NNIndex<Distance>* load_saved_index(const Matrix<typename Distance::ElementType>& dataset, const std::string& filename, Distance distance)
{
typedef typename Distance::ElementType ElementType;
FILE* fin = fopen(filename.c_str(), "rb");
if (fin == NULL) {
return NULL;
}
IndexHeader header = load_header(fin);
if (header.data_type != flann_datatype<ElementType>::value) {
throw FLANNException("Datatype of saved index is different than of the one to be created.");
}
// We cannot make this check now, because the index and the dataset might be of different size
// some entries of the dataset might not be used in the index
/*
if ((size_t(header.rows) != dataset.rows)||(size_t(header.cols) != dataset.cols)) {
throw FLANNException("The index saved belongs to a different dataset");
}
*/
IndexParams params;
params["algorithm"] = header.index_type;
NNIndex<Distance>* nnIndex = create_index_by_type<Distance>(dataset, params, distance);
nnIndex->loadIndex(fin);
fclose(fin);
return nnIndex;
}
NNIndex<Distance>* load_saved_index(const Matrix<typename Distance::ElementType>& dataset, const cv::String& filename, Distance distance)
{
typedef typename Distance::ElementType ElementType;
FILE* fin = fopen(filename.c_str(), "rb");
if (fin == NULL) {
return NULL;
}
IndexHeader header = load_header(fin);
/*if (header.data_type != Datatype<ElementType>::type()) {
throw FLANNException("Datatype of saved index is different than of the one to be created.");
}
if ((size_t(header.rows) != dataset.rows)||(size_t(header.cols) != dataset.cols)) {
throw FLANNException("The index saved belongs to a different dataset");
}*/
IndexParams params;
params["algorithm"] = header.index_type;
NNIndex<Distance>* nnIndex = create_index_by_type<Distance>(dataset, params, distance);
nnIndex->loadIndex(fin);
fclose(fin);
return nnIndex;
}
