Open set HRRP recognition based on convolutional neural network

Abstract

Most existing algorithms in high‐resolution range profile recognition focus on the closed set cases, where the test sample is from a known class. However, a sample could be drawn from unknown classes in realistic scenario, which is named as open set recognition. Here, open set HRRP recognition is achieved by incorporating extreme value theory into convolutional neural network. The softmax layer is replaced by a so‐called openmax layer which estimates probabilities of the test sample belonging to known and unknown classes. Experimental results demonstrate that the proposed method outperforms the state‐of‐art algorithms such as NN, 1‐vs‐set machine, and W‐SVM in terms of correct rejection rate.