Patents by Inventor Guangcan Liu

Guangcan Liu 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: 8238660
    Abstract: This disclosure describes an integrated framework for class-unsupervised object segmentation. The class-unsupervised object segmentation occurs by integrating top-down constraints and bottom-up constraints on object shapes using an algorithm in an integrated manner. The algorithm describes a relationship among object parts and superpixels. This process forms object shapes with object parts and oversegments pixel images into the superpixels, with the algorithm in conjunction with the constraints. This disclosure describes computing a mask map from a hybrid graph, segmenting the image into a foreground object and a background, and displaying the foreground object from the background.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: August 7, 2012
    Assignee: Microsoft Corporation
    Inventors: Zhouchen Lin, Guangcan Liu, Xiaoou Tang
  • Publication number: 20110206276
    Abstract: This disclosure describes an integrated framework for class-unsupervised object segmentation. The class-unsupervised object segmentation occurs by integrating top-down constraints and bottom-up constraints on object shapes using an algorithm in an integrated manner. The algorithm describes a relationship among object parts and superpixels. This process forms object shapes with object parts and oversegments pixel images into the superpixels, with the algorithm in conjunction with the constraints. This disclosure describes computing a mask map from a hybrid graph, segmenting the image into a foreground object and a background, and displaying the foreground object from the background.
    Type: Application
    Filed: May 4, 2011
    Publication date: August 25, 2011
    Applicant: Microsoft Corporation
    Inventors: Zhouchen Lin, Guangcan Liu, Xiaoou Tang
  • Patent number: 7995841
    Abstract: This disclosure describes an integrated framework for class-unsupervised object segmentation. The class-unsupervised object segmentation occurs by integrating top-down constraints and bottom-up constraints on object shapes using an algorithm in an integrated manner. The algorithm describes a relationship among object parts and superpixels. This process forms object shapes with object parts and oversegments pixel images into the superpixels, with the algorithm in conjunction with the constraints. This disclosure describes computing a mask map from a hybrid graph, segmenting the image into a foreground object and a background, and displaying the foreground object from the background.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: August 9, 2011
    Assignee: Microsoft Corporation
    Inventors: Zhouchen Lin, Guangcan Liu, Xiaoou Tang
  • Publication number: 20100067799
    Abstract: A “globally invariant Radon feature transform,” or “GIRFT,” generates feature descriptors that are both globally affine invariant and illumination invariant. These feature descriptors effectively handle intra-class variations resulting from geometric transformations and illumination changes to provide robust texture classification. In general, GIRFT considers images globally to extract global features that are less sensitive to large variations of material in local regions. Geometric affine transformation invariance and illumination invariance is achieved by converting original pixel represented images into Radon-pixel images by using a Radon Transform. Canonical projection of the Radon-pixel image into a quotient space is then performed using Radon-pixel pairs to produce affine invariant feature descriptors. Illumination invariance of the resulting feature descriptors is then achieved by defining an illumination invariant distance metric on the feature space of each feature descriptor.
    Type: Application
    Filed: September 17, 2008
    Publication date: March 18, 2010
    Applicant: MICROSOFT CORPORATION
    Inventors: Guangcan Liu, Zhouchen Lin, Xiaoou Tang
  • Publication number: 20090080774
    Abstract: This disclosure describes an integrated framework for class-unsupervised object segmentation. The class-unsupervised object segmentation occurs by integrating top-down constraints and bottom-up constraints on object shapes using an algorithm in an integrated manner. The algorithm describes a relationship among object parts and superpixels. This process forms object shapes with object parts and oversegments pixel images into the superpixels, with the algorithm in conjunction with the constraints. This disclosure describes computing a mask map from a hybrid graph, segmenting the image into a foreground object and a background, and displaying the foreground object from the background.
    Type: Application
    Filed: September 24, 2007
    Publication date: March 26, 2009
    Applicant: Microsoft Corporation
    Inventors: Zhouchen Lin, Guangcan Liu, Xiaoou Tang