--- a/c/Parameters.cpp	Fri Jun 29 16:15:13 2012 -0400
+++ b/c/Parameters.cpp	Mon Jul 02 23:49:39 2012 -0400
@@ -9,7 +9,7 @@
 using namespace std;
 
 KLTFeatureTrackingParameters::KLTFeatureTrackingParameters(const int argc, char* argv[]) {
-  std::string configurationFilename;
+  string configurationFilename;
   po::options_description onlyCmdLine("Command line only");
   po::options_description cmdLineAndFile("Command line and configuration file");
 
@@ -33,8 +33,8 @@
     ("load-features", po::value<bool>(&loadFeatures), "load features from database")
     ("display", po::value<bool>(&display), "display trajectories on the video")
     ("video-fps", po::value<float>(&videoFPS), "original video frame rate")
-    ("frame1", po::value<int>(&frame1), "first frame to process")
-    ("nframes", po::value<int>(&nFrames), "number of frame to process")
+    ("frame1", po::value<unsigned int>(&frame1), "first frame to process")
+    ("nframes", po::value<unsigned int>(&nFrames), "number of frame to process")
     // feature tracking
     ("max-nfeatures", po::value<int>(&maxNFeatures), "maximum number of features added at each frame")
     ("feature-quality", po::value<float>(&featureQuality), "quality level of the good features to track")
@@ -95,7 +95,7 @@
 
 string KLTFeatureTrackingParameters::getParameterDescription(po::options_description& options, const po::variables_map& vm, const string& separator /* = " " */) const {
   stringstream stream;
-  std::vector<boost::shared_ptr<po::option_description> > optionsVec = options.options();
+  vector<boost::shared_ptr<po::option_description> > optionsVec = options.options();
   for (unsigned int i=0; i<optionsVec.size(); ++i) {
     boost::any value = vm[optionsVec[i]->long_name()].value();
     if (value.type() == typeid(bool))