Fig. 6From: Radar signal recognition based on triplet convolutional neural networkVisualization of feature maps in different CNN layers. a The input TFIs with the size of \(100\times 100\). b, c The output features of Conv Block 1 and Conv Block 2. The size of feature maps in b is \(50\times 50\) and \(25\times 25\) in cBack to article page