Appeal No. 1997-2896
Application 08/340,561
color of the pixels used to draw the lines. Alternatively,
Appellants describe on pages 15 and 16 of the specification,
that a technique is used to adjust the brightness of the
pixels used to draw the line. This adjustment is made in
proportion to the amount of the pixel covered by the line.
The end result is that the pixels partly within the drawn line
will be blended with the background.
Independent claim 2 is representative of the invention.
2. A method for producing an anti-aliased image on the
display of a pen computer, comprising:
(a) moving a stylus along a desired path on the surface
of a digitizing tablet, the digitizing tablet having a
plurality of locations corresponding to pixel locations on an
attached display;
(b) producing in response to step (a) an electrical
signal indicative of the location of the stylus at a given
time;
(c) generating on the display an anti-aliased visual
display of the path, the visual display comprising a plurality
of pixels, comprising the steps:
displaying as line segments each group of
proximately disposed pixels corresponding to locations
traversed by the stylus, a plurality of the line segments
constituting a representation of the path of the stylus;
displaying each of the line segments on the display
such that the ends of adjacent line segments overlap.
3
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