Patents by Inventor Xinwu Chen

Xinwu Chen 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).

  • Publication number: 20140331114
    Abstract: A method and apparatus for obtaining partial content of a webpage and a method and apparatus for sharing partial content of a webpage. An image of an area on the webpage selected by a user is captured. Linkable elements existing in the area and positions of respective linkable elements in the area are acquired. A HTML fragment is generated based on the image, the linkable elements and their positions in the area as the obtained partial content of the webpage. By virtue of the method and apparatus, Only interested partial content of the webpage can be shared by sharers, and receivers can not only view the partial content of the webpage exactly same with what the sharers view, but also access hyperlinks on this partial content of the webpage directly in a web browser.
    Type: Application
    Filed: May 1, 2014
    Publication date: November 6, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Weizheng Shen, Xinwu Chen, Kai Li, Zengwei Liu
  • Patent number: 7620214
    Abstract: The invention relates to a human eye detection method, apparatus, system and storage medium.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: November 17, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Xin Ji, Libing Wang
  • Patent number: 7415137
    Abstract: A method of processing an image includes steps of identifying one candidate for a human face region within an image; calculating a probability that the candidate for human face region represents a human face; and saving the probability as attached information to the image. The method of processing an image can also include steps of identifying one candidate for human face region within an image; calculating a probability that the candidate for human face region represents a human face; judging whether or not the candidate for human face region represents a human face by comparing the probability with a threshold; and saving a result of the step of judging as attached information to the image. According to these methods, results of identifying candidates for human face regions will be saved to the image, and further processes to be conducted on the image can be facilitated.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: August 19, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Xin Ji, Libing Wang, Yoshihiro Ishida
  • Patent number: 7403636
    Abstract: The present invention provides a method of processing an image, which includes the steps of identifying one candidate for human face region within the image, selecting a mouth neighborhood within the candidate for human face region, processing the mouth neighborhood, and classifying the candidate for human face region based on results of the processing step. According to the method of the present invention, human faces are detected just based on pixels included in the mouth neighborhood, but not all the pixels of the entire face.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: July 22, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Xin Ji, Libing Wang
  • Patent number: 7376270
    Abstract: The present invention provides a method and apparatus for detecting a red eye in an image. The method comprises steps of: calculating a skin color reference vector for said image; identifying a candidate for red eye region in said image; identifying skin color pixels in said candidate for red eye region; removing skin color pixels from said candidate for red eye region; deciding whether said candidate for red eye region is a red eye or not. The present invention also provides a method and apparatus for detecting a human face in an image. Moreover, the present invention provides corresponding storage medium including instructions for causing a processor to implement the methods. According to the present invention, red eyes and/or human faces can be detected with consideration of skin color pixels. The speed and accuracy of detecting red eyes and human faces are greatly increased.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: May 20, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Wang Jianmin, Yue Zhang
  • Patent number: 7103218
    Abstract: For a subset of pixels in an image in which it is desired to detect a human face if one is present, a first variable is derived from the gray-level distribution of the image, and a second variable is derived from a preset reference distribution that is characteristic of the object. The correspondence between the first variable and the second variable is then evaluated over the subset of pixels, and a determination is made as to whether the image contains the object, based on the result of this evaluation.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: September 5, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Xin Ji
  • Publication number: 20060018517
    Abstract: For a subset of pixels in an image in which it is desired to detect a human face if one is present, a first variable is derived from the gray-level distribution of the image, and a second variable is derived from a preset reference distribution that is characteristic of the object. The correspondence between the first variable and the second variable is then evaluated over the subset of pixels, and a determination is made as to whether the image contains the object, based on the result of this evaluation.
    Type: Application
    Filed: September 27, 2005
    Publication date: January 26, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Xinwu Chen, Xin Ji
  • Patent number: 6965684
    Abstract: Disclosed is a method, apparatus, and system for detecting a human face in an image. The method includes, for a subset of pixels in the image, deriving a first variable from the gray-level distribution of the image and deriving a second variable from a preset reference distribution that is characteristic of the object. The method further includes evaluating the correspondence between the first variable and the second variable over the subset of pixels and determining if the image contains the object based on the result of this evaluation.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: November 15, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Xin Ji
  • Publication number: 20050169520
    Abstract: The present invention provides a method and apparatus for detecting a red eye in an image. The method comprises steps of: calculating a skin color reference vector for said image; identifying a candidate for red eye region in said image; identifying skin color pixels in said candidate for red eye region; removing skin color pixels from said candidate for red eye region; deciding whether said candidate for red eye region is a red eye or not. The present invention also provides a method and apparatus for detecting a human face in an image. Moreover, the present invention provides corresponding storage medium including instructions for causing a processor to implement the methods. According to the present invention, red eyes and/or human faces can be detected with consideration of skin color pixels. The speed and accuracy of detecting red eyes and human faces are greatly increased.
    Type: Application
    Filed: December 29, 2004
    Publication date: August 4, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Xinwu Chen, Jianmin Wang, Yue Zhang
  • Publication number: 20040136592
    Abstract: The invention relates to a human eye detection method, apparatus, system and storage medium.
    Type: Application
    Filed: December 17, 2003
    Publication date: July 15, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Xin Ji, Libing Wang
  • Publication number: 20040131235
    Abstract: The present invention provides a method of processing an image, characterized by comprising steps of: identifying one candidate for human face region within said image; calculating a probability that said candidate for human face region represents a human face; and saving said probability as attached information to said image. The present invention also provides a method of processing an image, characterized by comprising steps of: identifying one candidate for human face region within said image; calculating a probability that said candidate for human face region represents a human face; judging whether or not said candidate for human face region represents a human face by comparing said probability with a threshold; and saving a result of said step of judging as attached information to said image. According to these methods, results of identifying candidates for human face regions will be saved to the image, and further processes to be conducted on the image will be facilitated.
    Type: Application
    Filed: November 20, 2003
    Publication date: July 8, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Xin Ji, Libing Wang, Yoshihiro Ishida
  • Publication number: 20040131236
    Abstract: The present invention provides a method of processing an image, characterized by comprising steps of: identifying one candidate for human face region within said image; selecting a mouth neighborhood within said candidate for human face region; processing said mouth neighborhood; and classifying said candidate for human face region based on results of said processing step. According to the method of the present invention, human faces are detected just based on pixels included in the mouth neighborhood, but not all the pixels of the entire face.
    Type: Application
    Filed: November 12, 2003
    Publication date: July 8, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Xinwu Chen, Xin Ji, Libing Wang
  • Publication number: 20020081032
    Abstract: Disclosed is a method, apparatus, and system for detecting a human face in an image. The method includes, for a subset of pixels in the image, deriving a first variable from the gray-level distribution of the image and deriving a second variable from a preset reference distribution that is characteristic of the object. The method further includes evaluating the correspondence between the first variable and the second variable over the subset of pixels and determining if the image contains the object based on the result of this evaluation.
    Type: Application
    Filed: September 14, 2001
    Publication date: June 27, 2002
    Inventors: Xinwu Chen, Xin Ji