{
  "id": 194739,
  "title": "Agent Dataset - Histories of Agents",
  "url": "/competitions/lyft-motion-prediction-autonomous-vehicles/discussion/194739",
  "author_name": "",
  "post_date": "2020-11-02T13:25:50.518497500Z",
  "votes": 2,
  "comment_count": 3,
  "views": 0,
  "content": "<p>One image from the Agent Dataset with its histories drawn looks like the below. As per my understanding this depicts the ego(green), one agent and the semantic map in rgb.</p>\n<p>Hence I should be seeing <strong>only the histories of Ego and Agent</strong>. Why are the histories of other agents in the image visible ?  I think I am probably misunderstanding something here - Thanks.</p>\n<p>EDIT: Answering my own question, the histories of other agents are all present in the Image data - wonder why i didn't realise that earlier. </p>\n<p><img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F4822473%2Fe50870e1d00a88b2745d93368106b2c4%2FTrajectories%20of%20Multiple%20Agents.png?generation=1604323275088633&amp;alt=media\" alt=\"\"></p>\n<p>Another higher resolution image taken from <a href=\"https://www.kaggle.com/c/lyft-motion-prediction-autonomous-vehicles/discussion/178323\" target=\"_blank\">here</a></p>\n<p><img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F864684%2F47b83af93978fbaee9a89c2f87dfe76c%2Fraster_test_667_02.png?generation=1598711708763131&amp;alt=media\" alt=\"\"></p>",
  "messages": [
    {
      "id": "1067321",
      "postDate": "11/02/2020 13:25:50",
      "content": "<p>One image from the Agent Dataset with its histories drawn looks like the below. As per my understanding this depicts the ego(green), one agent and the semantic map in rgb.</p>\n<p>Hence I should be seeing <strong>only the histories of Ego and Agent</strong>. Why are the histories of other agents in the image visible ?  I think I am probably misunderstanding something here - Thanks.</p>\n<p>EDIT: Answering my own question, the histories of other agents are all present in the Image data - wonder why i didn't realise that earlier. </p>\n<p><img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F4822473%2Fe50870e1d00a88b2745d93368106b2c4%2FTrajectories%20of%20Multiple%20Agents.png?generation=1604323275088633&amp;alt=media\" alt=\"\"></p>\n<p>Another higher resolution image taken from <a href=\"https://www.kaggle.com/c/lyft-motion-prediction-autonomous-vehicles/discussion/178323\" target=\"_blank\">here</a></p>\n<p><img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F864684%2F47b83af93978fbaee9a89c2f87dfe76c%2Fraster_test_667_02.png?generation=1598711708763131&amp;alt=media\" alt=\"\"></p>",
      "rawMarkdown": "One image from the Agent Dataset with its histories drawn looks like the below. As per my understanding this depicts the ego(green), one agent and the semantic map in rgb.\n\nHence I should be seeing **only the histories of Ego and Agent**. Why are the histories of other agents in the image visible ?  I think I am probably misunderstanding something here - Thanks.\n\nEDIT: Answering my own question, the histories of other agents are all present in the Image data - wonder why i didn't realise that earlier. \n\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F4822473%2Fe50870e1d00a88b2745d93368106b2c4%2FTrajectories%20of%20Multiple%20Agents.png?generation=1604323275088633&alt=media)\n\n\nAnother higher resolution image taken from [here](https://www.kaggle.com/c/lyft-motion-prediction-autonomous-vehicles/discussion/178323)\n\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F864684%2F47b83af93978fbaee9a89c2f87dfe76c%2Fraster_test_667_02.png?generation=1598711708763131&alt=media)",
      "votes": null
    },
    {
      "id": "1067933",
      "postDate": "11/02/2020 21:12:34",
      "content": "<p><a href=\"https://www.kaggle.com/watzisname\" target=\"_blank\">@watzisname</a> I think your visualization a little bit wrong:</p>\n<ul>\n<li>the future trajectory of Ego or Agent showed as the pink line (but it's a bug with your visualization in the first image, I think it should be a straight line to the right)</li>\n<li>for Agents and Ego, we also see their history (the brightest green or blue colors - where the agents are now, less vivid shades - their history). For example, we see green Ego (or Agent) on the first screen and he moved from left to right.</li>\n<li>red, yellow, and light green lines are just road lines</li>\n</ul>",
      "rawMarkdown": "watzisname I think your visualization a little bit wrong:\n- the future trajectory of Ego or Agent showed as the pink line (but it's a bug with your visualization in the first image, I think it should be a straight line to the right)\n- for Agents and Ego, we also see their history (the brightest green or blue colors - where the agents are now, less vivid shades - their history). For example, we see green Ego (or Agent) on the first screen and he moved from left to right.\n- red, yellow, and light green lines are just road lines",
      "votes": null
    },
    {
      "id": "1068098",
      "postDate": "11/03/2020 03:56:41",
      "content": "<p>Hi <a href=\"https://www.kaggle.com/ihelon\" target=\"_blank\">@ihelon</a> <br>\nYou are right - I exchanged the words trajectories and histories. (I edited my question now accordingly)<br>\nThere is just one trajectory but multiple histories available. Where are the multiple histories coming from since i would expect history of only 1 ego and 1 agent? Thanks.</p>",
      "rawMarkdown": "Hi @ihelon \nYou are right - I exchanged the words trajectories and histories. (I edited my question now accordingly)\nThere is just one trajectory but multiple histories available. Where are the multiple histories coming from since i would expect history of only 1 ego and 1 agent? Thanks.",
      "votes": null
    },
    {
      "id": "1068695",
      "postDate": "11/03/2020 16:45:07",
      "content": "<p><a href=\"https://www.kaggle.com/watzisname\" target=\"_blank\">@watzisname</a> history of the other agents is part of the environment. For each ego or agent, you have the history for all objects in the frame but only one trajectory for the target object</p>",
      "rawMarkdown": "watzisname history of the other agents is part of the environment. For each ego or agent, you have the history for all objects in the frame but only one trajectory for the target object",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 1067933,
      "author_name": "ihelon",
      "author_url": "",
      "post_date": "11/02/2020 21:12:34",
      "content": "<p><a href=\"https://www.kaggle.com/watzisname\" target=\"_blank\">@watzisname</a> I think your visualization a little bit wrong:</p>\n<ul>\n<li>the future trajectory of Ego or Agent showed as the pink line (but it's a bug with your visualization in the first image, I think it should be a straight line to the right)</li>\n<li>for Agents and Ego, we also see their history (the brightest green or blue colors - where the agents are now, less vivid shades - their history). For example, we see green Ego (or Agent) on the first screen and he moved from left to right.</li>\n<li>red, yellow, and light green lines are just road lines</li>\n</ul>",
      "votes": null,
      "replies": [
        {
          "id": 1068098,
          "author_name": "watzisname",
          "author_url": "",
          "post_date": "11/03/2020 03:56:41",
          "content": "<p>Hi <a href=\"https://www.kaggle.com/ihelon\" target=\"_blank\">@ihelon</a> <br>\nYou are right - I exchanged the words trajectories and histories. (I edited my question now accordingly)<br>\nThere is just one trajectory but multiple histories available. Where are the multiple histories coming from since i would expect history of only 1 ego and 1 agent? Thanks.</p>",
          "votes": null,
          "replies": []
        },
        {
          "id": 1068695,
          "author_name": "ihelon",
          "author_url": "",
          "post_date": "11/03/2020 16:45:07",
          "content": "<p><a href=\"https://www.kaggle.com/watzisname\" target=\"_blank\">@watzisname</a> history of the other agents is part of the environment. For each ego or agent, you have the history for all objects in the frame but only one trajectory for the target object</p>",
          "votes": null,
          "replies": []
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "1067321": "One image from the Agent Dataset with its histories drawn looks like the below. As per my understanding this depicts the ego(green), one agent and the semantic map in rgb.\n\nHence I should be seeing **only the histories of Ego and Agent**. Why are the histories of other agents in the image visible ?  I think I am probably misunderstanding something here - Thanks.\n\nEDIT: Answering my own question, the histories of other agents are all present in the Image data - wonder why i didn't realise that earlier. \n\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F4822473%2Fe50870e1d00a88b2745d93368106b2c4%2FTrajectories%20of%20Multiple%20Agents.png?generation=1604323275088633&alt=media)\n\n\nAnother higher resolution image taken from [here](https://www.kaggle.com/c/lyft-motion-prediction-autonomous-vehicles/discussion/178323)\n\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F864684%2F47b83af93978fbaee9a89c2f87dfe76c%2Fraster_test_667_02.png?generation=1598711708763131&alt=media)",
    "1067933": "watzisname I think your visualization a little bit wrong:\n- the future trajectory of Ego or Agent showed as the pink line (but it's a bug with your visualization in the first image, I think it should be a straight line to the right)\n- for Agents and Ego, we also see their history (the brightest green or blue colors - where the agents are now, less vivid shades - their history). For example, we see green Ego (or Agent) on the first screen and he moved from left to right.\n- red, yellow, and light green lines are just road lines",
    "1068098": "Hi @ihelon \nYou are right - I exchanged the words trajectories and histories. (I edited my question now accordingly)\nThere is just one trajectory but multiple histories available. Where are the multiple histories coming from since i would expect history of only 1 ego and 1 agent? Thanks.",
    "1068695": "watzisname history of the other agents is part of the environment. For each ego or agent, you have the history for all objects in the frame but only one trajectory for the target object"
  },
  "source": "meta"
}