Nonlinear All-Optical Diffractive Deep Neural Network with 10.6 μm Wavelength for Image Classification

Table 11

Classification accuracy rates of N-D²NN with different activation functions.

Activation functions	Accuracy (%)
	MNIST	Fashion-MNIST
Leaky-ReLU	97.76	89.24
PReLU	97.68	89.28
RReLU	97.86	89.28