Media Server 26.1
Media Server Help

# Recognizer Types

Object Class Recognition supports several types of recognizer. All use neural networks but have different characteristics.

OpenText recommends that you train object class recognition on a machine with a supported GPU. You can use a trained recognizer with or without a GPU but OpenText recommends using a GPU for best performance.

- `Generation4` recognizers offer the best accuracy, especially for recognizers that you train yourself. The `Generation4` recognizer type was introduced in Media Server 12.9.
- `Generation3` recognizers are the fastest at run-time, but accuracy is slightly lower than a `Generation2` or `Generation4` recognizer.
- `Generation2` recognizers were introduced in Media Server 12.4 and OpenText now recommends using `Generation4` recognizers instead.

Copyright 2025 Open Text
Version 26.1 | Last updated January 2026

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Product: Knowledge Discovery Media Server 26.1

Topic Title: Recognizer Types