Patents by Inventor Donald J. Imsand

Donald J. Imsand 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).

  • Patent number: 4723159
    Abstract: Methods and apparatus for producing improved three dimensional television and video images which may be displayed on conventional display apparatus utilizing dynamic disparity techniques together with global convergence processing to remove objectional centroid disparity motion. Layered video and digital computer processing techniques are disclosed. In a preferred embodiment, a first camera scanning a foreground object rotates about a second fixed camera directed at background scenery. The obtained video data is computer processed using the above techniques, resulting in improved three-dimensional display.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: February 2, 1988
    Inventor: Donald J. Imsand
  • Patent number: 4647965
    Abstract: A method and apparatus for improving the quality and viewing comfort of three dimensional movies and other video systems that utilize two stereoscopically related pictures by shifting corresponding object images in one or both of the pictures to positions that more nearly coincide when stereoscopically viewed such that all corresponding stereo object images in the pictures are within a viewer's limit of binocular fusion.
    Type: Grant
    Filed: May 24, 1984
    Date of Patent: March 3, 1987
    Inventor: Donald J. Imsand
  • Patent number: 4567513
    Abstract: Methods and apparatus for producing a television image having the illusion of three dimensional depth. This method is compatible with television broadcast standards and standard home TV receivers without additional home apparatus. The basic methodology is to alternate video from two stereoscopic TV cameras, using a synchronized video switch, at an alternation rate to allow the human visual perception process to perceive the two images as a single binocularly fused image. However, this basic method has an inherent flicker problem related to the "limit of binocular fusion" of the human visual perception process. The flicker problem is eliminated through video processing techniques that produce globally converged alternating binocular video. The method is also compatible with display mediums other than television.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: January 28, 1986
    Inventor: Donald J. Imsand
  • Patent number: 4006291
    Abstract: Method and apparatus for producing a three dimensional television image by presenting stereoptican pairs of images to the viewers eyes. One of the stereoptican partners is presented most of the time while the second stereoptican partner is flashed on and off rapidly. Under the proper conditions with the second stereoptican partner being flashed on for a suitably short period of time at the proper repetition rate, the viewer is not consciously aware of its presence and effectively perceives the picture as a three dimensional image.
    Type: Grant
    Filed: February 22, 1974
    Date of Patent: February 1, 1977
    Inventor: Donald J. Imsand