DCN_AlexNet   This model implements a pre-trained deep convolutional neural network (CNN) known as AlexNet for image classification (Krizhevsky et al., 2010). It is designed to approximate the version of AlexNet available from the Berkeley Artificial Intelligence Research Lab (Caffe website). Some units within this CNN have been found to be similar to V4 neurons in terms of their tuning for contour curvature and translation invariance for a set of simple closed shapes (Pospisil et al.).