double CrossEntropyCounts::operator() ( const dlib::matrix<double,0,1>& arg) const
{
double total = 0.0;
double n = 0.0;
std::vector<float> weight_vector (m_model->m_numModels);
for (int i=0; i < arg.nr(); i++) {
weight_vector[i] = arg(i);
}
if (m_model->m_mode == "interpolate") {
weight_vector = m_model->normalizeWeights(weight_vector);
}
for ( std::vector<multiModelCountsStatisticsOptimization*>::const_iterator iter = m_optimizerStats.begin(); iter != m_optimizerStats.end(); ++iter ) {
multiModelCountsStatisticsOptimization* statistics = *iter;
size_t f = statistics->f;
double score;
if (m_iFeature == 0) {
score = m_model->m_combineFunction(statistics->fst, statistics->ft, weight_vector);
} else if (m_iFeature == 1) {
score = m_model->ComputeWeightedLexicalTranslationFromCache(statistics->lexCachee2f, weight_vector);
} else if (m_iFeature == 2) {
score = m_model->m_combineFunction(statistics->fst, statistics->fs, weight_vector);
} else if (m_iFeature == 3) {
score = m_model->ComputeWeightedLexicalTranslationFromCache(statistics->lexCachef2e, weight_vector);
} else {
score = 0;
UTIL_THROW(util::Exception, "Trying to optimize feature that I don't know. Aborting");
}
total -= (FloorScore(TransformScore(score))/TransformScore(2))*f;
n += f;
}
return total/n;
}
static void
munkresCost(const dlib::matrix<double> &src, T scale, dlib::matrix<T> &dst /*out*/) {
ASSERT_require(dst.nr()==src.nr() && dst.nc()==src.nc());
std::pair<double, double> range = minmax(src);
if (range.first==range.second) {
for (long i=0; i<src.nr(); ++i) {
for (long j=0; j<dst.nc(); ++j)
dst(i, j) = 0;
}
} else {
for (long i=0; i<src.nr(); ++i) {
for (long j=0; j<dst.nc(); ++j)
dst(i, j) = round(((range.second-src(i, j)) / (range.second-range.first)) * scale);
}
}
}
double CrossEntropy::operator() ( const dlib::matrix<double,0,1>& arg) const
{
double total = 0.0;
double n = 0.0;
std::vector<float> weight_vector (m_model->m_numModels);
for (int i=0; i < arg.nr(); i++) {
weight_vector[i] = arg(i);
}
if (m_model->m_mode == "interpolate") {
weight_vector = m_model->normalizeWeights(weight_vector);
}
for ( std::vector<multiModelStatisticsOptimization*>::const_iterator iter = m_optimizerStats.begin(); iter != m_optimizerStats.end(); ++iter ) {
multiModelStatisticsOptimization* statistics = *iter;
size_t f = statistics->f;
double score;
score = std::inner_product(statistics->p[m_iFeature].begin(), statistics->p[m_iFeature].end(), weight_vector.begin(), 0.0);
total -= (FloorScore(TransformScore(score))/TransformScore(2))*f;
n += f;
}
return total/n;
}
static std::pair<T, T>
minmax(const dlib::matrix<T> &matrix) {
T maxValue = matrix(0, 0);
T minValue = matrix(0, 0);
for (long i=0; i<matrix.nr(); ++i) {
for (long j=0; j<matrix.nc(); ++j) {
maxValue = std::max(maxValue, matrix(i, j));
minValue = std::min(minValue, matrix(i, j));
}
}
return std::make_pair(minValue, maxValue);
}