{
  "id": 91008,
  "title": "submission error: The same pixel may not be assigned to two different objects.",
  "url": "/competitions/imaterialist-fashion-2019-FGVC6/discussion/91008",
  "author_name": "",
  "post_date": "2019-04-30T05:36:22.845580400Z",
  "votes": 1,
  "comment_count": 6,
  "views": 0,
  "content": "<p>Hi,\njust want to know how this submission error happens.\nThanks</p>\n\n<p><code>\n3 Exceptions:\nThe same pixel may not be assigned to two different objects.\nThe same pixel may not be assigned to two different objects.\nThe same pixel may not be assigned to two different objects.\n</code></p>",
  "messages": [
    {
      "id": "525056",
      "postDate": "04/30/2019 05:36:22",
      "content": "<p>Hi,\njust want to know how this submission error happens.\nThanks</p>\n\n<p><code>\n3 Exceptions:\nThe same pixel may not be assigned to two different objects.\nThe same pixel may not be assigned to two different objects.\nThe same pixel may not be assigned to two different objects.\n</code></p>",
      "rawMarkdown": "Hi,\njust want to know how this submission error happens.\nThanks\n\n```\n3 Exceptions:\nThe same pixel may not be assigned to two different objects.\nThe same pixel may not be assigned to two different objects.\nThe same pixel may not be assigned to two different objects.\n```",
      "votes": null
    },
    {
      "id": "525064",
      "postDate": "04/30/2019 06:08:47",
      "content": "<p>You have overlapping masks in the same image.</p>",
      "rawMarkdown": "You have overlapping masks in the same image.",
      "votes": null
    },
    {
      "id": "525067",
      "postDate": "04/30/2019 06:17:39",
      "content": "<p><a href=\"/divrikwicky\">@divrikwicky</a> Thanks for the reply. \nIf the image contains a jacket, and we want to detect the jacket as a whole and its collar, pockets, etc.,\nthen the mask of its collar and pockets should be overlapped with jackets.\nAm I correct?</p>",
      "rawMarkdown": "divrikwicky Thanks for the reply. \nIf the image contains a jacket, and we want to detect the jacket as a whole and its collar, pockets, etc.,\nthen the mask of its collar and pockets should be overlapped with jackets.\nAm I correct?",
      "votes": null
    },
    {
      "id": "525225",
      "postDate": "04/30/2019 13:28:58",
      "content": "<p>you are right. masks across different classes can have overlapped pixels. But masks with the same class in the same image should not be overlapped.</p>",
      "rawMarkdown": "you are right. masks across different classes can have overlapped pixels. But masks with the same class in the same image should not be overlapped.",
      "votes": null
    },
    {
      "id": "525253",
      "postDate": "04/30/2019 14:53:11",
      "content": "<p>Thanks for the clarification!</p>",
      "rawMarkdown": "Thanks for the clarification!",
      "votes": null
    },
    {
      "id": "529230",
      "postDate": "05/09/2019 13:29:36",
      "content": "<p>How can one overcome this exception?</p>",
      "rawMarkdown": "How can one overcome this exception?",
      "votes": null
    },
    {
      "id": "536737",
      "postDate": "05/25/2019 06:00:26",
      "content": "<p>What is the best way to avoid this error? \nShould I somehow prevent my model from predicting the same class twice in an image, or should I combine combine multiple masks into one when it does predict multiple?</p>",
      "rawMarkdown": "What is the best way to avoid this error? \nShould I somehow prevent my model from predicting the same class twice in an image, or should I combine combine multiple masks into one when it does predict multiple?",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 525064,
      "author_name": "aerdem4",
      "author_url": "",
      "post_date": "04/30/2019 06:08:47",
      "content": "<p>You have overlapping masks in the same image.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 525067,
      "author_name": "lzhbrian",
      "author_url": "",
      "post_date": "04/30/2019 06:17:39",
      "content": "<p><a href=\"/divrikwicky\">@divrikwicky</a> Thanks for the reply. \nIf the image contains a jacket, and we want to detect the jacket as a whole and its collar, pockets, etc.,\nthen the mask of its collar and pockets should be overlapped with jackets.\nAm I correct?</p>",
      "votes": null,
      "replies": [
        {
          "id": 525225,
          "author_name": "makeitworkjml",
          "author_url": "",
          "post_date": "04/30/2019 13:28:58",
          "content": "<p>you are right. masks across different classes can have overlapped pixels. But masks with the same class in the same image should not be overlapped.</p>",
          "votes": null,
          "replies": []
        },
        {
          "id": 525253,
          "author_name": "lzhbrian",
          "author_url": "",
          "post_date": "04/30/2019 14:53:11",
          "content": "<p>Thanks for the clarification!</p>",
          "votes": null,
          "replies": []
        },
        {
          "id": 536737,
          "author_name": "cherring",
          "author_url": "",
          "post_date": "05/25/2019 06:00:26",
          "content": "<p>What is the best way to avoid this error? \nShould I somehow prevent my model from predicting the same class twice in an image, or should I combine combine multiple masks into one when it does predict multiple?</p>",
          "votes": null,
          "replies": []
        }
      ]
    },
    {
      "id": 529230,
      "author_name": "chandanverma",
      "author_url": "",
      "post_date": "05/09/2019 13:29:36",
      "content": "<p>How can one overcome this exception?</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "525056": "Hi,\njust want to know how this submission error happens.\nThanks\n\n```\n3 Exceptions:\nThe same pixel may not be assigned to two different objects.\nThe same pixel may not be assigned to two different objects.\nThe same pixel may not be assigned to two different objects.\n```",
    "525064": "You have overlapping masks in the same image.",
    "525067": "divrikwicky Thanks for the reply. \nIf the image contains a jacket, and we want to detect the jacket as a whole and its collar, pockets, etc.,\nthen the mask of its collar and pockets should be overlapped with jackets.\nAm I correct?",
    "525225": "you are right. masks across different classes can have overlapped pixels. But masks with the same class in the same image should not be overlapped.",
    "525253": "Thanks for the clarification!",
    "529230": "How can one overcome this exception?",
    "536737": "What is the best way to avoid this error? \nShould I somehow prevent my model from predicting the same class twice in an image, or should I combine combine multiple masks into one when it does predict multiple?"
  },
  "source": "meta"
}