Electronic boundary generation

Details Electronic boundary generation Electronic boundary generation

1991-02-05

1993-07-13

Hjerpe, Richard

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340712, 340728, 340747, G09G 508

Patent

active

052277704

ABSTRACT:
A method and apparatus for generating an electronic representation of a boundary, particularly for use in generating an outline around a displayed image. The apparatus comprises a screen (30) and a control system (1,2). The control system enables a cursor to be moved to spaced points along the boundary and determines the coordinates of the boundary by interpolating straight lines between adjacent points. The control system also permits at least part of the boundary to be defined in a continuous drawing mode in which the cursor is moved continuously along the boundary, the coordinates of the successive cursor positions being determined.

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"Lisa Draw"; Apple Computer, Inc.; copyright 1984; pp. 69-83 and 136-149.

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