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only run detection on objects that intersect with motion

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Blake Blackshear 2021-02-03 05:58:33 -06:00
parent 4f5d4e36b7
commit 1cbe6f77ee
1 changed files with 9 additions and 1 deletions
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10
frigate/video.py
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@ -281,6 +281,13 @@ def reduce_boxes(boxes):
reduced_boxes = cv2.groupRectangles([list(b) for b in itertools.chain(boxes, boxes)], 1, 0.2)[0]
return [tuple(b) for b in reduced_boxes]
# modified from https://stackoverflow.com/a/40795835
def intersects_any(box_a, boxes):
for box in boxes:
if box_a[2] < box[0] or box_a[0] > box[2] or box_a[1] < box[3] or box_a[3] > box[1]:
continue
return True
def detect(object_detector, frame, model_shape, region, objects_to_track, object_filters):
tensor_input = create_tensor_input(frame, model_shape, region)
@ -350,7 +357,8 @@ def process_frames(camera_name: str, frame_queue: mp.Queue, frame_shape, model_s
# look for motion
motion_boxes = motion_detector.detect(frame)
tracked_object_boxes = [obj['box'] for obj in object_tracker.tracked_objects.values()]
# only get the tracked object boxes that intersect with motion
tracked_object_boxes = [obj['box'] for obj in object_tracker.tracked_objects.values() if intersects_any(obj['box'], motion_boxes)]
# combine motion boxes with known locations of existing objects
combined_boxes = reduce_boxes(motion_boxes + tracked_object_boxes)