X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=mtp.cc;h=e07a7386d163d2b12ddd677a454368f0ef924117;hb=15ad4100d5f4d7e3e15ea807c9bef8002fa9c177;hp=59e950a0da1ebd5d2564977de6f5fcb56c7de22d;hpb=3070f21d61377aff06255fa5cfe92d0111d70117;p=mtp.git

diff --git a/mtp.cc b/mtp.cc
index 59e950a..e07a738 100644
--- a/mtp.cc
+++ b/mtp.cc
@@ -18,13 +18,8 @@
 
 // Multi-Tracked Path
 
-// Takes the graph description file as input and produces a dot file.
-
-// EXAMPLE: ./mtp ./graph2.txt  | dot -T pdf -o- | xpdf -
-
 #include <iostream>
 #include <fstream>
-#include <stdlib.h>
 
 using namespace std;
 
@@ -32,8 +27,8 @@ using namespace std;
 
 //////////////////////////////////////////////////////////////////////
 
-scalar_t detection_score(int true_label) {
-  if((true_label > 0) == (drand48() < 0.9)) {
+scalar_t detection_score(int true_label, scalar_t flip_noise) {
+  if((true_label > 0) == (drand48() < flip_noise)) {
     return   1.0 + 0.2 * (drand48() - 0.5);
   } else {
     return - 1.0 + 0.2 * (drand48() - 0.5);
@@ -41,8 +36,8 @@ scalar_t detection_score(int true_label) {
 }
 
 int main(int argc, char **argv) {
-  int nb_locations = 5;
-  int nb_time_steps = 20;
+  int nb_locations = 6;
+  int nb_time_steps = 5;
   int motion_amplitude = 1;
 
   Tracker *tracker = new Tracker(nb_time_steps, nb_locations);
@@ -51,36 +46,38 @@ int main(int argc, char **argv) {
     for(int k = 0; k < nb_locations; k++) {
       tracker->set_allowed_motion(l, k, abs(l - k) <= motion_amplitude);
     }
-    tracker->set_as_exit(0, 1);
     tracker->set_as_entrance(0, 1);
+    tracker->set_as_exit(nb_locations - 1, 1);
   }
 
   tracker->build_graph();
 
-  for(int r = 0; r < 10; r++) {
-    cout << "* ROUND " << r << endl;
-
-    // We generate synthetic detection scores, all in the center
-    // location, with 10% false detection (FP or FN)
+  // We generate synthetic detection scores at location
+  // nb_locations/2, with 5% false detection (FP or FN)
 
-    for(int t = 0; t < nb_time_steps; t++) {
-      for(int l = 0; l < nb_locations; l++) {
-        tracker->set_detection_score(t, l, detection_score(-1));
-      }
-      tracker->set_detection_score(t, nb_locations/2, detection_score(1));
+  for(int t = 0; t < nb_time_steps; t++) {
+    for(int l = 0; l < nb_locations; l++) {
+      tracker->set_detection_score(t, l, detection_score(-1, 0.95));
     }
+    tracker->set_detection_score(t, nb_locations/2, detection_score(1, 0.95));
+  }
 
-    tracker->track();
+  tracker->track();
 
-    for(int t = 0; t < tracker->nb_trajectories(); t++) {
-      cout << "TRAJECTORY "
-           << t
-           << " [starting " << tracker->trajectory_entrance_time(t) << "]";
-      for(int u = 0; u < tracker->trajectory_duration(t); u++) {
-        cout << " " << tracker->trajectory_location(t, u);
-      }
-      cout << endl;
+  for(int t = 0; t < tracker->nb_trajectories(); t++) {
+    cout << "TRAJECTORY "
+         << t
+         << " [starting " << tracker->trajectory_entrance_time(t) << "]";
+    for(int u = 0; u < tracker->trajectory_duration(t); u++) {
+      cout << " " << tracker->trajectory_location(t, u);
     }
+    cout << endl;
+  }
+
+  {
+    ofstream dot("graph.dot");
+    tracker->print_graph_dot(&dot);
+    cout << "Wrote graph.dot." << endl;
   }
 
   delete tracker;