Figure 2 | Scientific Reports

Figure 2

From: Hybrid optical-electronic convolutional neural networks with optimized diffractive optics for image classification

Figure 2

Learned optical correlator. (a) Schematic of an optical correlator, where the conv block consists of the 4f system shown in Fig. 1. (b) Characteristic optimized kernels of a multichannel unconstrained digital convolutional layer, a multichannel nonnegative digital convolutional layer, a single channel opt-conv layer with tiled kernels, and the PSF produced by phase mask optimization with the previous optimized tiled kernels as the target.

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