GCoptimization::EnergyType Expansion::start_expansion(int max_num_iterations )
{
int curr_cycle = 1;
EnergyType new_energy,old_energy;
new_energy = dataEnergy()+smoothnessEnergy();
//old_energy = new_energy+1; // this doesn't work for large float energies
old_energy = -1;
std::cerr<<"starting expansion iteration"<<std::endl;
while ( old_energy < 0 || (old_energy > new_energy && curr_cycle <= max_num_iterations))
{
old_energy = new_energy;
new_energy = oneExpansionIteration();
std::cerr<<old_energy<<"->"<<new_energy<<std::endl;
curr_cycle++;
}
//printf(" Exp energy %d",new_energy);
return(new_energy);
}
GCoptimization::EnergyType Swap::alpha_beta_swap(LabelType alpha_label, LabelType beta_label)
{
terminateOnError( alpha_label < 0 || alpha_label >= m_nLabels || beta_label < 0 || beta_label >= m_nLabels,
"Illegal Label to Expand On");
perform_alpha_beta_swap(alpha_label,beta_label);
return(dataEnergy()+smoothnessEnergy());
}
GCoptimization::EnergyType Expansion::alpha_expansion(LabelType label)
{
terminateOnError( label < 0 || label >= m_nLabels,"Illegal Label to Expand On");
perform_alpha_expansion(label);
return(dataEnergy()+smoothnessEnergy());
}
GCoptimization::EnergyType Swap::oneSwapIteration()
{
int next,next1;
if (m_random_label_order) scramble_label_table();
for (next = 0; next < m_nLabels; next++ )
for (next1 = m_nLabels - 1; next1 >= 0; next1-- )
if ( m_labelTable[next] < m_labelTable[next1] )
{
perform_alpha_beta_swap(m_labelTable[next],m_labelTable[next1]);
}
return(dataEnergy()+smoothnessEnergy());
}
GCoptimization::EnergyType Expansion::oneExpansionIteration()
{
int next;
terminateOnError( m_dataType == NONE,"You have to set up the data cost before running optimization");
terminateOnError( m_smoothType == NONE,"You have to set up the smoothness cost before running optimization");
if (m_random_label_order) scramble_label_table();
for (next = 0; next < m_nLabels; next++ )
perform_alpha_expansion(m_labelTable[next]);
return(dataEnergy()+smoothnessEnergy());
}
GCoptimization::EnergyType Swap::start_swap(int max_num_iterations )
{
int curr_cycle = 1;
EnergyType new_energy,old_energy;
new_energy = dataEnergy()+smoothnessEnergy();
//old_energy = new_energy+1; // this doesn't work for large float energies
old_energy = -1;
while (old_energy < 0 || (old_energy > new_energy && curr_cycle <= max_num_iterations))
{
old_energy = new_energy;
new_energy = oneSwapIteration();
curr_cycle++;
}
//printf(" swap energy %d",new_energy);
return(new_energy);
}
