{
  "_comment": "철도 구간 집중 검출용 카테고리 설정 (타일 9-24 기준)",
  "_conf_note": "conf: 클래스별 신뢰도 임계값. priority: 낮을수록 cross-class NMS에서 우선 보존(화면 위에 표시).",
  "_priority_order": "2=컨트롤박스 > 3=전철주 > 4=팬스 > 5=레일 > 6=침목 > 7=자갈(맨 밑)",
  "cross_class_nms_iou": 0.45,
  "categories": [
    {
      "name": "control_box",
      "name_kr": "컨트롤박스",
      "prompt": "small square gray metal box beside rail, compact trackside junction box, small near-square electrical enclosure on the ground, small cube-shaped equipment box next to track",
      "keywords": ["small square box", "junction box", "compact enclosure", "square metal box", "small cube box"],
      "color_bgr": [255, 255, 0],
      "conf": 0.15,
      "priority": 2
    },
    {
      "name": "catenary_pole",
      "name_kr": "전철주",
      "prompt": "railway catenary pole, overhead line pole, catenary mast, electric railway pole",
      "keywords": ["catenary pole", "overhead line pole", "catenary mast", "railway pole"],
      "color_bgr": [255, 0, 255],
      "conf": 0.25,
      "priority": 3
    },
    {
      "name": "fence",
      "name_kr": "팬스/울타리",
      "prompt": "railway fence, trackside fence, perimeter fence, chain link fence, railway boundary fence",
      "keywords": ["fence", "chain link", "perimeter fence", "boundary fence"],
      "color_bgr": [0, 255, 0],
      "conf": 0.50,
      "priority": 5
    },
    {
      "name": "railway",
      "name_kr": "철도 레일",
      "prompt": "two parallel steel rails, narrow metallic longitudinal beam, shiny steel rail line on sleeper",
      "keywords": ["railroad", "railway rail", "steel rail", "train track", "parallel rail"],
      "color_bgr": [0, 0, 255],
      "conf": 0.25,
      "priority": 4
    },
    {
      "name": "sleeper",
      "name_kr": "침목",
      "prompt": "rectangular concrete sleeper, dark crosswise tie, evenly spaced railroad tie perpendicular to rail, concrete slab between ballast",
      "keywords": ["sleeper", "railroad tie", "rail tie", "wooden tie", "concrete tie", "crosswise tie"],
      "color_bgr": [0, 128, 255],
      "conf": 0.20,
      "priority": 6
    },
    {
      "name": "ballast",
      "name_kr": "자갈도상",
      "prompt": "crushed gray stone gravel, railway ballast aggregate, coarse gravel track bed, angular stone between rails",
      "keywords": ["ballast", "gravel between rails", "track bed", "crushed stone", "aggregate"],
      "color_bgr": [30, 50, 100],
      "conf": 0.20,
      "priority": 7
    },
    {
      "name": "bracket",
      "name_kr": "브라켓/암",
      "prompt": "catenary bracket arm, horizontal cantilever arm, pole cross arm, overhead wire bracket",
      "keywords": ["bracket", "cantilever", "cross arm"],
      "color_bgr": [0, 80, 200],
      "conf": 0.20,
      "priority": 8
    },
    {
      "name": "bridge",
      "name_kr": "교량/교각",
      "prompt": "railway bridge, road bridge, overpass, viaduct, concrete bridge structure",
      "keywords": ["bridge", "overpass", "viaduct"],
      "color_bgr": [0, 165, 255],
      "conf": 0.25,
      "priority": 8
    },
    {
      "name": "retaining_wall",
      "name_kr": "방음벽/옹벽",
      "prompt": "railway retaining wall, noise barrier wall, sound barrier, concrete embankment wall",
      "keywords": ["retaining wall", "noise barrier", "sound barrier", "embankment wall"],
      "color_bgr": [60, 180, 60],
      "conf": 0.25,
      "priority": 9
    },
    {
      "name": "service_road",
      "name_kr": "유지보수 도로",
      "prompt": "railway maintenance road, service road alongside track, unpaved railway access road",
      "keywords": ["service road", "maintenance road", "access road"],
      "color_bgr": [80, 120, 160],
      "conf": 0.30,
      "priority": 10
    },
    {
      "name": "culvert",
      "name_kr": "암거/소교량",
      "prompt": "railway culvert, drainage culvert, small underpass tunnel, concrete drainage structure",
      "keywords": ["culvert", "underpass", "drainage tunnel"],
      "color_bgr": [180, 60, 180],
      "conf": 0.20,
      "priority": 9
    },
    {
      "name": "vehicle",
      "name_kr": "차량",
      "prompt": "car, truck, vehicle, automobile, van",
      "keywords": ["car", "truck", "vehicle", "automobile", "van"],
      "color_bgr": [255, 255, 255],
      "conf": 0.25,
      "priority": 2
    },
    {
      "name": "building",
      "name_kr": "건물",
      "prompt": "building, house, rooftop, structure, roof",
      "keywords": ["building", "house", "rooftop", "structure", "roof"],
      "color_bgr": [50, 50, 255],
      "conf": 0.25,
      "priority": 8
    },
    {
      "name": "farmland",
      "name_kr": "농지",
      "prompt": "farmland, agricultural field, cropland, vegetable garden",
      "keywords": ["farmland", "field", "cropland", "vegetable", "agricultural"],
      "color_bgr": [50, 200, 50],
      "conf": 0.25,
      "priority": 11
    },
    {
      "name": "vegetation",
      "name_kr": "식생",
      "prompt": "trees, forest, shrubs, vegetation, bushes",
      "keywords": ["tree", "forest", "shrub", "vegetation", "bush"],
      "color_bgr": [0, 120, 0],
      "conf": 0.25,
      "priority": 12
    }
  ]
}