Fig. 7: Optoelectronic synapses for convolutional neural network.

a Convolutional neural network (CNN), composed of convolutional, pooling, and fully connected layers, about the CIFAR-10 dataset, pre-processed for RGB color discrimination. b, c Image recognition rate of the CIFAR-10 dataset: b bidirectional and c unidirectional weight update. d Memristor crossbar arrays for the fully connected layers of the CNN.