{
  "original": {
    "width": 1280,
    "height": 960,
    "megapixels": 1.23
  },
  "staged": {
    "width": 2048,
    "height": 1536,
    "megapixels": 3.15
  },
  "aspect_ratio": {
    "original": 1.3333,
    "staged": 1.3333,
    "deviation": 0.0,
    "pass": true
  },
  "resolution_kept": true,
  "resolution_ratio": 2.56,
  "raw_drift_score": 37.6,
  "alignment": {
    "ok": true,
    "method": "SIFT + ratio test + RANSAC similarity (estimateAffinePartial2D)",
    "keypoints_original": 276,
    "keypoints_staged": 1003,
    "matches": 75,
    "affine_anisotropy": 0.0108,
    "inliers": 54,
    "inlier_ratio": 0.72,
    "median_residual_px": 1.06,
    "matrix_staged_to_original_work": [
      [
        1.01308,
        0.00849,
        -5.52506
      ],
      [
        -0.00849,
        1.01308,
        4.18286
      ]
    ]
  },
  "framing": {
    "pass": false,
    "result": "fail: zoom 0.987; 2.5% of the output is outside the original frame",
    "zoom": 0.9871,
    "shift_px": [
      5.5,
      6.1
    ],
    "shift_pct": [
      0.43,
      0.63
    ],
    "rotation_deg": -0.48,
    "visible_overlap_pct": 99.88,
    "invented_area_pct": 2.46,
    "original_px_lost": {
      "left": 1.2,
      "right": 0.0,
      "top": 5.2,
      "bottom": 0.0
    },
    "criteria": "overlap >= 97%, zoom 0.99-1.02, |rotation| <= 0.5 deg, invented area <= 2%",
    "units": "px of the original image; shift = staged frame centre vs original centre; zoom > 1 = cropped/zoomed in"
  },
  "diagnostics": {
    "sensitive_edges": {
      "line_recall": 0.8437,
      "line_displaced_frac": 0.1033,
      "line_missing_frac": 0.053,
      "structural_line_pixels": 23248
    },
    "note": "low-threshold Canny that also sees white wall/soffit/column edges; not part of drift_score"
  },
  "architecture": {
    "edge_ssim": 0.7796,
    "line_recall": 0.6778,
    "line_displaced_frac": 0.2565,
    "line_missing_frac": 0.0658,
    "structural_line_pixels": 6235,
    "evaluated_area_frac": 0.646,
    "drift_score": 27.1,
    "aligned": true,
    "evaluated_area_frac_of_mask": 0.995,
    "mask": "auto: top 65% of frame"
  },
  "drift_score": 27.1,
  "structure": {
    "edge_ssim": 0.7542,
    "line_recall": 0.4941,
    "line_displaced_frac": 0.4401,
    "line_missing_frac": 0.0658,
    "structural_line_pixels": 6242,
    "evaluated_area_frac": 0.65,
    "drift_score": 37.6,
    "mask": "auto: top 65% of frame",
    "note": "legacy unaligned structure check (= raw_drift_score)"
  },
  "seconds_to_result": 35,
  "seconds_approx": true,
  "files": {
    "original": "photos/01-open-plan-kitchen-living.jpg",
    "staged": "results/pedra/01.jpg"
  }
}