Figure 7a shows a radar image which represents an
oil-tanker at a distance of 3000 m from the antenna site;
the corresponding detected contour (obtained after the
morphological processing steps that merge the two
blobs derived by thresholding) is represented in the
form of a centroidal map in Figure 7b. Ship-prows are
accurately extracted from this map p(B) as previously
described.
An alternative approach for the detection of ship
orientations has been proposed”. It is based on the
application of the Hough Transform (HT) to the ship
skeletons. The skeleton preserves the natural structure
of a shape and makes its features easier to extract
automatically. The application of the HT to the
skeleton of a ship’s image, whose shape is elongated