Tracker::Tracker(int nb_time_steps, int nb_locations) {
_nb_locations = nb_locations;
_nb_time_steps = nb_time_steps;
- _detection_score = allocate_array<scalar_t>(_nb_time_steps, _nb_locations);
- _allowed_motion = allocate_array<int>(_nb_locations, _nb_locations);
- _entrances = new int[_nb_locations];
- _exits = new int[_nb_locations];
+
+ detection_scores = allocate_array<scalar_t>(_nb_time_steps, _nb_locations);
+ allowed_motion = allocate_array<int>(_nb_locations, _nb_locations);
+
+ entrances = new int[_nb_locations];
+ exits = new int[_nb_locations];
for(int l = 0; l < nb_locations; l++) {
- _entrances[l] = 0;
- _exits[l] = 0;
+ entrances[l] = 0;
+ exits[l] = 0;
for(int m = 0; m < nb_locations; m++) {
- _allowed_motion[l][m] = 0;
+ allowed_motion[l][m] = 0;
+ }
+ }
+
+ for(int t = 0; t < _nb_time_steps; t++) {
+ for(int l = 0; l < _nb_locations; l++) {
+ detection_scores[t][l] = 0.0;
}
}
Tracker::~Tracker() {
delete[] _edge_lengths;
delete _graph;
- deallocate_array<scalar_t>(_detection_score);
- deallocate_array<int>(_allowed_motion);
- delete[] _exits;
- delete[] _entrances;
+ deallocate_array<scalar_t>(detection_scores);
+ deallocate_array<int>(allowed_motion);
+ delete[] exits;
+ delete[] entrances;
}
-void Tracker::set_allowed_motion(int from_location, int to_location, int v) {
- _allowed_motion[from_location][to_location] = v;
+int Tracker::early_pair_node(int t, int l) {
+ return 1 + (2 * (t + 0) + 0) * _nb_locations + l;
}
-void Tracker::set_as_entrance(int location, int v) {
- _entrances[location] = v;
-}
-
-void Tracker::set_as_exit(int location, int v) {
- _exits[location] = v;
-}
-
-void Tracker::set_detection_score(int time, int location, scalar_t score) {
- _detection_score[time][location] = score;
+int Tracker::late_pair_node(int t, int l) {
+ return 1 + (2 * (t + 0) + 1) * _nb_locations + l;
}
void Tracker::build_graph() {
- // Delete existing graph
+ // Delete the existing graph if there was one
delete[] _edge_lengths;
delete _graph;
int nb_motions = 0, nb_exits = 0, nb_entrances = 0;
+
for(int l = 0; l < _nb_locations; l++) {
- if(_exits[l]) nb_exits++;
- if(_entrances[l]) nb_entrances++;
+ if(exits[l]) nb_exits++;
+ if(entrances[l]) nb_entrances++;
for(int m = 0; m < _nb_locations; m++) {
- if(_allowed_motion[l][m]) nb_motions++;
+ if(allowed_motion[l][m]) nb_motions++;
}
}
int nb_vertices = 2 + 2 * _nb_time_steps * _nb_locations;
int nb_edges =
+ // The edges from the source to the first frame, and from the last
+ // frame to the sink
_nb_locations * 2 +
- (_nb_time_steps - 2) * (nb_exits + nb_entrances) +
+ // The edges from the source to the entrances and from the exists
+ // to the sink (in every time frames but the first for the
+ // entrances, and last for the exits)
+ (_nb_time_steps - 1) * (nb_exits + nb_entrances) +
+ // The edges for the motions, between every successive frames
(_nb_time_steps - 1) * nb_motions +
+ // The edges inside the duplicated nodes
_nb_locations * _nb_time_steps;
- int source = 0, sink = nb_vertices - 1;
int *node_from = new int[nb_edges];
int *node_to = new int[nb_edges];
+
+ int source = 0, sink = nb_vertices - 1;
int e = 0;
_edge_lengths = new scalar_t[nb_edges];
// We put the in-node edges first, since these are the ones whose
- // lengths we will have to change according to the detection score
+ // lengths we will have to change before tracking, according to the
+ // detection scores
for(int t = 0; t < _nb_time_steps; t++) {
for(int l = 0; l < _nb_locations; l++) {
- node_from[e] = 1 + (2 * (t + 0) + 0) * _nb_locations + l;
- node_to[e] = 1 + (2 * (t + 0) + 1) * _nb_locations + l;
+ node_from[e] = early_pair_node(t, l);
+ node_to[e] = late_pair_node(t, l);
e++;
}
}
- // We put the other edges after
for(int l = 0; l < _nb_locations; l++) {
node_from[e] = source;
node_to[e] = 1 + l + 0 * _nb_locations;
for(int t = 0; t < _nb_time_steps; t++) {
for(int l = 0; l < _nb_locations; l++) {
if(t == _nb_time_steps - 1) {
- node_from[e] = 1 + (2 * (t + 0) + 1) * _nb_locations + l;
+ node_from[e] = late_pair_node(t, l);
node_to[e] = sink;
_edge_lengths[e] = 0.0;
e++;
} else {
for(int k = 0; k < _nb_locations; k++) {
- if(_allowed_motion[l][k]) {
- node_from[e] = 1 + (2 * (t + 0) + 1) * _nb_locations + l;
- node_to[e] = 1 + (2 * (t + 1) + 0) * _nb_locations + k;
+ if(allowed_motion[l][k]) {
+ node_from[e] = late_pair_node(t, l);
+ node_to[e] = early_pair_node(t+1, k);
_edge_lengths[e] = 0.0;
e++;
}
}
}
- for(int t = 1; t < _nb_time_steps-1; t++) {
+ for(int t = 0; t < _nb_time_steps; t++) {
for(int l = 0; l < _nb_locations; l++) {
- if(_entrances[l]) {
+ if(t > 0 && entrances[l]) {
node_from[e] = source;
- node_to[e] = 1 + (2 * (t + 0) + 0) * _nb_locations + l;
+ node_to[e] = early_pair_node(t, l);
_edge_lengths[e] = 0.0;
e++;
}
- if(_exits[l]) {
- node_from[e] = 1 + (2 * (t + 0) + 1) * _nb_locations + l;
+ if(t < _nb_time_steps - 1 && exits[l]) {
+ node_from[e] = late_pair_node(t, l);
node_to[e] = sink;
_edge_lengths[e] = 0.0;
e++;
delete[] node_to;
}
-void Tracker::print_dot_graph(ostream *os) {
+void Tracker::print_graph_dot(ostream *os) {
+ int e = 0;
+ for(int t = 0; t < _nb_time_steps; t++) {
+ for(int l = 0; l < _nb_locations; l++) {
+ _edge_lengths[e++] = - detection_scores[t][l];
+ }
+ }
_graph->print_dot(os);
}
int e = 0;
for(int t = 0; t < _nb_time_steps; t++) {
for(int l = 0; l < _nb_locations; l++) {
- _edge_lengths[e++] = - _detection_score[t][l];
+ _edge_lengths[e++] = - detection_scores[t][l];
}
}
#ifdef VERBOSE
for(int p = 0; p < _graph->nb_paths; p++) {
Path *path = _graph->paths[p];
- cout << "PATH " << p << " [length " << path->length << "] " << path->nodes[0];
- for(int n = 1; n < path->length; n++) {
+ cout << "PATH " << p << " [length " << path->nb_nodes << "] " << path->nodes[0];
+ for(int n = 1; n < path->nb_nodes; n++) {
cout << " -> " << path->nodes[n];
}
cout << endl;
return _graph->nb_paths;
}
+scalar_t Tracker::trajectory_score(int k) {
+ return -_graph->paths[k]->length;
+}
+
+int Tracker::trajectory_entrance_time(int k) {
+ return (_graph->paths[k]->nodes[1] - 1) / (2 * _nb_locations);
+}
+
int Tracker::trajectory_duration(int k) {
- return (_graph->paths[k]->length - 2) / 2;
+ return (_graph->paths[k]->nb_nodes - 2) / 2;
}
-int Tracker::trajectory_location(int k, int time) {
- return (_graph->paths[k]->nodes[2 * time + 1] - 1) % _nb_locations;
+int Tracker::trajectory_location(int k, int time_from_entry) {
+ return (_graph->paths[k]->nodes[2 * time_from_entry + 1] - 1) % _nb_locations;
}
projects / mtp.git / blobdiff