Appeal No. 95-1220
Application 07/972,279
Appellants disclose on pages 4 through 6 of the specification
an angular correlation algorithm that simply calculates the
area of overlap versus the angle between the overlapped im-
ages. The resulting set of correlation values can be used to
recover the boundary of an object. On pages 7 and 8 of the
specification, Appellants disclose the Hough transform algo-
rithm. On pages 9 and 10 of the specification and illustrated
in Figure 6, Appellants disclose a multi-aperture optical
system which optically rotates an image, calculates its Hough
transform and recovers its boundary using angular correlation.
The replicated images are passed through a fixed mask onto a
multiple detector array. The mask consists of a series of
rotated half-plane slits as shown in Figure 6, inset (b).
Independent claim 1 is reproduced as follows:
1. A method for extracting the boundary of an
object in a sensor input image comprising the steps of:
overlapping a slit and the object in the sensor
input image;
rotating the slit relative to the object, the slit
thereby sampling the entire boundary of the object; and
calculating for each rotation position an area of
overlap of the slit and the object versus an angle between the
slit and the object.
3
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