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Diffstat (limited to 'geom_matching/wasserstein/include/diagram_reader.h')
| -rw-r--r-- | geom_matching/wasserstein/include/diagram_reader.h | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/geom_matching/wasserstein/include/diagram_reader.h b/geom_matching/wasserstein/include/diagram_reader.h new file mode 100644 index 0000000..8d09c9b --- /dev/null +++ b/geom_matching/wasserstein/include/diagram_reader.h @@ -0,0 +1,369 @@ +/* + +Copyright (c) 2015, M. Kerber, D. Morozov, A. Nigmetov +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: + +1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +You are under no obligation whatsoever to provide any bug fixes, patches, or +upgrades to the features, functionality or performance of the source code +(Enhancements) to anyone; however, if you choose to make your Enhancements +available either publicly, or directly to copyright holder, +without imposing a separate written license agreement for such Enhancements, +then you hereby grant the following license: a non-exclusive, royalty-free +perpetual license to install, use, modify, prepare derivative works, incorporate +into other computer software, distribute, and sublicense such enhancements or +derivative works thereof, in binary and source code form. + +*/ + +#ifndef HERA_DIAGRAM_READER_H +#define HERA_DIAGRAM_READER_H + +#ifndef FOR_R_TDA +#include <iostream> +#endif + +#include <iomanip> +#include <locale> +#include <sstream> +#include <fstream> +#include <string> +#include <cctype> +#include <algorithm> +#include <unordered_map> +#include <map> + +#ifdef WASSERSTEIN_PURE_GEOM +#include "dnn/geometry/euclidean-dynamic.h" +#endif + +namespace hera { + +// cannot choose stod, stof or stold based on RealType, +// lazy solution: partial specialization +template<class RealType = double> +RealType parse_real_from_str(const std::string& s); + +template <> +double parse_real_from_str<double>(const std::string& s) +{ + return std::stod(s); +} + + +template <> +long double parse_real_from_str<long double>(const std::string& s) +{ + return std::stold(s); +} + + +template <> +float parse_real_from_str<float>(const std::string& s) +{ + return std::stof(s); +} + + +template<class RealType> +RealType parse_real_from_str(const std::string& s) +{ + static_assert(sizeof(RealType) != sizeof(RealType), "Must be specialized for each type you want to use, see above"); +} + +// fill in result with points from file fname +// return false if file can't be opened +// or error occurred while reading +// decPrecision is the maximal decimal precision in the input, +// it is zero if all coordinates in the input are integers +template<class RealType = double, class ContType_ = std::vector<std::pair<RealType, RealType>>> +bool read_diagram_point_set(const char* fname, ContType_& result, int& decPrecision) +{ + size_t lineNumber { 0 }; + result.clear(); + std::ifstream f(fname); + if (!f.good()) { +#ifndef FOR_R_TDA + std::cerr << "Cannot open file " << fname << std::endl; +#endif + return false; + } + std::locale loc; + std::string line; + while(std::getline(f, line)) { + lineNumber++; + // process comments: remove everything after hash + auto hashPos = line.find_first_of("#", 0); + if( std::string::npos != hashPos) { + line = std::string(line.begin(), line.begin() + hashPos); + } + if (line.empty()) { + continue; + } + // trim whitespaces + auto whiteSpaceFront = std::find_if_not(line.begin(),line.end(),isspace); + auto whiteSpaceBack = std::find_if_not(line.rbegin(),line.rend(),isspace).base(); + if (whiteSpaceBack <= whiteSpaceFront) { + // line consists of spaces only - move to the next line + continue; + } + line = std::string(whiteSpaceFront,whiteSpaceBack); + + // transform line to lower case + // to parse Infinity + for(auto& c : line) { + c = std::tolower(c, loc); + } + + bool fracPart = false; + int currDecPrecision = 0; + for(auto c : line) { + if (c == '.') { + fracPart = true; + } else if (fracPart) { + if (isdigit(c)) { + currDecPrecision++; + } else { + fracPart = false; + if (currDecPrecision > decPrecision) + decPrecision = currDecPrecision; + currDecPrecision = 0; + } + } + } + + RealType x, y; + std::string str_x, str_y; + std::istringstream iss(line); + try { + iss >> str_x >> str_y; + + x = parse_real_from_str<RealType>(str_x); + y = parse_real_from_str<RealType>(str_y); + + result.push_back(std::make_pair(x, y)); + } + catch (const std::invalid_argument& e) { +#ifndef FOR_R_TDA + std::cerr << "Error in file " << fname << ", line number " << lineNumber << ": cannot parse \"" << line << "\"" << std::endl; +#endif + return false; + } + catch (const std::out_of_range&) { +#ifndef FOR_R_TDA + std::cerr << "Error while reading file " << fname << ", line number " << lineNumber << ": value too large in \"" << line << "\"" << std::endl; +#endif + return false; + } + } + f.close(); + return true; +} + + +// wrappers +template<class RealType = double, class ContType_ = std::vector<std::pair<RealType, RealType>>> +bool read_diagram_point_set(const std::string& fname, ContType_& result, int& decPrecision) +{ + return read_diagram_point_set<RealType, ContType_>(fname.c_str(), result, decPrecision); +} + +// these two functions are now just wrappers for the previous ones, +// in case someone needs them; decPrecision is ignored +template<class RealType = double, class ContType_ = std::vector<std::pair<RealType, RealType>>> +bool read_diagram_point_set(const char* fname, ContType_& result) +{ + int decPrecision; + return read_diagram_point_set<RealType, ContType_>(fname, result, decPrecision); +} + +template<class RealType = double, class ContType_ = std::vector<std::pair<RealType, RealType>>> +bool read_diagram_point_set(const std::string& fname, ContType_& result) +{ + int decPrecision; + return read_diagram_point_set<RealType, ContType_>(fname.c_str(), result, decPrecision); +} + + +template<class RealType, class ContType> +void remove_duplicates(ContType& dgm_A, ContType& dgm_B) +{ + std::map<std::pair<RealType, RealType>, int> map_A, map_B; + // copy points to maps + for(const auto& ptA : dgm_A) { + map_A[ptA]++; + } + for(const auto& ptB : dgm_B) { + map_B[ptB]++; + } + // clear vectors + dgm_A.clear(); + dgm_B.clear(); + // remove duplicates from maps + // loop over the smaller one + if (map_A.size() <= map_B.size()) { + for(auto& point_multiplicity_pair : map_A) { + auto iter_B = map_B.find(point_multiplicity_pair.first); + if (iter_B != map_B.end()) { + int duplicate_multiplicity = std::min(point_multiplicity_pair.second, iter_B->second); + point_multiplicity_pair.second -= duplicate_multiplicity; + iter_B->second -= duplicate_multiplicity; + } + } + } else { + for(auto& point_multiplicity_pair : map_B) { + auto iter_A = map_A.find(point_multiplicity_pair.first); + if (iter_A != map_A.end()) { + int duplicate_multiplicity = std::min(point_multiplicity_pair.second, iter_A->second); + point_multiplicity_pair.second -= duplicate_multiplicity; + iter_A->second -= duplicate_multiplicity; + } + } + } + // copy points back to vectors + for(const auto& pointMultiplicityPairA : map_A) { + assert( pointMultiplicityPairA.second >= 0); + for(int i = 0; i < pointMultiplicityPairA.second; ++i) { + dgm_A.push_back(pointMultiplicityPairA.first); + } + } + + for(const auto& pointMultiplicityPairB : map_B) { + assert( pointMultiplicityPairB.second >= 0); + for(int i = 0; i < pointMultiplicityPairB.second; ++i) { + dgm_B.push_back(pointMultiplicityPairB.first); + } + } +} + + +#ifdef WASSERSTEIN_PURE_GEOM + +template<class Real> +int get_point_dimension(const std::string& line) +{ + Real x; + int dim = 0; + std::istringstream iss(line); + while(iss >> x) { + dim++; + } + return dim; +} + + +template<class RealType = double > +bool read_point_cloud(const char* fname, hera::ws::dnn::DynamicPointVector<RealType>& result, int& dimension, int& decPrecision) +{ + using DynamicPointTraitsR = typename hera::ws::dnn::DynamicPointTraits<RealType>; + + size_t lineNumber { 0 }; + result.clear(); + std::ifstream f(fname); + if (!f.good()) { +#ifndef FOR_R_TDA + std::cerr << "Cannot open file " << fname << std::endl; +#endif + return false; + } + std::string line; + DynamicPointTraitsR traits; + bool dim_computed = false; + int point_idx = 0; + while(std::getline(f, line)) { + lineNumber++; + // process comments: remove everything after hash + auto hashPos = line.find_first_of("#", 0); + if( std::string::npos != hashPos) { + line = std::string(line.begin(), line.begin() + hashPos); + } + if (line.empty()) { + continue; + } + // trim whitespaces + auto whiteSpaceFront = std::find_if_not(line.begin(),line.end(),isspace); + auto whiteSpaceBack = std::find_if_not(line.rbegin(),line.rend(),isspace).base(); + if (whiteSpaceBack <= whiteSpaceFront) { + // line consists of spaces only - move to the next line + continue; + } + + line = std::string(whiteSpaceFront,whiteSpaceBack); + + if (not dim_computed) { + dimension = get_point_dimension<RealType>(line); + traits = hera::ws::dnn::DynamicPointTraits<RealType>(dimension); + result = traits.container(); + result.clear(); + dim_computed = true; + } + + bool fracPart = false; + int currDecPrecision = 0; + for(auto c : line) { + if (c == '.') { + fracPart = true; + } else if (fracPart) { + if (isdigit(c)) { + currDecPrecision++; + } else { + fracPart = false; + if (currDecPrecision > decPrecision) + decPrecision = currDecPrecision; + currDecPrecision = 0; + } + } + } + + result.resize(result.size() + 1); + RealType x; + std::istringstream iss(line); + for(int d = 0; d < dimension; ++d) { + if (not(iss >> x)) { +#ifndef FOR_R_TDA + std::cerr << "Error in file " << fname << ", line number " << lineNumber << ": cannot parse \"" << line << "\"" << std::endl; +#endif + return false; + } + result[point_idx][d] = x; + } + point_idx++; + } + f.close(); + return true; +} + +// wrappers +template<class RealType = double > +bool read_point_cloud(const char* fname, hera::ws::dnn::DynamicPointVector<RealType>& result, int& dimension) +{ + int dec_precision; + return read_point_cloud<RealType>(fname, result, dimension, dec_precision); +} + +template<class RealType = double > +bool read_point_cloud(std::string fname, hera::ws::dnn::DynamicPointVector<RealType>& result, int& dimension, int& dec_precision) +{ + return read_point_cloud<RealType>(fname.c_str(), result, dimension, dec_precision); +} + +template<class RealType = double > +bool read_point_cloud(std::string fname, hera::ws::dnn::DynamicPointVector<RealType>& result, int& dimension) +{ + return read_point_cloud<RealType>(fname.c_str(), result, dimension); +} + +#endif // WASSERSTEIN_PURE_GEOM + +} // end namespace hera +#endif // HERA_DIAGRAM_READER_H |