{
  "id": 1635,
  "title": "More observations of data",
  "url": "/competitions/GestureChallenge/discussion/1635",
  "author_name": "",
  "post_date": "2012-03-26T03:16:04.727Z",
  "votes": 1,
  "comment_count": 2,
  "views": 2191,
  "content": "<p>Apologies for starting a new thread, I can't seem to attach images to responses.</p>\r\n<p>&nbsp;</p>\r\n<p><strong>Observation:</strong> The depth image is apparently offset and bigger than the color image</p>\r\n<p>Posted below is an image which overlays the Kinect and color data (from devel03). Notice that the Kinect data is both offset to the left and bigger than the color data. That is to say, the Kinect data does not appear to be offset *above* the color image,\r\n it's simply bigger than the color image. (The red is an artifact of some processing I was doing - identifying pixels of a particular depth.)</p>\r\n<p>&nbsp;</p>\r\n<p>Any algorithm that attempts to correlate motion between the two frames will need to take this into account.</p>\r\n<p>&nbsp;</p>\r\n<p><strong>Observation:</strong> The color stream is of marginal utility</p>\r\n<p>&nbsp;</p>\r\n<p>I've also uploaded 3 selected images from the videos of the lexicon of devel03. Notice anything unusual?</p>\r\n<p>&nbsp;</p>\r\n<p>Some of the lexicon videos are recorded with the actor wearing a black &quot;bib&quot;, some are recorded with the bib on his lap, some without the bib, and some with a different color shirt.</p>\r\n<p>&nbsp;</p>\r\n<p>An algorithm that attempts to use the color videos to identify the gestures will need to allow for this - the actor may be wearing different clothing from the lexicon videos. (I asked about this in the forums, and was told that dealing with actors who change\r\n clothing is part of the competition.)</p>\r\n<p>&nbsp;</p>\r\n<p>As you can see, attempting to locate (for example) the actor's chest using color correlation will not work well.</p>\r\n<p>&nbsp;</p>\r\n<p><strong>Observation:</strong> One of the videos is broken</p>\r\n<p>&nbsp;</p>\r\n<p>valid01/K_24.avi</p>",
  "messages": [
    {
      "id": "9739",
      "postDate": "03/26/2012 03:16:04",
      "content": "<p>Apologies for starting a new thread, I can't seem to attach images to responses.</p>\r\n<p>&nbsp;</p>\r\n<p><strong>Observation:</strong> The depth image is apparently offset and bigger than the color image</p>\r\n<p>Posted below is an image which overlays the Kinect and color data (from devel03). Notice that the Kinect data is both offset to the left and bigger than the color data. That is to say, the Kinect data does not appear to be offset *above* the color image,\r\n it's simply bigger than the color image. (The red is an artifact of some processing I was doing - identifying pixels of a particular depth.)</p>\r\n<p>&nbsp;</p>\r\n<p>Any algorithm that attempts to correlate motion between the two frames will need to take this into account.</p>\r\n<p>&nbsp;</p>\r\n<p><strong>Observation:</strong> The color stream is of marginal utility</p>\r\n<p>&nbsp;</p>\r\n<p>I've also uploaded 3 selected images from the videos of the lexicon of devel03. Notice anything unusual?</p>\r\n<p>&nbsp;</p>\r\n<p>Some of the lexicon videos are recorded with the actor wearing a black &quot;bib&quot;, some are recorded with the bib on his lap, some without the bib, and some with a different color shirt.</p>\r\n<p>&nbsp;</p>\r\n<p>An algorithm that attempts to use the color videos to identify the gestures will need to allow for this - the actor may be wearing different clothing from the lexicon videos. (I asked about this in the forums, and was told that dealing with actors who change\r\n clothing is part of the competition.)</p>\r\n<p>&nbsp;</p>\r\n<p>As you can see, attempting to locate (for example) the actor's chest using color correlation will not work well.</p>\r\n<p>&nbsp;</p>\r\n<p><strong>Observation:</strong> One of the videos is broken</p>\r\n<p>&nbsp;</p>\r\n<p>valid01/K_24.avi</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "9740",
      "postDate": "03/26/2012 03:21:50",
      "content": "<p>Bah! I <em>cannot</em> seem to get images to load correctly. You'll just have to believe my text descriptions.</p>\r\n<p>&nbsp;</p>\r\n<p>I have some data plots which might be useful - correlations between action segments within videos - but without the ability to upload the images there would be no point.</p>\r\n<p>&nbsp;</p>\r\n<p>Ah well.</p>\r\n<p>Hmmm... maybe this will work</p>\r\n<p><img src=\"http://www.kaggle.com/files/2048/OverlayDevel03.jpg\" alt=\"Color/Depth overlay\"></p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "9741",
      "postDate": "03/26/2012 03:27:06",
      "content": "<p>Okay, I've figured out how to upload images. Here are the three files mentioned above.</p>\r\n<p>&nbsp;</p>\r\n<p><img src=\"http://www.kaggle.com/files/2046/M_1.0001.bmp\" alt=\"\"></p>\r\n<p><img src=\"http://www.kaggle.com/files/2047/M_5.0001.bmp\" alt=\"\"></p>\r\n<p><img src=\"http://www.kaggle.com/files/2045/M_9.0001.bmp\" alt=\"\"></p>\r\n<p>Wow! Entering with images on this site takes a lot of effort!</p>",
      "rawMarkdown": "",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 9740,
      "author_name": "rajstennajbarrabas",
      "author_url": "",
      "post_date": "03/26/2012 03:21:50",
      "content": "<p>Bah! I <em>cannot</em> seem to get images to load correctly. You'll just have to believe my text descriptions.</p>\r\n<p>&nbsp;</p>\r\n<p>I have some data plots which might be useful - correlations between action segments within videos - but without the ability to upload the images there would be no point.</p>\r\n<p>&nbsp;</p>\r\n<p>Ah well.</p>\r\n<p>Hmmm... maybe this will work</p>\r\n<p><img src=\"http://www.kaggle.com/files/2048/OverlayDevel03.jpg\" alt=\"Color/Depth overlay\"></p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 9741,
      "author_name": "rajstennajbarrabas",
      "author_url": "",
      "post_date": "03/26/2012 03:27:06",
      "content": "<p>Okay, I've figured out how to upload images. Here are the three files mentioned above.</p>\r\n<p>&nbsp;</p>\r\n<p><img src=\"http://www.kaggle.com/files/2046/M_1.0001.bmp\" alt=\"\"></p>\r\n<p><img src=\"http://www.kaggle.com/files/2047/M_5.0001.bmp\" alt=\"\"></p>\r\n<p><img src=\"http://www.kaggle.com/files/2045/M_9.0001.bmp\" alt=\"\"></p>\r\n<p>Wow! Entering with images on this site takes a lot of effort!</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "9739": "",
    "9740": "",
    "9741": ""
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}