input resolution: [640, 640, 3] 
 boxes: 
 [[10.0, 17.0], [18.0, 55.0], [39.0, 26.0], [49.0, 76.0], [65.0, 181.0], [139.0, 93.0], [159.0, 305.0], [384.0, 210.0], [446.0, 486.0]]