{
  "id": 120574,
  "title": "What's labels' coordinate system",
  "url": "/competitions/pku-autonomous-driving/discussion/120574",
  "author_name": "Xu",
  "post_date": "2019-12-07T03:02:56.219000",
  "votes": 0,
  "comment_count": 5,
  "views": 0,
  "content": "<p>In computer vision. There are many coordinate system</p>\n\n<ul>\n<li>Image plane (Xf, Yf)</li>\n<li>Camera coordinate : (Xc, Yc, Zc)</li>\n<li>Image pixel coordinate system: (Xi, Yi)</li>\n<li>World coordinate system: (Xw, Yw, Zw)</li>\n</ul>\n\n<p>So, what is the label belong to. Is the camera coordinate system? And what is the 3d car model belong to ?</p>",
  "messages": [
    {
      "id": 689544,
      "postDate": "2019-12-07T03:02:56.220Z",
      "content": "<p>In computer vision. There are many coordinate system</p>\n\n<ul>\n<li>Image plane (Xf, Yf)</li>\n<li>Camera coordinate : (Xc, Yc, Zc)</li>\n<li>Image pixel coordinate system: (Xi, Yi)</li>\n<li>World coordinate system: (Xw, Yw, Zw)</li>\n</ul>\n\n<p>So, what is the label belong to. Is the camera coordinate system? And what is the 3d car model belong to ?</p>",
      "rawMarkdown": "In computer vision. There are many coordinate system\n\n- Image plane (Xf, Yf)\n- Camera coordinate : (Xc, Yc, Zc)\n- Image pixel coordinate system: (Xi, Yi)\n- World coordinate system: (Xw, Yw, Zw)\n\nSo, what is the label belong to. Is the camera coordinate system? And what is the 3d car model belong to ?"
    },
    {
      "id": 689656,
      "postDate": "2019-12-07T08:19:30.673Z",
      "content": "<p>Camera coordinate is same with world coordinate in this competition.</p>",
      "rawMarkdown": "Camera coordinate is same with world coordinate in this competition.",
      "votes": 1
    },
    {
      "id": 689662,
      "postDate": "2019-12-07T08:27:50.113Z",
      "rawMarkdown": "",
      "votes": 1,
      "isDeleted": true
    },
    {
      "id": 689658,
      "postDate": "2019-12-07T08:23:13.097Z",
      "rawMarkdown": "",
      "isDeleted": true
    },
    {
      "id": 689657,
      "postDate": "2019-12-07T08:20:38.523Z",
      "rawMarkdown": "",
      "isDeleted": true
    },
    {
      "id": 689654,
      "postDate": "2019-12-07T08:18:43.247Z",
      "rawMarkdown": "",
      "votes": 1,
      "isDeleted": true
    }
  ],
  "comments": [
    {
      "id": 689656,
      "author_name": "DiegoJohnson",
      "author_url": "",
      "post_date": "2019-12-07T08:19:30.673000",
      "content": "<p>Camera coordinate is same with world coordinate in this competition.</p>",
      "votes": 1,
      "replies": []
    },
    {
      "id": 689662,
      "author_name": "",
      "author_url": "",
      "post_date": "2019-12-07T08:27:50.113000",
      "content": "",
      "votes": 1,
      "replies": []
    },
    {
      "id": 689658,
      "author_name": "",
      "author_url": "",
      "post_date": "2019-12-07T08:23:13.097000",
      "content": "",
      "votes": 0,
      "replies": []
    },
    {
      "id": 689657,
      "author_name": "",
      "author_url": "",
      "post_date": "2019-12-07T08:20:38.523000",
      "content": "",
      "votes": 0,
      "replies": []
    },
    {
      "id": 689654,
      "author_name": "",
      "author_url": "",
      "post_date": "2019-12-07T08:18:43.247000",
      "content": "",
      "votes": 1,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "689544": "In computer vision. There are many coordinate system\n\n- Image plane (Xf, Yf)\n- Camera coordinate : (Xc, Yc, Zc)\n- Image pixel coordinate system: (Xi, Yi)\n- World coordinate system: (Xw, Yw, Zw)\n\nSo, what is the label belong to. Is the camera coordinate system? And what is the 3d car model belong to ?",
    "689656": "Camera coordinate is same with world coordinate in this competition.",
    "689662": "",
    "689658": "",
    "689657": "",
    "689654": ""
  }
}