{
  "id": 11485,
  "title": "Infering Plankton size from the images",
  "url": "/competitions/datasciencebowl/discussion/11485",
  "author_name": "",
  "post_date": "2015-01-10T19:13:14.790Z",
  "votes": 6,
  "comment_count": 4,
  "views": 1741,
  "content": "<p>the competition states:</p>\n<p>... the use of an underwater imagery sensor. This towed, underwater camera system captures microscopic, high-resolution images over large study areas.</p>\n<p>Can we infer that the camera-system has a fixed field-of-view and focus depth such that all the creatures are of approximate relative size (regardless of the image window size (20x20 vs 200x200). So a tiny creature in a small image can be compared in size to a large creature in a large image?</p>",
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      "id": "62582",
      "postDate": "01/10/2015 19:13:14",
      "content": "<p>the competition states:</p>\n<p>... the use of an underwater imagery sensor. This towed, underwater camera system captures microscopic, high-resolution images over large study areas.</p>\n<p>Can we infer that the camera-system has a fixed field-of-view and focus depth such that all the creatures are of approximate relative size (regardless of the image window size (20x20 vs 200x200). So a tiny creature in a small image can be compared in size to a large creature in a large image?</p>",
      "rawMarkdown": "",
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    {
      "id": "62585",
      "postDate": "01/10/2015 20:54:55",
      "content": "<p>Yes, the camera system has a fixed field of view and focus depth. But no - a creature that takes up the whole of a 20x20 image is not going to be the same size as a creature that takes up the whole of a 200x200 image. The pixel to length ratio for these image&nbsp;segments&nbsp;is&nbsp;constant.&nbsp;</p>\n<p>Check the FAQs for more information on how we got these segments from the raw image data.</p>\n<p>Jessica</p>",
      "rawMarkdown": "",
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    {
      "id": "62588",
      "postDate": "01/10/2015 21:24:27",
      "content": "<p>Thanks Jessica,</p>\n<p>I re-read my (awkwardly worded) question and it is not what I wanted to ask.</p>\n<p>If a creature in 20x 20 image is 10 pixels x 10 pixels can and I compare it to creature in a 200 x 200 image, where that 2nd creature is 100x100 pixels big ... can I infer that they are the same scale and that the 1st creature is really100 square pixels big, and the second is really 10,000 square pixels big ... or is there some other scaling going on that we don't know about?sorry for the confusion</p>",
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    {
      "id": "62596",
      "postDate": "01/10/2015 23:58:54",
      "content": "<p>Hi karle,</p>\n<p>No worries - and yes. That is correct. They&nbsp;are on the same scale.&nbsp;</p>\n\n<p>Jessica</p>",
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    },
    {
      "id": "62599",
      "postDate": "01/11/2015 02:23:35",
      "content": "<p>Hi Jessica.</p>\n<p>Thanks for the 'official ruling'.</p>\n<p>Karle</p>",
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  "comments": [
    {
      "id": 62585,
      "author_name": "jessicaluo",
      "author_url": "",
      "post_date": "01/10/2015 20:54:55",
      "content": "<p>Yes, the camera system has a fixed field of view and focus depth. But no - a creature that takes up the whole of a 20x20 image is not going to be the same size as a creature that takes up the whole of a 200x200 image. The pixel to length ratio for these image&nbsp;segments&nbsp;is&nbsp;constant.&nbsp;</p>\n<p>Check the FAQs for more information on how we got these segments from the raw image data.</p>\n<p>Jessica</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 62588,
      "author_name": "karle1",
      "author_url": "",
      "post_date": "01/10/2015 21:24:27",
      "content": "<p>Thanks Jessica,</p>\n<p>I re-read my (awkwardly worded) question and it is not what I wanted to ask.</p>\n<p>If a creature in 20x 20 image is 10 pixels x 10 pixels can and I compare it to creature in a 200 x 200 image, where that 2nd creature is 100x100 pixels big ... can I infer that they are the same scale and that the 1st creature is really100 square pixels big, and the second is really 10,000 square pixels big ... or is there some other scaling going on that we don't know about?sorry for the confusion</p>",
      "votes": null,
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    {
      "id": 62596,
      "author_name": "jessicaluo",
      "author_url": "",
      "post_date": "01/10/2015 23:58:54",
      "content": "<p>Hi karle,</p>\n<p>No worries - and yes. That is correct. They&nbsp;are on the same scale.&nbsp;</p>\n\n<p>Jessica</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 62599,
      "author_name": "karle1",
      "author_url": "",
      "post_date": "01/11/2015 02:23:35",
      "content": "<p>Hi Jessica.</p>\n<p>Thanks for the 'official ruling'.</p>\n<p>Karle</p>",
      "votes": null,
      "replies": []
    }
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