{
    "image_size": {
      "width": 512,
      "height": 512
    },
    "coordinate_system": {
      "origin": "top_left",
      "x_axis": "to_right",
      "y_axis": "downward"
    },
    "objects": [
      {
        "id": "gray_ball",
        "category": "circle",
        "color_rgb": [204, 215, 222],
        "position": { "center_x": 264.14, "center_y": 143.87 },
        "bbox": { "x_min": 240, "y_min": 118, "x_max": 287, "y_max": 169, "width": 48, "height": 52 },
        "size": { "area_pixels": 2219, "radius_pixels": 26.58 }
      },
      {
        "id": "red_ball",
        "category": "circle",
        "color_rgb": [239, 79, 69],
        "position": { "center_x": 277.5, "center_y": 295.51 },
        "bbox": { "x_min": 236, "y_min": 254, "x_max": 319, "y_max": 337, "width": 84, "height": 84 },
        "size": { "area_pixels": 5546, "radius_pixels": 42.02 }
      },
      {
        "id": "black_ball_1",
        "category": "circle",
        "color_rgb": [0, 0, 0],
        "position": { "center_x": 204.26, "center_y": 229.9 },
        "bbox": { "x_min": 194, "y_min": 220, "x_max": 214, "y_max": 240, "width": 21, "height": 21 },
        "size": { "area_pixels": 346, "radius_pixels": 10.49 }
      },
      {
        "id": "black_ball_2",
        "category": "circle",
        "color_rgb": [0, 0, 0],
        "position": { "center_x": 159.92, "center_y": 263.51 },
        "bbox": { "x_min": 150, "y_min": 254, "x_max": 170, "y_max": 273, "width": 21, "height": 20 },
        "size": { "area_pixels": 347, "radius_pixels": 10.51 }
      },
      {
        "id": "black_ball_3",
        "category": "circle",
        "color_rgb": [0, 0, 0],
        "position": { "center_x": 151.47, "center_y": 288.25 },
        "bbox": { "x_min": 141, "y_min": 278, "x_max": 161, "y_max": 298, "width": 21, "height": 21 },
        "size": { "area_pixels": 343, "radius_pixels": 10.45 }
      },
      {
        "id": "black_ball_4",
        "category": "circle",
        "color_rgb": [0, 0, 0],
        "position": { "center_x": 171.7, "center_y": 362.33 },
        "bbox": { "x_min": 162, "y_min": 352, "x_max": 182, "y_max": 372, "width": 21, "height": 21 },
        "size": { "area_pixels": 344, "radius_pixels": 10.46 }
      },
      {
        "id": "gray_u_container",
        "category": "polyline",
        "color_rgb": [215, 224, 229],
        "position": { "center_x": 283.65, "center_y": 457.2 },
        "bbox": { "x_min": 222, "y_min": 382, "x_max": 335, "y_max": 511, "width": 114, "height": 130 },
        "size": { "area_pixels": 5524, "stroke_thickness_pixels": 12.06, "path_length_pixels": 457.86 },
        "orientation": { "angle_deg": 90.0, "definition": "angle from +x axis, counter-clockwise (principal axis)" }
      },
      {
        "id": "gray_vertical_bar",
        "category": "rectangle_bar",
        "color_rgb": [205, 216, 222],
        "position": { "center_x": 352.58, "center_y": 457.01 },
        "bbox": { "x_min": 344, "y_min": 408, "x_max": 367, "y_max": 511, "width": 24, "height": 104 },
        "size": { "area_pixels": 1426, "length_pixels": 104, "thickness_pixels": 13.71 },
        "orientation": { "angle_deg": 90.0, "definition": "angle from +x axis, counter-clockwise" }
      }
    ]
  }