Patents by Inventor Henry H. J. Liao

Henry H. J. Liao 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).

  • Statistical resolution conversion technique
    Patent number: 4068266
    Abstract: A resolution converter for interfacing raster input and output scanners having different, predetermined resolution characteristics relies on a maximum likelihood interpolation process, whereby the conversion is carried out with minimum statistical error.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: January 10, 1978
    Assignee: Xerox Corporation
    Inventor: Henry H. J. Liao
  • Gray scale interpolation technique
    Patent number: 4032977
    Abstract: Expanded gray scale information is recovered from quantized video input data in a raster scanned imaging system by utilizing an interpolation process to predict a gray scale value for each element of output data from the quantized levels of a m .times. n matrix of input data elements. The prediction matrix for each output data element includes the spatially corresponding input data element, together with vertically and horizontally input data elements.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: June 28, 1977
    Assignee: Xerox Corporation
    Inventor: Henry H. J. Liao