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Graphic display area classification

  • US 4,368,463 A
  • Filed: 03/19/1980
  • Issued: 01/11/1983
  • Est. Priority Date: 03/21/1979
  • Status: Expired due to Term
First Claim
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1. A raster-scan display apparatus comprising:

  • first store means having a plurality of memory locations for storing data representing respective dot positions of a display field;

    means operable to store in said store data representing boundary dot positions;

    second store means having a plurality of memory locations for storing data representing respective dot positions of the display field;

    means operable to define one or more notional dot positions in or adjacent the field as representing a seed point or points; and

    classifying means arranged in operation, for each dot position of the display field, to determine whether there exists, from that dot position to the or a seed point, a connected path of dot positions which does not include a dot position which is indicated by the corresponding location in said first store means as being a boundary dot position and, if such a path exists, to set the corresponding location in the second store means.

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