{
  "n_points": 103,
  "v1": {
    "rmse_mm": 132.9803,
    "max_err_mm": 222.3637,
    "t": [
      -10.288,
      40.609,
      -481.44
    ],
    "R_diag": [
      0.999368,
      0.999384,
      0.999789
    ]
  },
  "v4": {
    "rmse_mm": 0.0014,
    "max_err_mm": 0.0024,
    "t": [
      0.0,
      0.0,
      0.001
    ],
    "R_diag": [
      1.0,
      1.0,
      1.0
    ]
  },
  "verdict": "v4 채택 (RMSE 0.001mm)"
}