text: // Copyright (c) 2018, ETH Zurich and UNC Chapel Hill.
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //
  //     * 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.
  //
  //     * Neither the name of ETH Zurich and UNC Chapel Hill 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 HOLDERS 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.
  //
  // Author: Johannes L. Schoenberger (jsch at inf.ethz.ch)
  
  #ifndef COLMAP_SRC_MVS_NORMAL_MAP_H_
  #define COLMAP_SRC_MVS_NORMAL_MAP_H_
  
  #include <string>
  #include <vector>
  
  #include "mvs/mat.h"
  #include "util/bitmap.h"
  
  namespace colmap {
  namespace mvs {
  
  // Normal map class that stores per-pixel normals as a MxNx3 image.
  class NormalMap : public Mat<float> {
   public:
    NormalMap();
    NormalMap(const size_t width, const size_t height);
    explicit NormalMap(const Mat<float>& mat);
  
    void Rescale(const float factor);
    void Downsize(const size_t max_width, const size_t max_height);
  
    Bitmap ToBitmap() const;
  };
  
  }  // namespace mvs
  }  // namespace colmap
  
  #endif  // COLMAP_SRC_MVS_NORMAL_MAP_H_
  