초록 ▼

A conventional tracker 14 is used to continually aim a sensor 12 at a flying object so that it is located in substantially the same spatial location in a plurality of image frames taken at different times. Thus, the object remains in about the same spatial position in each image frame while the back

A conventional tracker 14 is used to continually aim a sensor 12 at a flying object so that it is located in substantially the same spatial location in a plurality of image frames taken at different times. Thus, the object remains in about the same spatial position in each image frame while the background clutter generally changes. By processing two or more of the image frames it is possible to calculate a more precise aimpoint for the object than is generally provided by the track point.

대표청구항 ▼

A method of detecting the spatial location of a moving object, said method comprising: generating a track point for the object as it moves; using the track point to continually aim a sensor at the object so that it is located in substantially the same spatial location in a plurality of image frames

A method of detecting the spatial location of a moving object, said method comprising: generating a track point for the object as it moves; using the track point to continually aim a sensor at the object so that it is located in substantially the same spatial location in a plurality of image frames taken at different times whereby the object remains substantially in the same spatial position in each image frame while the background generally changes; subtracting at least two of the image frames to generate a difference image in which pixels associated with the object will have values substantially less than those associated with the background; applying a given threshold level to the difference image to generate a binarized signal; and using the binarized signal to calculate an aimpoint which is more closely associated with the centroid of the object than the track point.