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    "story_id": "mp-2026-08-04-006",
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    "headline": "A High Agreement Score Hid Millimeters of Error",
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    "dek": "A low-cost facial depth sensor ranked people consistently but missed the precision needed for reconstruction.",
    "summary": "A low-cost facial depth sensor ranked people consistently but missed the precision needed for reconstruction.",
    "body_text": "Two observers measured 12 adults at 16 facial distances using a low-cost depth sensor, a structured-light scanner and direct calipers. Device-versus-caliper agreement looked high by intraclass correlation, at 0.88 and 0.93, yet mean absolute error was 2.75 millimeters versus 1.64 millimeters for the comparator and 14 of 16 depth-sensor distances exceeded a two-millimeter tolerance. The authors conclude that the inexpensive device suits surveys, ranking and within-person monitoring, not high-fidelity reconstruction; high correlation alone did not establish clinical usability.",
    "why_it_matters": "A low-cost facial depth sensor ranked people consistently but missed the precision needed for reconstruction.",
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      "The authors conclude that the inexpensive device suits surveys, ranking and within-person monitoring, not high-fidelity reconstruction; high correlation alone did not establish clinical usability."
    ],
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        "text": "A low-cost facial depth sensor ranked people consistently but missed the precision needed for reconstruction.",
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        "qualification": "The authors conclude that the inexpensive device suits surveys, ranking and within-person monitoring, not high-fidelity reconstruction; high correlation alone did not establish clinical usability."
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    "tags": [
      "3D sensing",
      "facial measurement",
      "validation"
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      "source_id": "source-2026-08-04-006",
      "title": "Journal of Craniofacial Surgery: low-cost facial depth-sensor validation",
      "publisher": "Wolters Kluwer Health",
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    "name": "The Machine Press",
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    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "A High Agreement Score Hid Millimeters of Error",
    "publisher": "The Machine Press",
    "published_at": "2026-08-04T09:00:00.000-04:00",
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