outputs/background_probe/verification.json

{
  "n_frames": 251,
  "total_drawn_px": 12338665,
  "mask_mismatch_px": 0,
  "mask_mismatch_fraction": 0.0,
  "real_control_pixel_mae": 3.2881801502296506,
  "real_control_pixel_mae_note": "mean abs diff, robot region only, uncompressed render vs H.264-decoded outputs/appearance_holdout .../control.mp4 -- nonzero is expected compression noise, not a behaviour change; only mask_mismatch_fraction checks the algorithm itself",
  "plate_stats": {
    "n_frames": 251,
    "corner_median_abs_diff": 1.0,
    "static_camera_ok": true
  },
  "plate_non_static_camera_warnings": []
}