Appeal No. 2001-1815
Application 08/924,865
the view of the camera. Also within the view of the camera at
angle of view B is the edge 191 of the overhead structure 190.
See page 6 of Appellant’s specification.
Conventionally, camera positioning systems contain one or
more “stops” as to the extent of rotation of the camera, to
prevent the camera’s field of view from extending significantly
into areas having no useful security information. If such a stop
were employed, the field of view at angle of view B could be
considered optimal with regard to the amount of useful security
information at this angle of view, because only a minimal portion
of the overhead structure 190 is present in the field of view.
See page 8 of Appellant’s specification. As the angle of view
changes, the stops which limit the rotation of the camera are set
to effect the appropriate lines of sight. For example, in figure
1, the stops will be set to lines of sight L and L’, respectively
when the camera is set to angles of views B and C. See page 9 of
Appellant’s specification.
Figure 4 shows a flowchart for dynamically adjusting a
camera positioning stop limit based upon a geometric model. The
determination of the stop corresponding to a particular angle of
view can be accomplished algorithmically or empirically. The
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