{
  "camera_id": "adti26",
  "intrinsics_3x3": [
    [1234.5, 0.0,    640.0],
    [0.0,    1234.5, 360.0],
    [0.0,    0.0,    1.0]
  ],
  "distortion": [0.0, 0.0, 0.0, 0.0, 0.0],
  "body_to_camera_se3": {
    "rotation_xyzw": [0.0, 0.0, 0.0, 1.0],
    "translation_xyz_m": [0.0, 0.0, 0.0]
  },
  "acquisition_method": "calibration_target_aligned",
  "metadata": {
    "note": "Test fixture; replaced in production by adti20.json."
  }
}