{
  "id": 47942,
  "title": "Why the LB score goes down despite the improvement of mean iou?",
  "url": "/competitions/data-science-bowl-2018/discussion/47942",
  "author_name": "",
  "post_date": "2018-01-21T02:45:39.765006200Z",
  "votes": null,
  "comment_count": 1,
  "views": 0,
  "content": "<p><a href=\"https://www.kaggle.com/takuok/keras-generator-starter-lb-0-304\">https://www.kaggle.com/takuok/keras-generator-starter-lb-0-304</a>\n<br>\nHere is my kernel. <br>\nThis kernel got 0.8661 val mean iou score and 0.304 LB score.<br>\nAfter changing epochs to 30, I got 0.8867 val mean iou score. But LB score is 0.301. <br>\nI feel this strange.<br>\nWhy the LB score goes down despite the improvement of mean iou?</p>",
  "messages": [
    {
      "id": "271651",
      "postDate": "01/21/2018 02:45:39",
      "content": "<p><a href=\"https://www.kaggle.com/takuok/keras-generator-starter-lb-0-304\">https://www.kaggle.com/takuok/keras-generator-starter-lb-0-304</a>\n<br>\nHere is my kernel. <br>\nThis kernel got 0.8661 val mean iou score and 0.304 LB score.<br>\nAfter changing epochs to 30, I got 0.8867 val mean iou score. But LB score is 0.301. <br>\nI feel this strange.<br>\nWhy the LB score goes down despite the improvement of mean iou?</p>",
      "rawMarkdown": "https://www.kaggle.com/takuok/keras-generator-starter-lb-0-304\n<br>\nHere is my kernel. <br>\nThis kernel got 0.8661 val mean iou score and 0.304 LB score.<br>\nAfter changing epochs to 30, I got 0.8867 val mean iou score. But LB score is 0.301. <br>\nI feel this strange.<br>\nWhy the LB score goes down despite the improvement of mean iou?",
      "votes": null
    },
    {
      "id": "271741",
      "postDate": "01/21/2018 09:57:13",
      "content": "<p>Sorry...<br>\nI made a mistake in my generator code. Solved this problem.</p>",
      "rawMarkdown": "Sorry...<br>\nI made a mistake in my generator code. Solved this problem.",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 271741,
      "author_name": "takuok",
      "author_url": "",
      "post_date": "01/21/2018 09:57:13",
      "content": "<p>Sorry...<br>\nI made a mistake in my generator code. Solved this problem.</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "271651": "https://www.kaggle.com/takuok/keras-generator-starter-lb-0-304\n<br>\nHere is my kernel. <br>\nThis kernel got 0.8661 val mean iou score and 0.304 LB score.<br>\nAfter changing epochs to 30, I got 0.8867 val mean iou score. But LB score is 0.301. <br>\nI feel this strange.<br>\nWhy the LB score goes down despite the improvement of mean iou?",
    "271741": "Sorry...<br>\nI made a mistake in my generator code. Solved this problem."
  },
  "source": "meta"
}