Maritime targets classification based on CNN using Gaofen-3 SAR images

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Abstract
The classification and detection of maritime targets are widely used in shipping navigation and military fields. With thedevelopment of spaceborne synthetic aperture radar (SAR) technology, more and more very high-resolution SAR images can beacquired for maritime targets recognition. However, due to the different imaging mechanisms between SAR images and opticalimages, it is difficult and laborious to interpret SAR images manually. This study uses a modified Alexnet structure to realisemaritime targets classification on the Gaofen-3 spaceborne SAR images. The maritime targets dataset (MTD), including boats,cargo ships, container ships, windmills, oil tankers, and iron towers, is conducted. Moreover, the proposed convolution neuralnetworks (CNNs) structure is trained and tested on the MTD. Experimental results show that the model can get an accuracy of92.10% in classifying the six kinds of targets, and the performance is superior compared with other CNNs and traditionalsupportive vector machine algorithms.