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lpr docs tweaks

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This commit is contained in:
Josh Hawkins 2025-12-10 09:28:52 -06:00
parent c79f1a9038
commit 1114c9c903
1 changed files with 14 additions and 4 deletions
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18
docs/docs/configuration/license_plate_recognition.md
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@ -374,9 +374,19 @@ Use `match_distance` to allow small character mismatches. Alternatively, define
Start with ["Why isn't my license plate being detected and recognized?"](#why-isnt-my-license-plate-being-detected-and-recognized). If you are still having issues, work through these steps.
1. Enable debug logs to see exactly what Frigate is doing.
1. Start with a simplified LPR config.
- Enable debug logs for LPR by adding `frigate.data_processing.common.license_plate: debug` to your `logger` configuration. These logs are _very_ verbose, so only keep this enabled when necessary.
- Remove or comment out everything in your LPR config, including `min_area`, `min_plate_length`, `format`, `known_plates`, or `enhancement` values so that the only values left are `enabled` and `debug_save_plates`. This will run LPR with Frigate's default values.
```yaml
lpr:
enabled: true
debug_save_plates: true
```
2. Enable debug logs to see exactly what Frigate is doing.
- Enable debug logs for LPR by adding `frigate.data_processing.common.license_plate: debug` to your `logger` configuration. These logs are _very_ verbose, so only keep this enabled when necessary. Restart Frigate after this change.
```yaml
logger:
@ -385,7 +395,7 @@ Start with ["Why isn't my license plate being detected and recognized?"](#why-is
frigate.data_processing.common.license_plate: debug
```
2. Ensure your plates are being _detected_.
3. Ensure your plates are being _detected_.
If you are using a Frigate+ or `license_plate` detecting model:
@ -398,7 +408,7 @@ Start with ["Why isn't my license plate being detected and recognized?"](#why-is
- Watch the debug logs for messages from the YOLOv9 plate detector.
- You may need to adjust your `detection_threshold` if your plates are not being detected.
3. Ensure the characters on detected plates are being _recognized_.
4. Ensure the characters on detected plates are being _recognized_.
- Enable `debug_save_plates` to save images of detected text on plates to the clips directory (`/media/frigate/clips/lpr`). Ensure these images are readable and the text is clear.
- Watch the debug view to see plates recognized in real-time. For non-dedicated LPR cameras, the `car` or `motorcycle` label will change to the recognized plate when LPR is enabled and working.