Patents by Inventor Sujata Das

Sujata Das 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: 10554956
    Abstract: A depth-based computational photography method includes recording a first image using a stereoscopic camera system, establishing a disparity map, via a processor, of the first image including a determination of pixel distance between features in the first image and the features in a second image, determining a histogram of pixel disparity values from the disparity map, and removing statistical outlier pixel disparity values. The method further includes identifying holes in disparity map of the first image and computationally shrinking holes in the disparity map via averaging disparity map values based on radially sampled areas proximate to the hole and sharpening histogram pixel disparity value peaks by shifting pixel disparity values in a close neighborhood range of a histogram pixel disparity value peak maximum closer to a pixel disparity value at the histogram pixel disparity value peak maximum.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: February 4, 2020
    Assignee: Dell Products, LP
    Inventor: Sujata Das
  • Patent number: 10139930
    Abstract: An information handling system touchscreen display interacts with totem devices by recognizing and tracking spectral signatures of the totem devices so that totem positions are reported as a single length, width and rotational orientation message to a host operating system. Ignore zones and hysteresis time periods are defined from the position message based upon totem context so that the host operating system processes touchscreen inputs with minimal latency and improved accuracy. Communication and battery charging are provided to the totem by the touchscreen display will illumination directed to the totem position.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: November 27, 2018
    Assignee: Dell Products L.P.
    Inventors: Jace W. Files, Larry A. Stone, Mark S. Sears, Yagiz C. Yildiz, Sujata Das
  • Publication number: 20180129347
    Abstract: An information handling system touchscreen display interacts with totem devices by recognizing and tracking spectral signatures of the totem devices so that totem positions are reported as a single length, width and rotational orientation message to a host operating system. Ignore zones and hysteresis time periods are defined from the position message based upon totem context so that the host operating system processes touchscreen inputs with minimal latency and improved accuracy. Communication and battery charging are provided to the totem by the touchscreen display will illumination directed to the totem position.
    Type: Application
    Filed: November 9, 2016
    Publication date: May 10, 2018
    Applicant: Dell Products L.P.
    Inventors: Jace W. Files, Larry A. Stone, Mark S. Sears, Yagiz C. Yildiz, Sujata Das
  • Publication number: 20170127046
    Abstract: A depth-based computational photography method includes recording a first image using a stereoscopic camera system, establishing a disparity map, via a processor, of the first image including a determination of pixel distance between features in the first image and the features in a second image, determining a histogram of pixel disparity values from the disparity map, and removing statistical outlier pixel disparity values. The method further includes identifying holes in disparity map of the first image and computationally shrinking holes in the disparity map via averaging disparity map values based on radially sampled areas proximate to the hole and sharpening histogram pixel disparity value peaks by shifting pixel disparity values in a close neighborhood range of a histogram pixel disparity value peak maximum closer to a pixel disparity value at the histogram pixel disparity value peak maximum.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 4, 2017
    Inventor: Sujata Das
  • Patent number: 9009477
    Abstract: In various embodiments, a computerized method includes receiving electronic content to be archived. The electronic content comprises a digital signature. The method may include archiving the digital signature, by determining a validity status of the digital signature and storing the validity status in the electronic content. The method may also include archiving the electronic content after the validity status has been stored in the electronic content.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: April 14, 2015
    Assignee: Adobe Systems Incorporated
    Inventor: Sujata Das
  • Patent number: 8688997
    Abstract: One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if teens of a license agreement associated with the digital certificate are violated.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: April 1, 2014
    Assignee: Adobe Systems Incorporated
    Inventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV
  • Publication number: 20140032927
    Abstract: In various embodiments, a computerized method includes receiving electronic content to be archived. The electronic content comprises a digital signature. The method may include archiving the digital signature, by determining a validity status of the digital signature and storing the validity status in the electronic content. The method may also include archiving the electronic content after the validity status has been stored in the electronic content.
    Type: Application
    Filed: August 20, 2013
    Publication date: January 30, 2014
    Applicant: Adobe Systems Incorporated
    Inventor: Sujata Das
  • Patent number: 8621222
    Abstract: In various embodiments, a computerized method includes receiving electronic content to be archived. The electronic content comprises a digital signature. The method also includes archiving the digital signature, wherein archiving of the digital signature comprises determining a validity status of the digital signature and storing the validity status in the electronic content. The method includes archiving the electronic content after the validity status has been stored in the electronic content. The method includes storing the archived electronic content and the attestation signature into a machine-readable medium.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: December 31, 2013
    Assignee: Adobe Systems Incorporated
    Inventor: Sujata Das
  • Publication number: 20130124869
    Abstract: One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if teens of a license agreement associated with the digital certificate are violated.
    Type: Application
    Filed: September 9, 2011
    Publication date: May 16, 2013
    Inventors: Sujata Das, Sunil C. Agrawal, Charles R. Meyers, IV
  • Patent number: 8024561
    Abstract: One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if teens of a license agreement associated with the digital certificate are violated.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: September 20, 2011
    Assignee: Adobe Systems Incorporated
    Inventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV
  • Patent number: 7581106
    Abstract: One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if terms of a license agreement associated with the digital certificate are violated.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: August 25, 2009
    Assignee: Adobe Systems Incorporated
    Inventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV
  • Patent number: 6950209
    Abstract: A host-based method for identifying an area within a color layer of a page that is not to be painted when producing a final output page. The method includes identifying an object that is to be overprinted and has a color definition that specifies color data for less than all of the color layers in the page, generating a knockout object associated with the identified object and appending the knockout object to the page.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: September 27, 2005
    Assignee: Adobe Systems Incorporated
    Inventor: Sujata Das
  • Patent number: 6768494
    Abstract: A method and system for correcting areas of a page that may produce hue shifts when executing a color conversion process on the page from a source color space to a destination color space. The page includes one or more objects including unspecified color points. The method includes determining when a predetermined amount of hue shift will occur in the color conversion process for the object from the source color space to the destination color space. If the amount of hue shift exceeds the predetermined amount, the method includes generating color data for all unspecified color points in the source color space and color converting the object from the source color space to the destination color space.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: July 27, 2004
    Assignee: Adobe Systems, Incorporated
    Inventors: Sujata Das, Michelle R. Dalton