Patents by Inventor Heinz Bauschke

Heinz Bauschke 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).

  • System and method for recompressing a digital image using requantization
    Patent number: 7035474
    Abstract: A system and method for recompressing a JPEG image using requantization is described. DCT transform coefficients for a compressed JPEG image are statistically analyzed to generate a stored numeric error representation. Local minimizers are determined from the stored numeric error representation with selective rounding. A new quantization matrix Q1 is selected from the local minimizers bounded by a target quantization matrix Qbound. The compressed JPEG image is recompressed using the new quantization matrix Q1.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: April 25, 2006
    Assignee: Packeteer, Inc.
    Inventors: Heinz Bauschke, Mason Macklem, Nicholas Swart
  • System and method for recompressing a digital image using requantization
    Publication number: 20050111747
    Abstract: A system and method for recompressing a JPEG image using requantization is described. DCT transform coefficients for a compressed JPEG image are statistically analyzed to generate a stored numeric error representation. Local minimizers are determined from the stored numeric error representation with selective rounding. A new quantization matrix Q1 is selected from the local minimizers bounded by a target quantization matrix Qbound. The compressed JPEG image is recompressed using the new quantization matrix Q1.
    Type: Application
    Filed: December 20, 2004
    Publication date: May 26, 2005
    Inventors: Heinz Bauschke, Mason Macklem, Nicholas Swart
  • System and method for recompressing a jpeg image using requantization
    Patent number: 6850650
    Abstract: A system and method for recompressing a JPEG image using requantization is described. DCT transform coefficients for a compressed JPEG image are statistically analyzed to generate a stored numeric error representation. Local minimizers are determined from the stored numeric error representation with selective rounding. A new quantization matrix Q1 is selected from the local minimizers bounded by a target quantization matrix Qbound. The compressed JPEG image is recompressed using the new quantization matrix Q1.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: February 1, 2005
    Assignee: Packeteer, Inc.
    Inventors: Heinz Bauschke, Mason Macklem, Nicholas Swart