{
  "id": 1231,
  "title": "Question on depth data",
  "url": "/competitions/GestureChallenge/discussion/1231",
  "author_name": "",
  "post_date": "2012-01-06T20:24:14.240Z",
  "votes": null,
  "comment_count": 2,
  "views": 1822,
  "content": "<p>I'm starting to look at the Depth data from the kinect.</p>\r\n<p>It seems that it's given in a 320 x 240x 3 RGB style format. I'm not sure if I get this right, but R-G-B values for the same depth pixel seems to differs from one another by small values. Not sure where the difference comes from, I'm afraid I'm missing something\r\n more fudamental here :)</p>\r\n<p>I did not find information beside the depth scaling at the end of the readme for each Batches.&nbsp;</p>\r\n<p>From the Readme.</p>\r\n<pre>set\tnum\tmini\tmaxi\tresol\tacc\t   <br>devel\t1\t801\t1964\t76\t2</pre>\r\n&nbsp;\r\n<p>Is there units attached to min/max depth ? (cm and mm does not seems logical)</p>\r\n<p>Thanks !</p>\r\n<p>David</p>",
  "messages": [
    {
      "id": "7729",
      "postDate": "01/06/2012 20:24:14",
      "content": "<p>I'm starting to look at the Depth data from the kinect.</p>\r\n<p>It seems that it's given in a 320 x 240x 3 RGB style format. I'm not sure if I get this right, but R-G-B values for the same depth pixel seems to differs from one another by small values. Not sure where the difference comes from, I'm afraid I'm missing something\r\n more fudamental here :)</p>\r\n<p>I did not find information beside the depth scaling at the end of the readme for each Batches.&nbsp;</p>\r\n<p>From the Readme.</p>\r\n<pre>set\tnum\tmini\tmaxi\tresol\tacc\t   <br>devel\t1\t801\t1964\t76\t2</pre>\r\n&nbsp;\r\n<p>Is there units attached to min/max depth ? (cm and mm does not seems logical)</p>\r\n<p>Thanks !</p>\r\n<p>David</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "7731",
      "postDate": "01/06/2012 21:49:15",
      "content": "<p>I posted a <a href=\"http://www.kaggle.com/c/GestureChallenge/forums/t/1208/a-technical-question-on-kinect-color-data\">\r\nquestion</a> about this very point.</p>\r\n<p>&nbsp;</p>\r\n<p>My guess is to use only the Green channel, as this seems to have the biggest spread. I remove the artifact zeroes to make a continuous distribution of depth measurements.</p>\r\n<p>&nbsp;</p>\r\n<p>The contest organizers have not posted an answer to my question, so this may not be the correct path.</p>\r\n<p>&nbsp;</p>\r\n<p>Essentially this:</p>\r\n<p>&nbsp;</p>\r\n<p>$KinectZeroes = [&nbsp; 7,&nbsp; 14,&nbsp; 21,&nbsp; 28,&nbsp; 35,&nbsp; 42,&nbsp; 49,&nbsp; 56,&nbsp; 63,&nbsp; 70,&nbsp; 77,&nbsp; 84,<br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 92,&nbsp; 99, 106, 113, 120, 127, 134, 141, 148, 155, 162, 169,<br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 177, 184, 191, 198, 205, 212, 219, 226, 233, 240, 247, 254 ];</p>\r\n<p>delete $Green-&gt;[$_] foreach @{$KinectZeroes};<br>\r\n<br>\r\n@{$Green} = grep { defined $_ } @{$Green};</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "7737",
      "postDate": "01/07/2012 02:18:08",
      "content": "<p>This is a byproduct of the compression algorithm. See the Help entry under Information:</p>\r\n<p><span style=\"font-family:Helvetica,Arial,sans-serif\"><strong>&quot;Can I restore the original depth data?&quot;</strong><br>\r\n&nbsp;</span></p>",
      "rawMarkdown": "",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 7731,
      "author_name": "rajstennajbarrabas",
      "author_url": "",
      "post_date": "01/06/2012 21:49:15",
      "content": "<p>I posted a <a href=\"http://www.kaggle.com/c/GestureChallenge/forums/t/1208/a-technical-question-on-kinect-color-data\">\r\nquestion</a> about this very point.</p>\r\n<p>&nbsp;</p>\r\n<p>My guess is to use only the Green channel, as this seems to have the biggest spread. I remove the artifact zeroes to make a continuous distribution of depth measurements.</p>\r\n<p>&nbsp;</p>\r\n<p>The contest organizers have not posted an answer to my question, so this may not be the correct path.</p>\r\n<p>&nbsp;</p>\r\n<p>Essentially this:</p>\r\n<p>&nbsp;</p>\r\n<p>$KinectZeroes = [&nbsp; 7,&nbsp; 14,&nbsp; 21,&nbsp; 28,&nbsp; 35,&nbsp; 42,&nbsp; 49,&nbsp; 56,&nbsp; 63,&nbsp; 70,&nbsp; 77,&nbsp; 84,<br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 92,&nbsp; 99, 106, 113, 120, 127, 134, 141, 148, 155, 162, 169,<br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 177, 184, 191, 198, 205, 212, 219, 226, 233, 240, 247, 254 ];</p>\r\n<p>delete $Green-&gt;[$_] foreach @{$KinectZeroes};<br>\r\n<br>\r\n@{$Green} = grep { defined $_ } @{$Green};</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 7737,
      "author_name": "iguyon",
      "author_url": "",
      "post_date": "01/07/2012 02:18:08",
      "content": "<p>This is a byproduct of the compression algorithm. See the Help entry under Information:</p>\r\n<p><span style=\"font-family:Helvetica,Arial,sans-serif\"><strong>&quot;Can I restore the original depth data?&quot;</strong><br>\r\n&nbsp;</span></p>",
      "votes": null,
      "replies": []
    }
  ],
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    "7729": "",
    "7731": "",
    "7737": ""
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}