本文整理汇总了C++中Forest::GetWeights方法的典型用法代码示例。如果您正苦于以下问题：C++ Forest::GetWeights方法的具体用法？C++ Forest::GetWeights怎么用？C++ Forest::GetWeights使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Forest的用法示例。
在下文中一共展示了Forest::GetWeights方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: total_energy
inline double total_energy()
{
double energy = 0.0;
double *Dp = D;
for ( int m=0; m<M; m++ ) {
energy += norm2( Dp, LabelSet::classes );
Dp += LabelSet::classes;
}
double t0[LabelSet::classes];
for ( int l=0; l<L; l++ ) {
auto& _to_j = forest->GetWeights( l );
for ( auto& ele : _to_j ) {
int j = ele.first;
if ( j<l ) {
double wt = static_cast<double>( ele.second );
minus( q + l * LabelSet::classes, q + j * LabelSet::classes, t0, LabelSet::classes );
energy += options.beta * wt * norm2( t0, LabelSet::classes );
}
}
}
return energy;
}示例2: restrict_energy
/*
* Restricted Energy on q(l) is
* sum_m ( D(m) - alpha(l,m) * q(l) + alpha(l,m) * q'(l) )^2
* + sum_j w(i,j) * ( q'(l) - q(j) )^2
*/
inline double restrict_energy( int l, double *q_l = nullptr )
{
auto& _to_m = m_to_l->getFromSet( l );
auto& _to_j = forest->GetWeights( l );
double energy = 0.0;
double t0[LabelSet::classes];
if ( nullptr == q_l ) {
for ( auto& ele : _to_m ) {
int m = ele.first;
energy += norm2( D + m * LabelSet::classes, LabelSet::classes );
}
for ( auto& ele : _to_j ) {
int j = ele.first;
double wt = static_cast<double>( ele.second );
minus( q + l * LabelSet::classes, q + j * LabelSet::classes, t0, LabelSet::classes );
energy += options.beta * wt * norm2( t0, LabelSet::classes );
}
} else {
double t0[LabelSet::classes];
for ( auto& ele : _to_m ) {
int m = ele.first;
double alpha = ele.second;
memcpy( t0, D + m * LabelSet::classes, sizeof(double) * LabelSet::classes );
minusScaledFrom( t0, q + l * LabelSet::classes, LabelSet::classes, alpha );
addScaledTo( t0, q_l, LabelSet::classes, alpha );
energy += norm2( t0, LabelSet::classes );
}
for ( auto& ele : _to_j ) {
int j = ele.first;
double wt = static_cast<double>( ele.second );
minus( q_l, q + j * LabelSet::classes, t0, LabelSet::classes );
energy += options.beta * wt * norm2( t0, LabelSet::classes );
}
}
return energy;
}示例3: update_q
inline void update_q( int l )
{
auto& _to_m = m_to_l->getFromSet( l );
auto& _to_j = forest->GetWeights( l );
double t0[LabelSet::classes];
memset( t0, 0, sizeof(double) * LabelSet::classes );
double t1[LabelSet::classes];
// t0 = sum_m alpha(l,m) * D(m)
for ( auto& ele : _to_m ) {
int m = ele.first;
double alpha = ele.second;
addScaledTo( t0, D + m * LabelSet::classes, LabelSet::classes, alpha );
}
// t0 += sum_m wt(l,j) (q(l) - q(j) )
for ( auto& ele : _to_j ) {
int j = ele.first;
double wt = static_cast<double>( ele.second );
minus( q + l * LabelSet::classes, q + j * LabelSet::classes, t1, LabelSet::classes );
addScaledTo( t0, t1, LabelSet::classes, wt );
}
// negate t0 to get negative gradient direction
negate( t0, LabelSet::classes );
// Line Search
double energy_old = restrict_energy( l ) * options.wolf;
bool updated = false;
normalize_vec( t0, t0, LabelSet::classes );
double energy_new = 0.0;
for ( int i=0; i<40; i++ ) {
scale( t0, LabelSet::classes, options.shrinkRatio );
add( t0, q + l * LabelSet::classes, t1, LabelSet::classes );
// Simplex Projection
watershed( t1, t0, LabelSet::classes );
energy_new = restrict_energy( l, t0 );
if ( energy_new < energy_old ) {
updated = true;
break;
}
}
if ( updated ) {
for ( auto& ele : _to_m ) {
int m = ele.first;
double alpha = ele.second;
update_D( m, l, t0, alpha );
}
memcpy( q + l * LabelSet::classes, t0, sizeof(double) * LabelSet::classes );
}
}