Patents Assigned to Image Transform
  • Patent number: 4823204
    Abstract: A method and apparatus for correction of both horizontal and vertical film weave is disclosed in connection with continuous motion type moving beam recorder or playback devices such as electron beam or laser beam recorders or flying spot scanner or line scan telecines. Weave correction is accomplished by scanning the sprocket hole of the film and generating a correction signal to compensate for the film weave. The film weave is corrected by electronic weave correction as opposed to mechanical pin registration means. The sprocket hole is scanned in the vertical direction to locate the upper and lower edges of the sprocket hole, and then to position the beam in the vertical center of the hole and for determination of vertical weave of the film. The sprocket hole is then scanned in the hozizontal direction, for determination of the horizontal weave of the film.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: April 18, 1989
    Assignee: Image Transform
    Inventor: David E. Holland