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Reconstruction loss

As explained in Delivering Machine Learning Projects: From design to deployment

A reconstruction error is the discrepancy between an input and the output reconstructed from its encoded representation.

Reconstruction loss measures the discrepancy between an input and the output reconstructed from its encoded representation. In anomaly detection, unusually large reconstruction errors can flag inputs that differ from patterns learned from historical data. section 8.5

News-article anomaly detection

An autoencoder learns from historical news articles for a region. The system compares each article with its reconstruction and uses the resulting reconstruction error as an anomaly-detection feature. section 8.5

How Delivering Machine Learning Projects: From design to deployment covers it

How deep it goes
Defines reconstruction error as input-output discrepancy and applies it operationally, without detailing the loss formula or autoencoder internals.
Examples
Measures reconstruction errors for individual news articles against an autoencoder trained on regional historical articles.
What it assumes
Assumes an autoencoder trained on historical articles and an anomaly-detection workflow.
What you can do after
Diagnose anomalous articles by comparing their reconstructions with their inputs.
How it connects
Connects autoencoders with anomaly detection and historical data.

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This explainer was generated by Manning's knowledge graph from the text of Delivering Machine Learning Projects: From design to deployment. The section links point to the parts of the book it draws on.