opencv_eigen.h

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/*
 * This file is part of ArmarX.
 *
 * ArmarX is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * ArmarX is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * @author     Fabian Reister ( fabian dot reister at kit dot edu )
 * @date       2021
 * @copyright  http://www.gnu.org/licenses/gpl-2.0.txt
 *             GNU General Public License
 */
 
#pragma once
 
#include <vector>
 
#include <Eigen/Core>
 
#include <opencv2/core/types.hpp>
 
namespace armarx::conversions
{
    inline cv::Point2f
    eigen2cv(const Eigen::Vector2f& pt)
    {
        return {pt.x(), pt.y()};
    }
 
    template <typename EigenT, typename CvT = decltype(eigen2cv(EigenT()))>
    auto
    eigen2cv(const std::vector<EigenT>& points)
    {
        std::vector<CvT> v;
        v.reserve(points.size());
 
        std::transform(points.begin(),
                       points.end(),
                       std::back_inserter(v),
                       static_cast<CvT (*)(const EigenT&)>(eigen2cv));
 
        return v;
    }
 
    inline Eigen::Vector2f
    cv2eigen(const cv::Point2f& pt)
    {
        return Eigen::Vector2f{pt.x, pt.y};
    }
 
} // namespace armarx::conversions