Add AprilTag calibration, assets, and tracking demo

analysis_output/apriltag_analysis_report.json

@@ -0,0 +1,68 @@
+{
+  "video_path": "C:\\devel\\slam_demo\\VID_20260626_142931.mp4",
+  "calibration_path": "C:\\devel\\slam_demo\\calibration_output\\camera_calibration.npz",
+  "tag_size_m": 0.2,
+  "precise_distance_m": 3.0,
+  "video": {
+    "fps": 29.490109925345436,
+    "frame_count": 3965,
+    "width": 1080,
+    "height": 1920,
+    "duration_sec": 134.45185555555557
+  },
+  "detections_total": 2043,
+  "frames_with_tags": 2042,
+  "frames_with_tags_ratio": 0.5150063051702396,
+  "detected_tag_ids": [
+    1,
+    10,
+    21,
+    31
+  ],
+  "distance_global_min_m": 0.6724304161465295,
+  "distance_global_max_m": 29.05393296811889,
+  "tag_summary": {
+    "1": {
+      "count": 649,
+      "distance_min_m": 0.6724304161465295,
+      "distance_max_m": 29.05393296811889,
+      "side_px_max": 1001.5821990966797,
+      "precise_track_frames": 265,
+      "first_seen_sec": 1.5937546560179348,
+      "last_seen_sec": 134.41794588202328
+    },
+    "10": {
+      "count": 541,
+      "distance_min_m": 0.6936149816954829,
+      "distance_max_m": 10.514124997867455,
+      "side_px_max": 962.2133636474609,
+      "precise_track_frames": 287,
+      "first_seen_sec": 24.58451331091495,
+      "last_seen_sec": 43.09919505954883
+    },
+    "21": {
+      "count": 492,
+      "distance_min_m": 1.0321140671608207,
+      "distance_max_m": 9.818515071203956,
+      "side_px_max": 658.1097869873047,
+      "precise_track_frames": 306,
+      "first_seen_sec": 25.228797108028584,
+      "last_seen_sec": 74.22827536219701
+    },
+    "31": {
+      "count": 361,
+      "distance_min_m": 1.4224853614043138,
+      "distance_max_m": 2.9749145431912978,
+      "side_px_max": 486.1072769165039,
+      "precise_track_frames": 361,
+      "first_seen_sec": 94.91317621689787,
+      "last_seen_sec": 107.32411672971837
+    }
+  },
+  "best_frame_previews": {
+    "1": "C:\\devel\\slam_demo\\analysis_output\\best_tag_01.jpg",
+    "10": "C:\\devel\\slam_demo\\analysis_output\\best_tag_10.jpg",
+    "21": "C:\\devel\\slam_demo\\analysis_output\\best_tag_21.jpg",
+    "31": "C:\\devel\\slam_demo\\analysis_output\\best_tag_31.jpg"
+  }
+}