{
  "id": 123385,
  "title": "The coordinate system of this competiton!",
  "url": "/competitions/pku-autonomous-driving/discussion/123385",
  "author_name": "DiegoJohnson",
  "post_date": "2019-12-27T09:10:29.659000",
  "votes": 8,
  "comment_count": 5,
  "views": 0,
  "content": "The coordinate system this competition uses isn't usual car coordinate system like this:\n\n<p><img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-user-content/o/inbox%2F3876174%2F62b26b9e4af39153429d6c899133b238%2F2019-12-27_165411.png?generation=1577436871677449&amp;alt=media\" alt=\"\"></p>\n\n<h3>They just use the camera coordinate system(clockwise is positive):</h3>\n\n<ul>\n<li>acutually, it has been stated in Data Description : Note that rotation values are angles expressed in radians, relative to the camera.\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-user-content/o/inbox%2F3876174%2F5960ab8adf7f658a86e6837ea307c462%2Finbox_2234817_fb4e9654bd6758e684bbc0388397f205_Sensor_Coordinate_System.png?generation=1577435998971342&amp;alt=media\" alt=\"\"></li>\n</ul>\n\n<h3>We can use it with no change, or you can convert it to the form you get used to.</h3>\n\n<p>```</p>\n\n<h1>anticlockwise is positive</h1>\n\n<p>yaw, pitch, roll = -pitch, -yaw, -roll</p>\n\n<p>```</p>\n\n<h3>You can get a clear view in this <a href=\"https://www.kaggle.com/diegojohnson/a-clear-view-of-car-pose\">Notebook</a>.</h3>\n\n<p>Please upvote, if you like it.😃 </p>",
  "messages": [
    {
      "id": 704281,
      "postDate": "2019-12-27T09:10:29.660Z",
      "content": "The coordinate system this competition uses isn't usual car coordinate system like this:\n\n<p><img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-user-content/o/inbox%2F3876174%2F62b26b9e4af39153429d6c899133b238%2F2019-12-27_165411.png?generation=1577436871677449&amp;alt=media\" alt=\"\"></p>\n\n<h3>They just use the camera coordinate system(clockwise is positive):</h3>\n\n<ul>\n<li>acutually, it has been stated in Data Description : Note that rotation values are angles expressed in radians, relative to the camera.\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-user-content/o/inbox%2F3876174%2F5960ab8adf7f658a86e6837ea307c462%2Finbox_2234817_fb4e9654bd6758e684bbc0388397f205_Sensor_Coordinate_System.png?generation=1577435998971342&amp;alt=media\" alt=\"\"></li>\n</ul>\n\n<h3>We can use it with no change, or you can convert it to the form you get used to.</h3>\n\n<p>```</p>\n\n<h1>anticlockwise is positive</h1>\n\n<p>yaw, pitch, roll = -pitch, -yaw, -roll</p>\n\n<p>```</p>\n\n<h3>You can get a clear view in this <a href=\"https://www.kaggle.com/diegojohnson/a-clear-view-of-car-pose\">Notebook</a>.</h3>\n\n<p>Please upvote, if you like it.😃 </p>",
      "rawMarkdown": "#### The coordinate system this competition uses isn't usual car coordinate system like this:\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-user-content/o/inbox%2F3876174%2F62b26b9e4af39153429d6c899133b238%2F2019-12-27_165411.png?generation=1577436871677449&amp;alt=media)\n\n### They just use the camera coordinate system(clockwise is positive):\n- acutually, it has been stated in Data Description : Note that rotation values are angles expressed in radians, relative to the camera.\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-user-content/o/inbox%2F3876174%2F5960ab8adf7f658a86e6837ea307c462%2Finbox_2234817_fb4e9654bd6758e684bbc0388397f205_Sensor_Coordinate_System.png?generation=1577435998971342&amp;alt=media)\n\n### We can use it with no change, or you can convert it to the form you get used to.\n```\n# anticlockwise is positive\nyaw, pitch, roll = -pitch, -yaw, -roll\n\n```\n### You can get a clear view in this [Notebook](https://www.kaggle.com/diegojohnson/a-clear-view-of-car-pose).\n\nPlease upvote, if you like it.😃 ",
      "votes": 8
    },
    {
      "id": 704396,
      "postDate": "2019-12-27T12:32:06.647Z",
      "content": "<p>If there's anything wrong, feel free to point it out.</p>",
      "rawMarkdown": "If there's anything wrong, feel free to point it out.",
      "replies": [
        {
          "id": 705100,
          "postDate": "2019-12-28T12:23:31.877Z",
          "content": "<p>is yaw and pitch is exchanged ??</p>",
          "rawMarkdown": "is yaw and pitch is exchanged ??\n\n"
        },
        {
          "id": 705144,
          "postDate": "2019-12-28T14:17:26.773Z",
          "content": "<p>Yeah, or you can ignore its literal meaning, just regard it as a symbol.</p>",
          "rawMarkdown": "Yeah, or you can ignore its literal meaning, just regard it as a symbol."
        }
      ]
    },
    {
      "id": 706317,
      "postDate": "2019-12-30T08:34:28.767Z",
      "rawMarkdown": "",
      "isDeleted": true
    },
    {
      "id": 706997,
      "postDate": "2019-12-31T06:20:19.540Z",
      "content": "<p>thanks</p>",
      "rawMarkdown": "thanks"
    }
  ],
  "comments": [
    {
      "id": 704396,
      "author_name": "DiegoJohnson",
      "author_url": "",
      "post_date": "2019-12-27T12:32:06.647000",
      "content": "<p>If there's anything wrong, feel free to point it out.</p>",
      "votes": 0,
      "replies": [
        {
          "id": 705100,
          "author_name": "aditya raj",
          "author_url": "",
          "post_date": "2019-12-28T12:23:31.877000",
          "content": "<p>is yaw and pitch is exchanged ??</p>",
          "votes": 0,
          "replies": []
        },
        {
          "id": 705144,
          "author_name": "DiegoJohnson",
          "author_url": "",
          "post_date": "2019-12-28T14:17:26.773000",
          "content": "<p>Yeah, or you can ignore its literal meaning, just regard it as a symbol.</p>",
          "votes": 0,
          "replies": []
        }
      ]
    },
    {
      "id": 706317,
      "author_name": "",
      "author_url": "",
      "post_date": "2019-12-30T08:34:28.767000",
      "content": "",
      "votes": 0,
      "replies": []
    },
    {
      "id": 706997,
      "author_name": "Kuo.Su",
      "author_url": "",
      "post_date": "2019-12-31T06:20:19.540000",
      "content": "<p>thanks</p>",
      "votes": 0,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "704281": "#### The coordinate system this competition uses isn't usual car coordinate system like this:\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-user-content/o/inbox%2F3876174%2F62b26b9e4af39153429d6c899133b238%2F2019-12-27_165411.png?generation=1577436871677449&amp;alt=media)\n\n### They just use the camera coordinate system(clockwise is positive):\n- acutually, it has been stated in Data Description : Note that rotation values are angles expressed in radians, relative to the camera.\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-user-content/o/inbox%2F3876174%2F5960ab8adf7f658a86e6837ea307c462%2Finbox_2234817_fb4e9654bd6758e684bbc0388397f205_Sensor_Coordinate_System.png?generation=1577435998971342&amp;alt=media)\n\n### We can use it with no change, or you can convert it to the form you get used to.\n```\n# anticlockwise is positive\nyaw, pitch, roll = -pitch, -yaw, -roll\n\n```\n### You can get a clear view in this [Notebook](https://www.kaggle.com/diegojohnson/a-clear-view-of-car-pose).\n\nPlease upvote, if you like it.😃 ",
    "704396": "If there's anything wrong, feel free to point it out.",
    "706317": "",
    "706997": "thanks"
  }
}