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Code Issues Actions 2 Packages Projects Releases Wiki Activity

LPR improvements (#17289)

Browse Source 
* config options

* processing in maintainer

* detect and process dedicated lpr plates

* create camera type, add manual event and save snapshot

* use const

* ensure lpr events are always detections, typing fixes

* docs

* docs tweaks

* add preprocessing and penalization for low confidence chars
This commit is contained in:
Josh Hawkins
2025-03-23 13:30:48 -06:00
committed by GitHub
parent b7fcd41737
commit fa4643fddf
14 changed files with 706 additions and 194 deletions
Download Patch File Download Diff File Expand all files Collapse all files
frigate/review/maintainer.py
+48 -4
View File
@@ -513,7 +513,7 @@ class ReviewSegmentMaintainer(threading.Thread):
_,
audio_detections,
) = data
elif topic == DetectionTypeEnum.api:
elif topic == DetectionTypeEnum.api or DetectionTypeEnum.lpr:
(
camera,
frame_time,
@@ -572,13 +572,21 @@ class ReviewSegmentMaintainer(threading.Thread):
or audio in camera_config.review.detections.labels
) and camera_config.review.detections.enabled:
current_segment.audio.add(audio)
elif topic == DetectionTypeEnum.api:
elif topic == DetectionTypeEnum.api or topic == DetectionTypeEnum.lpr:
if manual_info["state"] == ManualEventState.complete:
current_segment.detections[manual_info["event_id"]] = (
manual_info["label"]
)
if self.config.cameras[camera].review.alerts.enabled:
if (
topic == DetectionTypeEnum.api
and self.config.cameras[camera].review.alerts.enabled
):
current_segment.severity = SeverityEnum.alert
elif (
topic == DetectionTypeEnum.lpr
and self.config.cameras[camera].review.detections.enabled
):
current_segment.severity = SeverityEnum.detection
current_segment.last_update = manual_info["end_time"]
elif manual_info["state"] == ManualEventState.start:
self.indefinite_events[camera][manual_info["event_id"]] = (
@@ -587,8 +595,16 @@ class ReviewSegmentMaintainer(threading.Thread):
current_segment.detections[manual_info["event_id"]] = (
manual_info["label"]
)
if self.config.cameras[camera].review.alerts.enabled:
if (
topic == DetectionTypeEnum.api
and self.config.cameras[camera].review.alerts.enabled
):
current_segment.severity = SeverityEnum.alert
elif (
topic == DetectionTypeEnum.lpr
and self.config.cameras[camera].review.detections.enabled
):
current_segment.severity = SeverityEnum.detection
# temporarily make it so this event can not end
current_segment.last_update = sys.maxsize
@@ -676,6 +692,34 @@ class ReviewSegmentMaintainer(threading.Thread):
logger.warning(
f"Manual event API has been called for {camera}, but alerts are disabled. This manual event will not appear as an alert."
)
elif topic == DetectionTypeEnum.lpr:
if self.config.cameras[camera].review.detections.enabled:
self.active_review_segments[camera] = PendingReviewSegment(
camera,
frame_time,
SeverityEnum.detection,
{manual_info["event_id"]: manual_info["label"]},
{},
[],
set(),
)
if manual_info["state"] == ManualEventState.start:
self.indefinite_events[camera][manual_info["event_id"]] = (
manual_info["label"]
)
# temporarily make it so this event can not end
self.active_review_segments[
camera
].last_update = sys.maxsize
elif manual_info["state"] == ManualEventState.complete:
self.active_review_segments[
camera
].last_update = manual_info["end_time"]
else:
logger.warning(
f"Dedicated LPR camera API has been called for {camera}, but detections are disabled. LPR events will not appear as a detection."
)
self.record_config_subscriber.stop()
self.review_config_subscriber.stop()