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manifest.py

@@ -1,13 +1,36 @@
 import json
 
 
-def build_manifest(filename: str, detections: list[dict]) -> list[dict]:
+def _iou(box_a, box_b):
+    """Compute intersection-over-union for two [x1, y1, x2, y2] boxes."""
+    x1 = max(box_a[0], box_b[0])
+    y1 = max(box_a[1], box_b[1])
+    x2 = min(box_a[2], box_b[2])
+    y2 = min(box_a[3], box_b[3])
+    inter = max(0, x2 - x1) * max(0, y2 - y1)
+    area_a = (box_a[2] - box_a[0]) * (box_a[3] - box_a[1])
+    area_b = (box_b[2] - box_b[0]) * (box_b[3] - box_b[1])
+    union = area_a + area_b - inter
+    return inter / union if union > 0 else 0.0
+
+
+def deduplicate(new_dets: list[dict], existing_dets: list[dict], iou_threshold: float = 0.5) -> list[dict]:
+    """Return only new detections that don't overlap with existing ones."""
+    unique = []
+    for new in new_dets:
+        is_dup = any(_iou(new["box"], ex["box"]) >= iou_threshold for ex in existing_dets)
+        if not is_dup:
+            unique.append(new)
+    return unique
+
+
+def build_manifest(detections: list[dict]) -> list[dict]:
     """Filter accepted+labeled detections and build manifest entries."""
     manifest = []
     for det in detections:
         if det.get("accepted") and det.get("label"):
             manifest.append({
-                "image_path": filename,
+                "image_path": det.get("image_path", ""),
                 "object_id": det["id"],
                 "label": det["label"],
                 "bbox": det["box"],