Patents by Inventor John Alfred Crawley

John Alfred Crawley 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: 3980814
    Abstract: An improvement in methods of image analysis is described whereby the time required for analyzing certain types of images can be substantially reduced. The invention utilizes the light integration characteristic of a television camera to combine a succession of images applied thereto into a single composite image. A video signal of the composite image is then obtained by scanning in the usual way. Analysis of the video signal is performed in a known manner after threshold detection.The invention is of application to the analysis of microscopic specimens which are generally black or dark grey and which include a few widely spaced white or light grey features, on which the analysis is to be performed.One embodiment utilizes a single scanner and switching devices for alternately producing scanning and not scanning.
    Type: Grant
    Filed: November 21, 1973
    Date of Patent: September 14, 1976
    Assignee: Image Analysing Computers Limited
    Inventor: John Alfred Crawley