Patents by Inventor Abhijit Sarkar

Abhijit Sarkar 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: 10648862
    Abstract: Sensor calibration methods and systems can for providing accurate color values are disclosed. In one example, a method includes obtaining color measurements that indicate an amount of ambient light, as well as clustering the color measurements, and storing cluster parameters for the clustered color measurements. The method can further include automatic calculation of, for each cluster, generic transformation parameters for conversion of a color measurement to a calibrated color value. In another example, a method can include exposing a light sensor to a calibration ambient lighting, calculating sensor correction parameters for the light sensor, and storing the calculated parameters. As an additional example, an electronic device is adapted to determine calibrated color values with machine readable media storing cluster parameters, sensor correction parameters, and generic transform parameters used by the electronic device to calculate calibrated color values for ambient light sensor measurements.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: May 12, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Abhijit Sarkar, Samu Matias Kallio, Kari Jussi Ropo
  • Publication number: 20200029061
    Abstract: A method for digital image color conversion includes, at a first computing device, capturing a first digital image of a first real-world environment. Based on ambient lighting conditions of the first real-world environment, a first ambient lighting-agnostic digital image is generated using a capture-side ambient lighting color conversion. The first ambient lighting-agnostic digital image is transmitted to a second computing device in a second real-world environment. From the second computing device, a second ambient lighting-agnostic digital image is received, the second image having been generated by the second computing device from a second digital image using the capture-side ambient lighting color conversion. Based on the ambient lighting conditions of the first real-world environment, a lighting-corrected digital image is generated from the second ambient lighting-agnostic digital image using a display-side ambient lighting color conversion.
    Type: Application
    Filed: July 23, 2018
    Publication date: January 23, 2020
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Abhijit SARKAR, Zhenhuan WEN
  • Publication number: 20190331141
    Abstract: A fluid conduit includes, a body, a first conduit portion connected to the body, a second conduit portion connected to the body, and a base connected to the second conduit portion. The body, the first conduit portion, the second conduit portion, and the base may be formed as a monolithic component via additive manufacturing. A method of making a fluid conduit may include forming sets of layers. The set of layers may include parts or portions of the fluid conduit and/or supports.
    Type: Application
    Filed: April 30, 2018
    Publication date: October 31, 2019
    Inventors: Frank T. Crawford, Subrata Sarkar, Abhijit Borawake, Sean Brown, Lucas Stahl
  • Publication number: 20190301932
    Abstract: Sensor calibration methods and systems can for providing accurate color values are disclosed. In one example, a method includes obtaining color measurements that indicate an amount of ambient light, as well as clustering the color measurements, and storing cluster parameters for the clustered color measurements. The method can further include automatic calculation of, for each cluster, generic transformation parameters for conversion of a color measurement to a calibrated color value. In another example, a method can include exposing a light sensor to a calibration ambient lighting, calculating sensor correction parameters for the light sensor, and storing the calculated parameters. As an additional example, an electronic device is adapted to determine calibrated color values with machine readable media storing cluster parameters, sensor correction parameters, and generic transform parameters used by the electronic device to calculate calibrated color values for ambient light sensor measurements.
    Type: Application
    Filed: April 3, 2018
    Publication date: October 3, 2019
    Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Abhijit SARKAR, Samu Matias KALLIO, Kari Jussi ROPO
  • Patent number: 10345151
    Abstract: Systems and methods for determining a colorimetric value from color measurements for multiple ambient color sensors which for each color measurement, in various approaches, select a lighting cluster similar to the color measurement and determine whether the color measurement is valid or invalid based on a calculated similarity between the color measurement and the selected lighting cluster, calculate a weight for the color measurement for combination with other color measurements based on the calculated similarity between the color measurement and its selected lighting cluster, determine whether the color measurement is valid or invalid based on perceptual color space distances for the color measurement for multiple reference light sources, and/or calculate a weight for the color measurement for combination with other color measurements based on the perceptual color space distances for multiple reference light sources.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: July 9, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Abhijit Sarkar, Stefan Angelevski, Samu Matias Kallio, Hiroo Umeno
  • Patent number: 10267677
    Abstract: Calibrated brightness estimation using an ambient color sensor, involving determination and use of lighting cluster parameters effective for automatically identifying which of multiple lighting clusters is associated with a color measurement obtained for the ambient color sensor, and per-cluster sensor brightness estimation factors for each of the first plurality of lighting clusters.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: April 23, 2019
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Abhijit Sarkar, Shibu Kizhakke Vallathai
  • Patent number: 10218952
    Abstract: Innovations in rendering of high dynamic range (“HDR”) video on a display device having enhanced dynamic range (“EDR”). The peak brightness for an EDR display device is lower than the peak brightness for a typical HDR display device but higher than the peak brightness for a typical display device having standard dynamic range. The increased range of brightness values in an EDR display device can be utilized effectively to show bright highlights of the HDR video. For example, decision logic is configured to evaluate a peak brightness of a target display device and select an HDR-to-EDR tone mapping mode. A tone mapper is configured to apply tone mapping to input values for the sample values of HDR video, according to a tone mapping function, thereby producing output values for sample values of EDR video.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: February 26, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Matthew Wozniak, Mehmet Kucukgoz, Abhijit Sarkar
  • Publication number: 20180267946
    Abstract: Systems and techniques for storing an electronic document signed during an electronic document signing process. A computing device receives an electronic document that includes content within a content area, an image field positioned on the content area, and a cross sign field positioned partially on the image field and partially on the content area. The computing device receives an image to populate the image field and a signature to populate the cross sign field. The computing devices creates a first signature portion and a second signature portion by splitting the signature. The image is modified with the first signature portion and the content area is modified with the second signature portion. The computing device stores the electronic document by storing a file having separate elements, the separate elements including the modified content area and the modified image, without including the complete signature, unaltered content area, or unaltered image.
    Type: Application
    Filed: March 15, 2017
    Publication date: September 20, 2018
    Inventors: Nikhil DANG, Ankit MATHUR, Abhijit SARKAR
  • Publication number: 20180152686
    Abstract: Innovations in rendering of high dynamic range (“HDR”) video on a display device having enhanced dynamic range (“EDR”) are described. The peak brightness for an EDR display device is lower than the peak brightness for a typical HDR display device but higher than the peak brightness for a typical display device having standard dynamic range. The increased range of brightness values in an EDR display device can be utilized effectively to show bright highlights of the HDR video. For example, decision logic is configured to evaluate a peak brightness of a target display device and select an HDR-to-EDR tone mapping mode. A tone mapper is configured to apply tone mapping to input values for the sample values of HDR video, according to a tone mapping function, thereby producing output values for sample values of EDR video.
    Type: Application
    Filed: December 20, 2016
    Publication date: May 31, 2018
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Matthew Wozniak, Mehmet Kucukgoz, Abhijit Sarkar
  • Publication number: 20180152684
    Abstract: Innovations in rendering of high dynamic range (“HDR”) video on a display device having enhanced dynamic range (“EDR”) are described. The peak brightness for an EDR display device is lower than the peak brightness for a typical HDR display device but higher than the peak brightness for a typical display device having standard dynamic range. The increased range of brightness values in an EDR display device can be utilized effectively to show bright highlights of the HDR video. For example, decision logic is configured to evaluate a peak brightness of a target display device and select an HDR-to-EDR tone mapping mode. A tone mapper is configured to apply tone mapping to input values for the sample values of HDR video, according to a tone mapping function, thereby producing output values for sample values of EDR video.
    Type: Application
    Filed: December 20, 2016
    Publication date: May 31, 2018
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Matthew Wozniak, Mehmet Kucukgoz, Abhijit Sarkar
  • Patent number: 9710890
    Abstract: In some embodiments, color and contrast enhancement video processing may be done in one shot instead of adjusting one of color and contrast enhancement, then the other, and then going back to the first one to readjust because of the second adjustment. In some embodiments, global lightness adjustment, local contrast enhancement, and saturation enhancement may be done at the same time and in parallel. Lightness adjustment improves visibility of details for generally dark or generally light images without changing intended lighting conditions in the original shot, and is used to enhance the range of color/saturation enhancement. Local contrast enhancement done in parallel improves visual definition of objects and textures and thus local contrast and perceived sharpness.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: July 18, 2017
    Assignee: Intel Corporation
    Inventors: Abhijit Sarkar, Jorge E. Caviedes, Mahesh Subedar
  • Patent number: 9378564
    Abstract: A method, non-transitory medium and color correction computing device that identifies an area of interest in a digital image comprising a plurality of pixels. A white point in the identified area of interest is determined. One or more corrected colorimetric data points are determined for each of the plurality of pixels in the identified area of interest based on the determined white point. One or more output colors in the digital image are corrected using the determined one or more corrected colorimetric data points.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: June 28, 2016
    Assignee: ColorModules Inc.
    Inventor: Abhijit Sarkar
  • Publication number: 20150235348
    Abstract: In some embodiments, color and contrast enhancement video processing may be done in one shot instead of adjusting one of color and contrast enhancement, then the other, and then going back to the first one to readjust because of the second adjustment. In some embodiments, global lightness adjustment, local contrast enhancement, and saturation enhancement may be done at the same time and in parallel. Lightness adjustment improves visibility of details for generally dark or generally light images without changing intended lighting conditions in the original shot, and is used to enhance the range of color/saturation enhancement. Local contrast enhancement done in parallel improves visual definition of objects and textures and thus local contrast and perceived sharpness.
    Type: Application
    Filed: May 5, 2015
    Publication date: August 20, 2015
    Inventors: Abhijit Sarkar, Jorge E. Caviedes, Mahesh Subedar
  • Patent number: 9053523
    Abstract: In some embodiments, color and contrast enhancement video processing may be done in one shot instead of adjusting one of color and contrast enhancement, then the other, and then going back to the first one to readjust because of the second adjustment. In some embodiments, global lightness adjustment, local contrast enhancement, and saturation enhancement may be done at the same time and in parallel. Lightness adjustment improves visibility of details for generally dark or generally light images without changing intended lighting conditions in the original shot, and is used to enhance the range of color/saturation enhancement. Local contrast enhancement done in parallel improves visual definition of objects and textures and thus local contrast and perceived sharpness.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: June 9, 2015
    Assignee: Intel Corporation
    Inventors: Abhijit Sarkar, Jorge E. Caviedes, Mahesh Subedar
  • Publication number: 20140247984
    Abstract: A method, non-transitory medium and color correction computing device that identifies an area of interest in a digital image comprising a plurality of pixels. A white point in the identified area of interest is determined. One or more corrected colorimetric data points are determined for each of the plurality of pixels in the identified area of interest based on the determined white point. One or more output colors in the digital image are corrected using the determined one or more corrected colorimetric data points.
    Type: Application
    Filed: March 3, 2014
    Publication date: September 4, 2014
    Applicant: ColorModules Inc.
    Inventor: Abhijit Sarkar
  • Patent number: 8791222
    Abstract: This invention concerns a polymer coating composition for use as non-focal optical power limiting dye containing polymeric materials. This composition contains: (1) one or more Modified Polymers comprising a Polymer, such as a hyperbranched polymer family, especially HB-PCS, HB-PU, HB-PUSOX or PC with one or more of: a) reverse saturable dye (RSA), b) multi-photon absorption dye (MPA), c) an azo dye, or d) absorption dye, which dye is chemically bonded to the pendant groups of the Polymer (along its chain and/or termini) or which forms a part of the backbone of the Polymer; (2) carbon nanotubes (CNT) as optical power limiters (OPL); and (3) a self-focusing component.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: July 29, 2014
    Assignee: Oxazogen, Inc.
    Inventors: Abhijit Sarkar, Petar R. Dvornic, James P. Godschalx
  • Patent number: 8709305
    Abstract: This invention concerns a polymer coating material composition (PCM) comprising as components a Polymer Matrix, carbon nanotubes (CNT) as optical power limiters (OPL), and carbon-rich molecules. One aspect of the invention is where the Polymer Matrix is a hyperbranched polymer, such as a hyperbranched polycarbosiloxane polymer. Another aspect of the invention is where the CNT is a short multiwall carbon nanotube (sMWNT). A further aspect of the invention is where the carbon-rich molecules are triethoxysilyl anthracene derivatives. The composition wherein the ratio in weight percent of Polymer Matrix to CNT to carbon-rich molecule is from 94:3:3 to 99.8:0.1:0.1. The composition can further contain one or more of multi-photon absorbers (MPA) chromophores or reverse saturable absorbers (RSA) chromophores. These compositions can be used as: a) a film, b) a coating, c) a liquid, d) a solution, or e) a sandwiched film between two transparent substrates.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: April 29, 2014
    Assignee: Oxazogen, Inc.
    Inventor: Abhijit Sarkar
  • Patent number: 8709307
    Abstract: This invention concerns a polymer coating material composition (PCM) comprising as components a polymer matrix, carbon nanotubes (CNT) as optical power limiters (OPL), and carbon rich molecules. One aspect of the invention is where the Polymer Matrix is a hyperbranched polymer, such as a hyperbranched polycarbosiloxane polymer. Another aspect of the invention is where the CNT is a short multiwall carbon nanotube (sMWNT). A further aspect of the invention is where the carbon-rich molecules are triethoxysilyl anthracene derivatives. The composition wherein the ratio in weight percent of Polymer Matrix to CNT to carbon-rich molecule is from 94:3:3 to 99.8:0.1:0.1. The composition can further contain one or more of multi-photon absorbers (MPA) chromophores or reverse saturable absorbers (RSA) chromophores. These compositions can be used as: a) a film, b) a coating, c) a liquid, d) a solution, or e) a sandwiched film between two transparent substrates.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: April 29, 2014
    Assignee: Oxazogen, Inc.
    Inventors: Abhijit Sarkar, George Rayfield
  • Publication number: 20140044352
    Abstract: In some embodiments, color and contrast enhancement video processing may be done in one shot instead of adjusting one of color and contrast enhancement, then the other, and then going back to the first one to readjust because of the second adjustment. In some embodiments, global lightness adjustment, local contrast enhancement, and saturation enhancement may be done at the same time and in parallel. Lightness adjustment improves visibility of details for generally dark or generally light images without changing intended lighting conditions in the original shot, and is used to enhance the range of color/saturation enhancement. Local contrast enhancement done in parallel improves visual definition of objects and textures and thus local contrast and perceived sharpness.
    Type: Application
    Filed: June 21, 2013
    Publication date: February 13, 2014
    Inventors: Abhijit Sarkar, Jorge E. Caviedes, Mahesh Subedar
  • Patent number: 8565521
    Abstract: Preferably, seven classes of observers are defined, according to different sets of Color Matching Functions. By displaying specific color patches of a classification chart using color display devices having different sets of primaries, and by asking an actual observer to compare his perception of the same color as displayed on each color display device, the method allows assigning said observer his specific class. It is proposed a specific apparatus to implement this method.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: October 22, 2013
    Assignee: Thomson Licensing
    Inventors: Abhijit Sarkar, Laurent Blonde, Patrick Morvan, Marine Le Breton