{
    "image_id": "sample_001",
    "buildings": [
        {
            "bbox": [120, 120, 50, 50],
            "confidence": 0.95,
            "area": 2500.0
        },
        {
            "bbox": [180, 150, 30, 40],
            "confidence": 0.87,
            "area": 1200.0
        },
        {
            "bbox": [250, 200, 60, 45],
            "confidence": 0.92,
            "area": 2700.0
        }
    ]
}