- A siamese network is a special type of neural network, and it is one of the simplest and most commonly used one-shot learning algorithms. Siamese networks basically consist of two symmetrical neural networks that share the same weights and architecture and are joined together at the end using an energy function, E.
- The contrastive loss function can be expressed as follows:
In the preceding equation, the value of Y is the true label, which will be 1 when the two input values are similar and 0 if the two input values are dissimilar, and E is our energy function, which can be any distance measure. The term margin is used to hold the constraint; that is, when two input values are dissimilar and if their distance is greater than...
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