Patents by Inventor Yequing (Juliet) Zhang

Yequing (Juliet) Zhang 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).

  • Methods and systems for achieving print uniformity using reduced memory or computational requirements
    Patent number: 8705120
    Abstract: Engine response curves (RCs) can be used for streak compensation for printed documents. A feedback control paradigm can be included to effect RC compensation. Singular Value Decomposition (SVD) can be used to represent each RC in the collection of spatial RC data as a linear combination of basis vectors. RCs are approximated by selecting the first few basis vectors, the approximation aiding in noise rejection and reducing computation in the controller by reducing dimensionality of the RC data from gray levels to the number of SVD bases selected. An optimal subset of RCs is selectable from the set of approximated RCs by clustering the SVD weights, the clustered SVD weights producing TRCs that span all engine response RCs generated by a printer. Compensation RCs are constructible using reduced number of bases and clustered SVD weights.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: April 22, 2014
    Assignee: Xerox Corporation
    Inventors: Yequing (Juliet) Zhang, Daniel E. Viassolo, Susan J. Zoltner, Howard A. Mizes, Robert P. Loce
  • METHODS AND SYSTEMS ACHIEVING PRINT UNIFORMITY USING REDUCED MEMORY OR COMPUTATIONAL REQUIREMENTS
    Publication number: 20100231942
    Abstract: Engine response curves (RCs) can be used for streak compensation for printed documents. A feedback control paradigm can be included to effect RC compensation. Singular Value Decomposition (SVD) can be used to represent each RC in the collection of spatial RC data as a linear combination of basis vectors. RCs are approximated by selecting the first few basis vectors, the approximation aiding in noise rejection and reducing computation in the controller by reducing dimensionality of the RC data from gray levels to the number of SVD bases selected. An optimal subset of RCs is selectable from the set of approximated RCs by clustering the SVD weights, the clustered SVD weights producing TRCs that span all engine response RCs generated by a printer. Compensation RCs are constructible using reduced number of bases and clustered SVD weights.
    Type: Application
    Filed: May 25, 2010
    Publication date: September 16, 2010
    Inventors: Yequing (Juliet) Zhang, Daniel E. Viassolo, Susan J. Zoltner, Howard A. Mizes, Robert P. Loce