sweeneychris's profile - activity

I had the same issue. This is because OpenCV tries to open the video file as an xml file and crashes. I modified my readStringList function with a try-catch and it works for me:

static bool readStringList(const string& filename, vector<string>& l) {
    l.clear();
    FileStorage fs;
    try {
      fs.open(filename, FileStorage::READ);
    } catch (...) {
      return false;
    }
    if (!fs.isOpened()) return false;
    FileNode n = fs.getFirstTopLevelNode();
    if (n.type() != FileNode::SEQ) return false;
    FileNodeIterator it = n.begin(), it_end = n.end();
    for (; it != it_end; ++it) l.push_back((string)*it);
    return true;
  }

You can treat each superpixel segment as a polygon and then decimate the polygon with Douglas Peucker, but this does not enforce that the boundaries between each polygon are consistent. So using findCountours will not work in my case.

I am thinking that tracing boundaries explicitly may be the only way. I'm hoping for a faster solution though.

I have a pixel segmentation created from a superpixel algorithm such as this. So for each pixel I have a label for which "superpixel" (i.e. group) it belongs to. I would like to convert the boundaries between superpixels into polylines instead of pixels so that they may be simplified with the Douglas-Peucker algorithm.

My problem is that I cannot figure out how to go from the superpixel labels to polylines. It is trivial to draw the superpixel boundaries (see attached image) but I am having trouble understanding how to convert those boundaries to polylines. Any suggestions would be really appreciated!