手法を比較

	シャムニューラルネットワーク	オートエンコーダー
分野	深層学習	深層学習
系統	Machine learning	Machine learning
提唱年	1993	2006
提唱者	Jane Bromley & Yann LeCun et al.; popularized by Koch et al.	Hinton, G.E. & Salakhutdinov, R.R.
種類	Deep metric-learning architecture	Neural network (encoder-decoder)
原典	Bromley, J., Guyon, I., LeCun, Y., Säckinger, E., & Shah, R. (1993). Signature verification using a 'Siamese' time delay neural network. Advances in Neural Information Processing Systems, 6.	Hinton, G.E. & Salakhutdinov, R.R. (2006). Reducing the Dimensionality of Data with Neural Networks. Science, 313(5786), 504–507.
別名	twin network, Siamese neural network, contrastive metric network, Siyam ağı	Otokodlayıcı (Autoencoder), otokodlayıcı, auto-encoder, encoder-decoder network
関連	1	4
概要	A Siamese network is a deep architecture with two (or more) identical, weight-sharing branches that map inputs into an embedding space where similar inputs land close together and dissimilar ones far apart. Introduced by Bromley, LeCun, and colleagues in 1993 for signature verification and revived by Koch et al. (2015) for one-shot image recognition, it learns a similarity metric rather than fixed class labels, making it ideal for verification, matching, and few-shot tasks.	An autoencoder is an encoder-decoder neural network, popularised by Hinton and Salakhutdinov in 2006, that compresses data into a low-dimensional latent code and then reconstructs it, enabling dimensionality reduction and anomaly detection. By learning to rebuild its own input through a narrow bottleneck, it discovers a compact representation of the data.