cxflann.h
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上传日期:2022-07-03
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波变换
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Visual C++
- /*M///////////////////////////////////////////////////////////////////////////////////////
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- // For Open Source Computer Vision Library
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- //M*/
- #ifndef CXFLANN_H_
- #define CXFLANN_H_
- #ifdef __cplusplus
- namespace flann
- {
- class Index;
- }
- namespace cv {
- namespace flann {
- /* Nearest neighbor index algorithms */
- enum flann_algorithm_t {
- LINEAR = 0,
- KDTREE = 1,
- KMEANS = 2,
- COMPOSITE = 3,
- SAVED = 254,
- AUTOTUNED = 255
- };
- enum flann_centers_init_t {
- CENTERS_RANDOM = 0,
- CENTERS_GONZALES = 1,
- CENTERS_KMEANSPP = 2
- };
- enum flann_log_level_t {
- LOG_NONE = 0,
- LOG_FATAL = 1,
- LOG_ERROR = 2,
- LOG_WARN = 3,
- LOG_INFO = 4
- };
- enum flann_distance_t {
- EUCLIDEAN = 1,
- MANHATTAN = 2,
- MINKOWSKI = 3
- };
- class CV_EXPORTS IndexFactory
- {
- public:
- virtual ~IndexFactory() {}
- virtual ::flann::Index* createIndex(const Mat& dataset) const = 0;
- };
- struct CV_EXPORTS IndexParams : public IndexFactory {
- protected:
- IndexParams() {};
- };
- struct CV_EXPORTS LinearIndexParams : public IndexParams {
- LinearIndexParams() {};
- ::flann::Index* createIndex(const Mat& dataset) const;
- };
- struct CV_EXPORTS KDTreeIndexParams : public IndexParams {
- KDTreeIndexParams(int trees_ = 4) : trees(trees_) {};
- int trees; // number of randomized trees to use (for kdtree)
- ::flann::Index* createIndex(const Mat& dataset) const;
- };
- struct CV_EXPORTS KMeansIndexParams : public IndexParams {
- KMeansIndexParams(int branching_ = 32, int iterations_ = 11,
- flann_centers_init_t centers_init_ = CENTERS_RANDOM, float cb_index_ = 0.2 ) :
- branching(branching_),
- iterations(iterations_),
- centers_init(centers_init_),
- cb_index(cb_index_) {};
- int branching; // branching factor (for kmeans tree)
- int iterations; // max iterations to perform in one kmeans clustering (kmeans tree)
- flann_centers_init_t centers_init; // algorithm used for picking the initial cluster centers for kmeans tree
- float cb_index; // cluster boundary index. Used when searching the kmeans tree
- ::flann::Index* createIndex(const Mat& dataset) const;
- };
- struct CV_EXPORTS CompositeIndexParams : public IndexParams {
- CompositeIndexParams(int trees_ = 4, int branching_ = 32, int iterations_ = 11,
- flann_centers_init_t centers_init_ = CENTERS_RANDOM, float cb_index_ = 0.2 ) :
- trees(trees_),
- branching(branching_),
- iterations(iterations_),
- centers_init(centers_init_),
- cb_index(cb_index_) {};
- int trees; // number of randomized trees to use (for kdtree)
- int branching; // branching factor (for kmeans tree)
- int iterations; // max iterations to perform in one kmeans clustering (kmeans tree)
- flann_centers_init_t centers_init; // algorithm used for picking the initial cluster centers for kmeans tree
- float cb_index; // cluster boundary index. Used when searching the kmeans tree
- ::flann::Index* createIndex(const Mat& dataset) const;
- };
- struct CV_EXPORTS AutotunedIndexParams : public IndexParams {
- AutotunedIndexParams( float target_precision_ = 0.9, float build_weight_ = 0.01,
- float memory_weight_ = 0, float sample_fraction_ = 0.1) :
- target_precision(target_precision_),
- build_weight(build_weight_),
- memory_weight(memory_weight_),
- sample_fraction(sample_fraction_) {};
- float target_precision; // precision desired (used for autotuning, -1 otherwise)
- float build_weight; // build tree time weighting factor
- float memory_weight; // index memory weighting factor
- float sample_fraction; // what fraction of the dataset to use for autotuning
- ::flann::Index* createIndex(const Mat& dataset) const;
- };
- struct CV_EXPORTS SavedIndexParams : public IndexParams {
- SavedIndexParams() {}
- SavedIndexParams(std::string filename_) : filename(filename_) {}
- std::string filename; // filename of the stored index
- ::flann::Index* createIndex(const Mat& dataset) const;
- };
- struct CV_EXPORTS SearchParams {
- SearchParams(int checks_ = 32) :
- checks(checks_) {};
- int checks;
- };
- class CV_EXPORTS Index {
- ::flann::Index* nnIndex;
- public:
- Index(const Mat& features, const IndexParams& params);
- ~Index();
- void knnSearch(const vector<float>& queries, vector<int>& indices, vector<float>& dists, int knn, const SearchParams& params);
- void knnSearch(const Mat& queries, Mat& indices, Mat& dists, int knn, const SearchParams& params);
- int radiusSearch(const vector<float>& query, vector<int>& indices, vector<float>& dists, float radius, const SearchParams& params);
- int radiusSearch(const Mat& query, Mat& indices, Mat& dists, float radius, const SearchParams& params);
- void save(std::string filename);
- int veclen() const;
- int size() const;
- };
- CV_EXPORTS int hierarchicalClustering(const Mat& features, Mat& centers,
- const KMeansIndexParams& params);
- }
- }
- #endif // __cplusplus
- #endif /* CXFLANN_H_ */