Function LoadMatchFile

src/aliceVision/matching/io.cpp:29–81

namespace matching {

bool LoadMatchFile(PairwiseMatches& matches, const std::string& filepath)
{
    const std::string ext = fs::path(filepath).extension().string();

    if (!utils::exists(filepath))
        return false;

    if (ext == ".txt")
    {
        std::ifstream stream(filepath);
        if (!stream.is_open())
            return false;

        // Read from the text file
        // I J
        // nbDescType
        // descType matchesCount
        // idx idx
        // ...
        // descType matchesCount
        // idx idx
        // ...
        std::size_t I = 0;
        std::size_t J = 0;
        std::size_t nbDescType = 0;
        while (stream >> I >> J >> nbDescType)
        {
            for (std::size_t i = 0; i < nbDescType; ++i)
            {
                std::string descTypeStr;
                std::size_t nbMatches = 0;
                // Read descType and number of matches
                stream >> descTypeStr >> nbMatches;

                feature::EImageDescriberType descType = feature::EImageDescriberType_stringToEnum(descTypeStr);
                std::vector<IndMatch> matchesPerDesc(nbMatches);
                // Read all matches
                for (std::size_t i = 0; i < nbMatches; ++i)
                {
                    stream >> matchesPerDesc[i];
                }
                matches[std::make_pair(I, J)][descType] = std::move(matchesPerDesc);
            }
        }
        stream.close();
        return true;
    }
    else
    {
        ALICEVISION_LOG_WARNING("Unknown matching file format: " << ext);
    }
    return false;
}

void filterMatchesByViews(PairwiseMatches& matches, const std::set<IndexT>& viewsKeys)
{