Function getReferenceViewId

src/software/utils/main_sfmTransform.cpp:238–282

}  // namespace

IndexT getReferenceViewId(const sfmData::SfMData& sfmData, const std::string& transform)
{
    IndexT refViewId;
    try
    {
        refViewId = sfm::getViewIdFromExpression(sfmData, transform);
        if (!sfmData.isPoseAndIntrinsicDefined(refViewId))
        {
            return UndefinedIndexT;
        }
    }
    catch (...)
    {
        refViewId = UndefinedIndexT;
    }

    // Default to select the view given timestamp
    if (refViewId == UndefinedIndexT)
    {
        // Sort views with poses per timestamps
        std::vector<std::pair<int64_t, IndexT>> sorted_views;
        for (auto v : sfmData.getViews())
        {
            if (!sfmData.isPoseAndIntrinsicDefined(v.first))
            {
                continue;
            }

            int64_t t = v.second->getImage().getMetadataDateTimestamp();
            sorted_views.push_back(std::make_pair(t, v.first));
        }
        std::sort(sorted_views.begin(), sorted_views.end());

        if (sorted_views.size() == 0)
        {
            return UndefinedIndexT;
        }

        // Get the view which was taken at the middle of the sequence
        int median = sorted_views.size() / 2;
        refViewId = sorted_views[sorted_views.size() - 1].second;
    }

    return refViewId;
}

bool getPoseFromJson(const std::string & lineUpFilename, Eigen::Matrix4d & T, IndexT & frameId)
{