled: May 1, 2023Publication date: October 12, 2023Applicant: Stryker CorporationInventors: William Huei Liang CHANG, Bryan LARSON, John SHEN, Benjamin FEINGOLD, Ajay RAMESH
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Publication number: 20230314788Abstract: 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: ApplicationFiled: June 5, 2023Publication date: October 5, 2023Applicant: Stryker CorporationInventors: Gregory G. OTTERSTROM, Ajay RAMESH, Hannah LAWRENCE, Candice PACK, Richard I. PALMISANO
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Publication number: 20230270324Abstract: 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: ApplicationFiled: May 1, 2023Publication date: August 31, 2023Applicant: Stryker CorporationInventors: William Huei Liang CHANG, Bryan LARSON, John SHEN, Benjamin FEINGOLD, Ajay RAMESH
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Patent number: 11668922Abstract: 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: GrantFiled: November 8, 2021Date of Patent: June 6, 2023Assignee: Stryker CorporationInventors: Gregory G. Otterstrom, Ajay Ramesh, Hannah Lawrence, Candice Pack, Richard I. Palmisano
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Publication number: 20230165658Abstract: 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: ApplicationFiled: November 29, 2022Publication date: June 1, 2023Applicant: Stryker CorporationInventors: William H. L. CHANG, Chien Mien PANG, Ajay RAMESH, Danny NGUYEN
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Patent number: 11638517Abstract: 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: GrantFiled: January 16, 2020Date of Patent: May 2, 2023Assignee: Stryker CorporationInventors: William Huei Liang Chang, Bryan Larson, John Shen, Benjamin Feingold, Ajay Ramesh
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Publication number: 20220192476Abstract: 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: ApplicationFiled: December 21, 2021Publication date: June 23, 2022Applicant: Stryker CorporationInventors: Chien Mien PANG, Eric Charles HUYNH, Ajay RAMESH, William H. L. CHANG
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Publication number: 20220110512Abstract: 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: ApplicationFiled: October 8, 2021Publication date: April 14, 2022Applicant: Stryker CorporationInventors: Chien Mien PANG, Eric Charles HUYNH, Ajay RAMESH, Levey TRAN, William H. L. CHANG, Andrew Morgan ROBINSON
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Publication number: 20220057622Abstract: 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: ApplicationFiled: November 8, 2021Publication date: February 24, 2022Applicant: Stryker CorporationInventors: Gregory G. OTTERSTROM, Ajay RAMESH, Hannah LAWRENCE, Candice PACK, Richard I. PALMISANO
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Patent number: 11169370Abstract: 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: GrantFiled: June 22, 2020Date of Patent: November 9, 2021Assignee: Stryker CorporationInventors: Gregory G. Otterstrom, Ajay Ramesh, Hannah Lawrence, Candice Pack, Richard I. Palmisano
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Publication number: 20210275000Abstract: 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: ApplicationFiled: March 4, 2021Publication date: September 9, 2021Applicant: Stryker CorporationInventors: Ajay RAMESH, Chien Mien PANG
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Publication number: 20210058559Abstract: 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: ApplicationFiled: May 2, 2019Publication date: February 25, 2021Applicant: Stryker CorporationInventors: Levey Trac TRAN, Chien Mien PANG, Ajay RAMESH, Rohit SUBRAMANIAN, Pankaj SHARMA
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Publication number: 20210011274Abstract: 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: ApplicationFiled: June 22, 2020Publication date: January 14, 2021Applicant: Stryker CorporationInventors: Gregory G. OTTERSTROM, Ajay RAMESH, Hannah LAWRENCE, Candice PACK, Richard I. PALMISANO
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Publication number: 20210007590Abstract: 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: ApplicationFiled: June 22, 2020Publication date: January 14, 2021Applicant: Stryker CorporationInventors: Ajay RAMESH, Perry HU, Harman SINGH, Chien Mien PANG, Vasudev NAMBAKAM
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Publication number: 20200234439Abstract: 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: ApplicationFiled: January 16, 2020Publication date: July 23, 2020Applicant: Stryker CorporationInventors: William CHANG, Bryan LARSON, John SHEN, Benjamin FEINGOLD, Ajay RAMESH
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Patent number: 10687697Abstract: 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: GrantFiled: March 14, 2014Date of Patent: June 23, 2020Assignee: Stryker CorporationInventors: Ajay Ramesh, Perry Hu, Harman Singh, Chien Mien Pang, Vasudev Nambakam
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Patent number: 10690904Abstract: 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: GrantFiled: March 14, 2017Date of Patent: June 23, 2020Assignee: Stryker CorporationInventors: Gregory G. Otterstrom, Ajay Ramesh, Hannah Lawrence, Candice Pack, Richard I. Palmisano
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Patent number: 10538636Abstract: 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: GrantFiled: October 9, 2017Date of Patent: January 21, 2020Assignee: The University of AkronInventors: Coleen Pugh, Ajay Ramesh Amrutkar
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Patent number: 10500368Abstract: 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: GrantFiled: February 2, 2017Date of Patent: December 10, 2019Inventors: Germain Jean-Charles, Ajay Ramesh Kashi