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  "v2_990202": {
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   "resp_top": 0.9316475446777344,
   "gate_top": 1.0,
   "resp_half": 0.9597839112929356,
   "gate_half": 0.9959349593495934,
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 },
 "_meta": {
  "gt_truth": {
   "1": {
    "topdy": 64.0,
    "halfdx": 0.0,
    "note": "缓慢下摇（顶带dy主导，半带≈0=主体入画非机位）"
   },
   "2": {
    "topdy": 0.0,
    "halfdx": 131.0,
    "note": "缓慢右摇（顶带+半带同向）"
   },
   "3": {
    "topdy": 0.0,
    "halfdx": -31.0,
    "note": "轻微回摇"
   }
  },
  "zoom_gate": 5.0,
  "work_width": 608,
  "note": "读数单位=px@1216宽；resp<0.6 帧对不并入累计；pan=(L+R)/2 zoom=(L-R)/2"
 }
}