Patents by Inventor Ping Hua

Ping Hua 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).

  • Method and apparatus for automatically determining a quantization factor value that produces a desired average compression ratio of an image sequence using JPEG compression
    Patent number: 6285793
    Abstract: A sequence of angiographic images is made up of frames of data. A sample sequence, made up of a number of such frames, is compressed using a lower value of the quantization factor and the resulting average compression ratio is determined. The same sample sequence is also compressed using a higher value for the quantization factor and another average compression ratio is determined. The value of the quantization factor corresponding to a desired average compression ratio of the entire sequence can then be determined by linear interpolation.
    Type: Grant
    Filed: November 6, 1995
    Date of Patent: September 4, 2001
    Assignee: Siemens Medical Systems, Inc.
    Inventor: Ping Hua
  • Methods and apparatus for controlling X-ray angiographic image acquisition
    Patent number: 6195450
    Abstract: Controlling the stepping of an x-ray angiography imaging device (and/or table), and/or providing a visualization aid for stepping an x-ray angiography imaging device (and/or table), to maximize the diagnostic usefulness of images acquired by the x-ray angiography imaging device. The stepping and visualization aid use features, extracted from captured images, of the state of contrast media injected into a patient.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: February 27, 2001
    Assignee: Siemens Corporate Research, Inc.
    Inventors: Jianzhong Qian, Ping Hua, Zhenyu Wu
  • Method and apparatus for controlling x-ray angiographic image acquistion
    Patent number: 6052476
    Abstract: Controlling the stepping of an x-ray angiography imaging device (and/or table), and/or providing a visualization aid for stepping an x-ray angiography imaging device (and/or table), to maximize the diagnostic usefulness of images acquired by the x-ray angiography imaging device. The stepping and visualization aid use features, extracted from captured images, of the state of contrast media injected into a patient.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: April 18, 2000
    Assignee: Siemens Corporate Research, Inc.
    Inventors: Jianzhong Qian, Ping Hua, Zhenyu Wu