COCO
coco数据集官网：https://cocodataset.org/#format-data
labelfree扩展信息
- shape：图形类型
- meta：元数据
- annotator：标注员数据
- points：点、线数据
- result_type：结果类型，ground_truth为实际结果,consensus_test为一致性测试结果
"shape": "point", // 图形类型
"meta": { // labelfree 元数据
"annotator": "labeluser@qq.com", // 标注员数据
"points": [{"x":100, "y": 120}], // 点数据
"result_type": "consensus_test", // ground_truth为实际结果,consensus_test为一致性测试结果
}
目录结构
coco
├── annotations
│ ├── stuff_train2014.json
│ ├── stuff_train2017.json
│ ├── stuff_val2014.json
│ ├── stuff_val2017.json
│ | ...
├── train2017
│ ├── 000000000009.jpg
│ ├── 000000580008.jpg
│ | ...
├── val2017
│ ├── 000000000139.jpg
│ ├── 000000000285.jpg
│ | ...
| ...
Demo:
{
"info": {
"contributor": "...",
"about": "...",
"date_created": "...",
"description": "...",
"url": "...",
"version": "1.0",
"year": 2020
},
"categories": [
{"supercategory": "person","id": 1,"name": "person"},
{"supercategory": "vehicle","id": 2,"name": "bicycle"},
{"supercategory": "vehicle","id": 3,"name": "car"},
{"supercategory": "vehicle","id": 4,"name": "motorcycle"},
{"supercategory": "vehicle","id": 5,"name": "airplane"},
],
"images": [
{
"id": 20289,
"file_name": "000000020289.jpg",
"width": 300,
"height": 300
},
{
"id": 45176,
"file_name": "000000045176.jpg",
"width": 300,
"height": 300
}
],
"annotations": [
{
"id": 377545,
"image_id": 44153,
"segmentation": [
[152.0, 180.0, 156.0, 176.0, 160.0, 181.0, 156.0, 186.0, 152.0, 180.0]
],
"area": 42.0,
"bbox": [152.0, 152.0, 28.0, 8.0],
"category_id": 100,
"iscrowd": 0
},
{
"id": 446305,
"image_id": 52178,
"segmentation": [
[257, 123, 243, 123, 243, 112, 257, 112, 257, 123]
],
"area": 154.0,
"bbox": [123, 243, 134, 14],
"category_id": 100,
"iscrowd": 0,
"shape": "point",
"meta": {
"annotator": "labeluser@qq.com",
"points": [{"x":100, "y": 120}]
}
}
]
}
Annotation文件格式
总体格式：
{
"info": info, // 字典,图片基本信息，时间，版本，贡献者，可为空
"licenses": [license], //列表，内容为字典，版权许可证，可为空
"images":[image], // 列表，内容为字典
"annotations":[annotation], // 列表，内容为字典
"categories":[category] // 列表，内容为字典，列表长度等同于数据集类别的数
}
info内容：
"info":
{
"description": "COCO 2017 Dataset", // 描述
"url": "http://cocodataset.org", // 图片地址
"version": "1.0", // 版本
"year": 2017, // 年份
"contributor": "COCO Consortium", // 贡献者
"date_created": "2017/09/01" // 创建时间
}
license内容：
"licenses": [
{
"url": "http://creativecommons.org/licenses/by-nc-sa/2.0/", // 许可证网路路径
"id": 1, // 许可证ID
"name": "Attribution-NonCommercial-ShareAlike License" // 许可证名称
}]
images内容：
"images":
[{
"license": 4, // license id
"file_name": "000000397133.jpg", //图片文件名
"coco_url": "http://labelfree.com/val2017/397133.jpg", //图片网络地址路径
"height": 427, // 图像高度
"width": 640, // 图像宽度
"date_captured": "2013-11-14 17:02:52", //拍摄日期
"flickr_url": "http://ickr.com/6116/2c9e_z.jpg", // flickr网络地址
"id": 397133 //图片的身份ID
}]
categories内容：
annotation内容：
"annotations":[
{
"segmentation": [
[
510.66,
423.01,
511.72,
...
423.01,
510.45,
423.01
] // 分割信息
],
"area": 702.1057499999998, //segmentation的面积
"iscrowd": 0, // 0：多边形 1: rle编码的mask
"image_id": 289343, // 图片的身份ID
"bbox":[
473.07,
395.93,
38.65,
28.67], // 目标框位置 [x,y,width,height]
"category_id": 18, // 标签类别ID
"id": 1768, // 框的身份编号
"shape": "point", // 图形类型
"meta": { // labelfree 元数据
"annotator": "labeluser@qq.com", // 标注员数据
"points": [{"x":100, "y": 120}], // 点数据
"result_type": "consensus_test", // ground_truth为实际结果,consensus_test为一致性测试结果
}
}]
segmentation内容
多边形
- "iscrowd": 0
掩膜
- "iscrowd": 1
"segmentation": {
"size": [300, 300],
"counts": "`l>Y1R83N1O00O10000001OO1000000000000000000000000000000000000000000O10O10000000000000000000000000001O0000000000000000000000000000000000000000000000O10000000000001O00000000000000000001O0000000O10000000000000000000000000000000000000000000000001O00000000000000000000000000000000000000001O000001O000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000d1"
},