Fig. 5: Metric learning for the authentication of noise-affected digitized images.
From: High-dimensional anticounterfeiting nanodiamonds authenticated with deep metric learning
a Schematic diagram showing the design and insight of our metric learning framework. CNN: convolutional neural network. b Schematic diagram showing the training process of CNN in one loop. c, d Authentication results for the 150 pairs of digitized images used in Fig. 4b, c. Heat map (c) showing the pairwise match; the color bar reflects the similarity score. Histogram (d) displaying the statistics of similarity scores among digitized readout results for the different FND PUF labels (red bars) and the same FND PUF labels (blue bars).
