{
  "measurement": "Projected centre-to-centre gap between lower two arrow-indicated pores in panel F",
  "source_sha256": "b8d1e8a71722aad26fc7596f9f9ba9abe172bf211cfaa0f4b070881ca7a7c3e1",
  "source_size_px": [
    2013,
    1738
  ],
  "coordinates_origin": "top left; x right; y down; full extracted Figure 2 raster",
  "points_xy": [
    [
      1030.0,
      863.0
    ],
    [
      1220.0,
      835.0
    ]
  ],
  "point_localization_sensitivity_radius_px": 3.0,
  "scale_bar_edge_coordinates_xy": [
    [
      1222.5,
      1133
    ],
    [
      1362.5,
      1133
    ]
  ],
  "scale_bar_length_px": 140.0,
  "scale_bar_label_um": 100.0,
  "scale_bar_endpoint_sensitivity_px": 1.0,
  "distance_px": 192.0520762709948,
  "um_per_source_px": 0.7142857142857143,
  "projected_distance_um": 137.180054479282,
  "sensitivity_low_um": 131.0225889232358,
  "sensitivity_high_um": 143.5159972978223,
  "sensitivity_definition": "Worst-case endpoint movement within 3-pixel-radius discs and independent scale-bar endpoint shifts of 1 pixel. This is a declared sensitivity scenario, not a confidence interval or full metrology uncertainty.",
  "status": "Exploratory; independent anatomical and endpoint review pending",
  "claims_excluded": [
    "surface geodesic distance",
    "population pore spacing",
    "species discrimination",
    "automated performance"
  ],
  "pipeline_execution": "Source registration, manual panel selection, manual point placement and deterministic geometry; no trained PRISM model run."
}