Pair single-camera results the way the stereo track-and-measure pipelines do

client/dive-common/singleCamera/association.ts

@@ -20,13 +20,20 @@ connect from clock.timestamp
 process pairing
   :: compute_measurements
   :matching_methods input_pairs_only
-  :detection_pairing_method calibration
-  :detection_pairing_threshold 10
   :calibration_file calibration.json
+  :min_track_states 0
+  # Same pairing as VIAME's stereo track-and-measure pipelines: head/tail
+  # keypoints where both cameras have them, box geometry (epipolar) otherwise.
+  :detection_pairing_method keypoint_projection,calibration
+  :detection_pairing_threshold 50.0
+  :detection_pairing_require_class_match false
+  :max_stereo_rms 20.0
+  :max_bbox_area_ratio 3.0
   :accumulate_track_pairings true
   :pairing_resolution_method most_likely
   :detection_split_threshold 1
   :output_unmatched true
+  # Each camera keeps the classes its own pipeline produced.
   :average_stereo_classes false
 
 connect from timestamps.timestamp

docs/Multicamera-data.md

@@ -228,7 +228,7 @@ Single camera pipelines can be used by selecting the camera and then running the
 When other cameras already have detections, DIVE prompts before launch:
 
 - **No** / **Continue** (separate) — remaps new TrackIds above every ID on the other cameras so IDs do not collide.
-- **Yes** (associate) — only offered for calibrated stereo with interactive stereo features enabled. Runs VIAME association and **replaces annotations on both cameras** with the paired result.
+- **Yes** (associate) — only offered for calibrated stereo with interactive stereo features enabled. Runs VIAME association and **replaces annotations on both cameras** with the paired result. Pairing works the way VIAME's stereo track-and-measure pipelines pair cameras: by head/tail keypoints where both cameras have them, and by box position against the stereo geometry otherwise; a track's classes are kept as its own camera's pipeline produced them.
 
 When association is unavailable (plain multicam, missing calibration, or stereo features off), the dialog explains why and only offers separate-ID remapping.
 

server/dive_tasks/single_camera_pipeline.py

@@ -49,9 +49,13 @@ def association_pipeline():
 process pairing
   :: compute_measurements
   :matching_methods input_pairs_only
-  :detection_pairing_method calibration
-  :detection_pairing_threshold 10
   :calibration_file calibration.json
+  :min_track_states 0
+  :detection_pairing_method keypoint_projection,calibration
+  :detection_pairing_threshold 50.0
+  :detection_pairing_require_class_match false
+  :max_stereo_rms 20.0
+  :max_bbox_area_ratio 3.0
   :accumulate_track_pairings true
   :pairing_resolution_method most_likely
   :detection_split_threshold 1

server/tests/test_single_camera_pipeline.py

@@ -139,3 +139,19 @@ def test_real_stereo_association(tmp_path):
     unmatched = [row[0] for row in left + right if 'crab' in row or 'shark' in row]
     assert len(set(unmatched)) == 2
     assert set(unmatched).isdisjoint({row[0] for row in left_fish})
+
+
+def test_worker_pairing_settings_match_desktop():
+    desktop = (
+        Path(__file__).parents[2] / 'client/dive-common/singleCamera/association.ts'
+    ).read_text()
+
+    def pairing_settings(pipeline):
+        pairing = pipeline.split('process pairing', 1)[1].split('connect from', 1)[0]
+        return dict(
+            line.strip()[1:].split(None, 1)
+            for line in pairing.splitlines()
+            if line.strip().startswith(':') and not line.strip().startswith('::')
+        )
+
+    assert pairing_settings(module.association_pipeline()) == pairing_settings(desktop)