The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 1993
Filed:
Feb. 05, 1991
Applicant:
Inventor:
Stephen Freeman, Bedfordshire, GB;
Assignee:
Crosfield Electronics Ltd., , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340709 ; 340712 ; 340728 ; 340747 ;
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.