Abstract
There are many researches on recognizing and classifying a cylindrical object using side scan sonar images. In this paper we segment object, shadow of object and background of the images in order to extract the cylindrical object from the segmented object information and figure out whether it corresponds to the cylindrical object what we want to find. Shadow of cylindrical object estimated from 3-dimensional segmented space is compared with the shape of shadow got from morphological method. Many objects of different shape such as cylindrical, cylindrical object-likes and non- cylindrical objects are used as a background objects to simulate the objects are mixed with similar objects. Result shows that more than 90 % of the objects were recognized as objects in a comparably short time of order of 1 second.
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