Appeal No. 2001-0177
Application 08/731,122
BACKGROUND
The invention relates to a method and system for detecting
the precise location of a reflective object in a video field
wherein the determined location is subsequently utilized to
generate a graphic to be added to a background video scene
utilizing conventional compositing techniques.
Claim 5 is reproduced below.
5. A method for creating a composite video signal
having a background portion and a foreground portion, said
foreground portion representing a foreground scene
containing a moving reflective object having a predetermined
color and size, said foreground portion defined by a field
of video information provided by a video source having red,
blue and green components, said red, blue and green
components having been converted to a digital
representation, said method comprising the steps of:
a) comparing the component of a said video signal
corresponding to the color of said reflective object to a
predefined color generating a first signal representing the
results of said comparison;
b) computing the size and shape of an object within a
video field, by scanning in left, right, top, and bottom
directions for pixels having a predefined color;
c) comparing the size and shape of said pixels having
said predefined color within said video field to a
predefined size and shape and generating a second signal
representing the results of the comparison;
d) specifying the relative positions of said
reflective object within said video field when first and
second signals indicate that the pixels match the predefined
color, size and shape; and
e) supplying the specified relative position to a
graphics computer which generates an image signal to be
added to said background portion in real time for displaying
a graphical image at the specified relative position on a
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