Patents by Inventor Xiao Fan

Xiao Fan 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: 20020136451
    Abstract: The present application relates to document boundary determination.
    Type: Application
    Filed: March 22, 2001
    Publication date: September 26, 2002
    Inventors: John E. Dolan, John C. Dalrymple, James Zhixin Chang, Xiao-fan Feng
  • Patent number: 6429953
    Abstract: A method for super-resolution scanning in a image capturing device includes capturing a first color component of the image at one-half of a full resolution, capturing a first luminance component at one-half of the full resolution, and generating a first color-luminance output signal therefrom; capturing a second luminance component of the image at the full resolution and generating a luminance output signal therefrom; capturing a second color component of the image at one-half the full resolution, capturing a third luminance component of the image at one-half the full resolution, and generating a second color-luminance output signal therefrom; converting the first and second luminance components of the first and second color-luminance output signals and the third luminance component signal to a luminance component signal of 2X full resolution; and processing the full resolution output signals and the 2X full resolution output signal to form a combined output signal.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: August 6, 2002
    Assignee: Sharp Laboratories of America, Inc.
    Inventor: Xiao-fan Feng
  • Patent number: 6233360
    Abstract: A method and system implements a high addressability characteristic into an error diffusion process. A histogram of the image is generated and the actual background and black reference values are determined. A gray level value representing a pixel is received. The gray level value has a first resolution which corresponds to an original input resolution. The gray level value is interpolated to generate subpixel gray level values which correspond to a second resolution. The second resolution is higher than the first resolution and corresponds to the high addressability characteristic. A threshold circuit thresholds the interpolated gray level value and generates an error value as a result of the threshold using the determined background and black reference values. The error value has a resolution corresponding to the first resolution. A portion of the error value is diffused to adjacent pixels on a next scanline.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: May 15, 2001
    Assignee: Xerox Corporation
    Inventors: David J. Metcalfe, Roger L. Triplett, Xiao-fan Feng, John T. Newell
  • Patent number: 6201108
    Abstract: DNA encoding TGF-&bgr; TYPE III receptor of mammalian origin, DNA encoding TGF-&bgr; type II receptor of mammalian origin, TGF-&bgr; type III receptor, TGF-&bgr; type II receptor and uses therefor.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: March 13, 2001
    Assignee: Whitehead Institute for Medical Research
    Inventors: Herbert Y. Lin, Xiao-Fan Wang, Robert A. Weinberg, Harvey F. Lodish
  • Patent number: 6086867
    Abstract: DNA encoding TGF-.beta. TYPE III receptor of mammalian origin, DNA encoding TGF-.beta. type II receptor of mammalian origin, TGF-.beta. type III receptor. TGF-.beta. type II receptor and uses therefor.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: July 11, 2000
    Assignee: Whitehead Institute for Biomedical Research
    Inventors: Herbert Y. Lin, Xiao-Fan Wang, Robert A. Weinberg, Harvey F. Lodish
  • Patent number: 6046828
    Abstract: A method and system automatically determines the width (i.e., left and right edges) of a document when it is loaded for scanning or copying. When a document is staged, the scanner collects a predetermined number scanlines of the leadedge of the document. Both first order and second order statistics of the scanner and document are then calculated based on the scanned data. The auto-width detection process is adaptive to CCD sensor output variation, document variation, and scanner variation, thus making it robust against dust in the sensor path and random fluctuations of the scanner.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: April 4, 2000
    Assignee: Xerox Corporation
    Inventors: Xiao-fan Feng, John C. Handley
  • Patent number: 6046157
    Abstract: The mammalian TGF-.beta. type II receptor has been cloned. Recombinant TGF-.beta.-binding receptor polypeptides are useful to alter the binding of TGF-.beta. to its receptors and to modulate the effects of TGF-.beta. in vivo.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: April 4, 2000
    Assignee: Whitehead Institute for Biomedical Research
    Inventors: Herbert Y. Lin, Xiao-Fan Wang, Robert A. Weinberg, Harvey F. Lodish
  • Patent number: 6043900
    Abstract: A method and system automatically determines proper background values for a document. A histogram of the document is generated and it is determined whether a background characteristic of the document is uniform. If the background is uniform, a white background value is set equal to a first calculated white peak value. If the background is non-uniform, the white background value is set equal to a second calculated white peak value. A foreground value of the document is analyzed for validity when it is determined that a background characteristic of the document is uniform. A black background value is set equal to a black peak value calculated from the histogram when it is determined that a foreground value of the document is valid.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: March 28, 2000
    Assignee: Xerox Corporation
    Inventors: Xiao-fan Feng, Roger L. Triplett
  • Patent number: 6010872
    Abstract: The invention provides cDNAs encoding the human and rodent transforming growth factor-beta (TGF-.beta.) type III receptors. Nucleic acids encoding the mammalian receptors and soluble receptor polypeptides derived from them, expression systems for their production, and the polypeptides per se also provided.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: January 4, 2000
    Assignee: Whitehead Institute for Biomedical Research
    Inventors: Herbert Y. Lin, Xiao-Fan Wang, Robert A. Weinberg, Harvey F. Lodish
  • Patent number: 6008011
    Abstract: The mammalian TGF-.beta. type II receptor has been cloned. Nucleic acids encoding full-length and soluble receptor polypeptides, as well as fragments of such nucleic acids useful as probes, are provided. Corresponding vectors, transformed host cells, and their use to produce recombinant TGF-.beta. receptors are also described.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: December 28, 1999
    Assignee: Whitehead Institute for Biomedical Research
    Inventors: Herbert Y. Lin, Xiao-Fan Wang, Robert A. Weinberg, Harvey F. Lodish
  • Patent number: 6001969
    Abstract: The mammalian TGF-.beta. type II receptor has been cloned. Recombinant full-length and soluble receptor polypeptides, as well as TGF-.beta.-binding fragments of such polypeptides, are provided.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: December 14, 1999
    Assignee: Whitehead Institute for Biomedical Research
    Inventors: Herbert Y. Lin, Xiao-Fan Wang, Robert A. Weinberg, Harvey F. Lodish
  • Patent number: 5805724
    Abstract: A printing system for rendering marks on a recording medium receives a multi-level grey scale pixel value representing a pixel having a first resolution. A screening circuit generates a screened multi-level grey scale pixel value equal to (G.sub.L -V.sub.i)+(S.sub.i -Th)*Dmp.sub.vi *Mod.sub.Eff wherein G.sub.L is the maximum grey level value of the pixel, V.sub.i is equal to the multi-level grey scale pixel value of the first resolution, S.sub.i is equal to a screen value corresponding to a position of the pixel, the image classification of the pixel and a brightness/darkness setting, The threshold value, Dmp.sub.vi is a video dependent dampening factor, and Mod.sub.Eff is a modulation multiplication factor.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: September 8, 1998
    Assignee: Xerox Corporation
    Inventors: David J. Metcalfe, Roger L. Triplett, John T. Newell, Xiao-fan Feng
  • Patent number: 5538892
    Abstract: Isolated DNAs (e.g., cDNAs or genomic fragments) encoding TGF-.beta. type I receptors, or soluble, ligand-binding fragments thereof; vectors or cells which contain such DNAs; and substantially pure polypeptides encoded by such DNAs, whether produced by expression of the isolated DNAs, by isolation from natural sources, or by chemical synthesis.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: July 23, 1996
    Assignees: The General Hospital Corporation, Duke University
    Inventors: Patricia K. Donahoe, Michael Gustafson, Wei-Wu He, Xiao-Fan Wang