Jämför metoder
Granska de valda metoderna sida vid sida; rader som skiljer sig är markerade.
| Semi-supervised Isolation Forest× | One-class SVM× | |
|---|---|---|
| Ämnesområde | Maskininlärning | Maskininlärning |
| Familj | Machine learning | Machine learning |
| Ursprungsår≠ | 2013–2020 | 1999–2001 |
| Upphovsperson≠ | Extended from Liu, F.T., Ting, K.M., and Zhou, Z-H. (iForest, 2008); semi-supervised variants developed by multiple authors ca. 2013–2020 | Scholkopf, B., Platt, J. C., Smola, A. J., Williamson, R. C. |
| Typ≠ | Ensemble anomaly detection (semi-supervised extension) | Anomaly / novelty detection (unsupervised) |
| Ursprungskälla≠ | Görnitz, N., Kloft, M., Rieck, K., & Brefeld, U. (2013). Toward supervised anomaly detection. Journal of Artificial Intelligence Research, 46, 235–262. link ↗ | Scholkopf, B., Platt, J. C., Shawe-Taylor, J., Smola, A. J., & Williamson, R. C. (2001). Estimating the support of a high-dimensional distribution. Neural Computation, 13(7), 1443–1471. DOI ↗ |
| Alias | SSIF, semi-supervised iForest, label-guided Isolation Forest, partially supervised Isolation Forest | OCSVM, one-class support vector machine, novelty SVM, unsupervised SVM |
| Närliggande≠ | 6 | 3 |
| Sammanfattning≠ | Semi-supervised Isolation Forest extends the classic Isolation Forest anomaly detector by incorporating a small set of labeled anomaly (and possibly normal) examples alongside a large unlabeled dataset. This label guidance adjusts the model's anomaly scores so that known anomalies are separated more reliably, bridging the gap between fully unsupervised and fully supervised detection. | One-class SVM is an unsupervised anomaly and novelty detection algorithm that learns a tight boundary around normal training data in a kernel-induced feature space, flagging new observations that fall outside that boundary as outliers. Introduced by Scholkopf et al. in 1999–2001, it extends the SVM framework to the single-class setting where no labelled anomalies are available. |
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