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A new feature named ‘2D comb’ to improve ship classification is proposed. The proposed feature presents added value to distinguish between container ship, tank ship and cargo ship. It is based on radar cross‐section (RCS) statistic of the ship target related to the ship structure. Besides, related local RCS is proposed to classify three kinds of ships. Experimental results based on TerraSAR‐X images show that the proposed feature can abstract and describe the ship structure in high‐resolution synthetic aperture radar (SAR) imagery. It establishes relationship between RCS and ship structure, which is very useful to distinguish different kinds of ships.
Leng et al. (2017) studied this question.