Patents by Inventor Lars E. Wall

Lars E. Wall 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: 4551752
    Abstract: A method and a device for correcting distortion in an image recorded electronically and built up of picture elements along lines. The distortion arises due to the fact that in a field of view scanned along curved lines (31, 33, 35), the picture elements situated vertically below each other when represented on parallel straight lines are displaced horizontally relatively to each other. The picture elements obtained by scanning the field of view are stored in a memory (10) and fed out to a video screen (20). The picture elements on the representation line associated with the shortest scanning line are fed out unchanged while on lines corresponding to longer scanning lines additional picture elements are inserted at definite distance from each other. The distance is selected in such a manner that the number of inserted picture elements per line is proportional to the difference between the length of the respective line and the length of the shortest line (FIG. 5).
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: November 5, 1985
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Lars E. Wall, John E. Jonsson