Patents by Inventor Eiji Atsumi

Eiji Atsumi 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).

  • Lossy/lossless region-of-interest image coding
    Patent number: 6891973
    Abstract: A method and apparatus for encoding digital image data wherein region of interest can be specified either before the encoding process has begun or during the encoding process (127), such that the priority of the encoder outputs are modified so as to place more emphasis on the region of interest, therefore increasing the speed and/or increasing the fidelity of the reconstructed region of interest. The system, therefore, enables more effective reconstruction of digital images over communication lines (128).
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: May 10, 2005
    Assignees: Mitsubishi Electronic Corporation, University of Maryland
    Inventors: Eiji Atsumi, Nariman Farvardin
  • Method and apparatus for compressing and decompressing images
    Publication number: 20050025371
    Abstract: A method and apparatus for encoding (622) digital image data wherein a region of interest (606) can be specified either before the encoding process has begun or during the encoding process, such that the priority (616) of the encoder outputs are modified so as to place more emphasis on the region of interest, therefore increasing the speed and/or increasing the fidelity of the reconstructed region of interest. The system, therefore, enables more effective reconstruction of digital images over communication lines.
    Type: Application
    Filed: August 27, 2004
    Publication date: February 3, 2005
    Inventors: Eiji Atsumi, Nariman Farvardin
  • Method and apparatus for compressing and decompressing images
    Patent number: 6801665
    Abstract: A method and apparatus for encoding (622) digital image data wherein a region of interest (606) can be specified either before the encoding process has begun or during the encoding process, such that the priority (616) of the encoder outputs are modified so as to place more emphasis on the region of interest, therefore increasing the speed and/or increasing the fidelity of the reconstructed region of interest. The system, therefore, enables more effective reconstruction of digital images over communication lines.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: October 5, 2004
    Assignees: University of Maryland, Mitsubishi Electric Corporation
    Inventors: Eiji Atsumi, Nariman Farvardin
  • Image compressing/expanding method and image compression expanding device
    Patent number: 6356666
    Abstract: On the image compression side, each lossless wavelet transformation coefficient on which a lossless wavelet transformation for an image is effected, is first subjected to quantization and entropy coding in a coarse step size. Thereafter, quantization error signals are successively subjected to quantization and entropy coding in a fine step size to thereby generate a progressive coded bit stream. On the image expansion side, lossless wavelet transformation coefficients obtained by entropy decoding and inverse quantization are subjected to inverse lossless wavelet transformations every coded bit streams bearing respective stages for image progressive reconstruction display. Data obtained by the inverse transformations is added to the already-reconstructed image data together with updated auxiliary information about each image to thereby reconstruct and display the image progressively.
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: March 12, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Eiji Atsumi, Masayuki Yoshida