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).
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Patent number: 10554956Abstract: 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: GrantFiled: October 29, 2015Date of Patent: February 4, 2020Assignee: Dell Products, LPInventor: Sujata Das
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Patent number: 10139930Abstract: 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: GrantFiled: November 9, 2016Date of Patent: November 27, 2018Assignee: Dell Products L.P.Inventors: Jace W. Files, Larry A. Stone, Mark S. Sears, Yagiz C. Yildiz, Sujata Das
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Publication number: 20180129347Abstract: 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: ApplicationFiled: November 9, 2016Publication date: May 10, 2018Applicant: Dell Products L.P.Inventors: Jace W. Files, Larry A. Stone, Mark S. Sears, Yagiz C. Yildiz, Sujata Das
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Publication number: 20170127046Abstract: 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: ApplicationFiled: October 29, 2015Publication date: May 4, 2017Inventor: Sujata Das
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Patent number: 9009477Abstract: 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: GrantFiled: August 20, 2013Date of Patent: April 14, 2015Assignee: Adobe Systems IncorporatedInventor: Sujata Das
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Patent number: 8688997Abstract: 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: GrantFiled: September 9, 2011Date of Patent: April 1, 2014Assignee: Adobe Systems IncorporatedInventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV
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Publication number: 20140032927Abstract: 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: ApplicationFiled: August 20, 2013Publication date: January 30, 2014Applicant: Adobe Systems IncorporatedInventor: Sujata Das
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Patent number: 8621222Abstract: 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: GrantFiled: May 30, 2008Date of Patent: December 31, 2013Assignee: Adobe Systems IncorporatedInventor: Sujata Das
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Publication number: 20130124869Abstract: 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: ApplicationFiled: September 9, 2011Publication date: May 16, 2013Inventors: Sujata Das, Sunil C. Agrawal, Charles R. Meyers, IV
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Patent number: 8024561Abstract: 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: GrantFiled: July 22, 2009Date of Patent: September 20, 2011Assignee: Adobe Systems IncorporatedInventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV
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Patent number: 7581106Abstract: 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: GrantFiled: April 20, 2005Date of Patent: August 25, 2009Assignee: Adobe Systems IncorporatedInventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV
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Patent number: 6950209Abstract: 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: GrantFiled: February 7, 2000Date of Patent: September 27, 2005Assignee: Adobe Systems IncorporatedInventor: Sujata Das
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Patent number: 6768494Abstract: 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: GrantFiled: February 7, 2000Date of Patent: July 27, 2004Assignee: Adobe Systems, IncorporatedInventors: Sujata Das, Michelle R. Dalton