【COCO API】COCO Python API

最新推荐文章于 2025-08-27 12:53:08 发布

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本文介绍了COCO数据集的标注格式，包括信息、图片、注释、许可证及类别等部分，并提供了官方代码链接用于进一步了解。

可以参考官方代码：https://github.com/dengdan/coco/blob/master/PythonAPI/pycocoDemo.ipynb

coco的标注格式如下：


{"info": 
    {"description": "This is stable 1.0 version of the 2017 MS COCO dataset.", 
     "url": "http://mscoco.org",  "version": "1.0", "year": 2017, 
     "contributor": "Microsoft COCO group", 
     "date_created": "2017-11-11 02:11:36.777541"
    }, 
    "images": [
        {"license": 2,"file_name": "000000289343.jpg",
         "coco_url": "http://images.cocodataset.org/val2017/000000289343.jpg",
         "height": 640,"width": 529,"date_captured": "2013-11-15 00:35:14",
         "flickr_url": "http://farm5.staticflickr.com/4029/4669549715_7db3735de0_z.jpg","id": 289343}, 
        ...
        {"license": 1,"file_name": "000000329219.jpg",
         "coco_url": "http://images.cocodataset.org/val2017/000000329219.jpg",
         "height": 427,"width": 640,"date_captured": "2013-11-14 19:21:56",
         "flickr_url": "http://farm9.staticflickr.com/8104/8505307842_465524a6a6_z.jpg",
         "id": 329219},
        ...
    ],
    "annotations": [
        {"segmentation": [[510.66,423.01,511.72,420.03,510.45,416.0,510...,423.01]],
         "area": 702.1057499999998,
         "iscrowd": 0,
         "image_id": 289343,
         "bbox": [473.07,395.93,38.65,28.67], "category_id": 18, "id": 1768
        },
        ...
        {"segmentation": [[304.09,266.18,308.95,263.56,313.06,262.81,...,266.55]],
         "area": 4290.290900000001,
         "iscrowd": 0,
         "image_id": 329219,
         "bbox": [297.73,252.34,60.21,108.45],"category_id": 18,"id": 8032}
    ],

    "licenses": [
        {"url": "http://creativecommons.org/licenses/by-nc-sa/2.0/", 
         "id": 1, "name": "Attribution-NonCommercial-ShareAlike License"}, 
        ...
        {"url": "http://www.usa.gov/copyright.shtml", 
         "id": 8, "name": "United States Government Work"}
    ],
    "categories": [
        {"supercategory": "person", "id": 1, "name": "person"}, 
        ...
        {"supercategory": "indoor", "id": 90, "name": "toothbrush"}
    ]
}