text: /*M///////////////////////////////////////////////////////////////////////////////////////
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  //  copy or use the software.
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  //
  //                           License Agreement
  //                For Open Source Computer Vision Library
  //
  // Copyright (C) 2013, OpenCV Foundation, all rights reserved.
  // Third party copyrights are property of their respective owners.
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  // Redistribution and use in source and binary forms, with or without modification,
  // are permitted provided that the following conditions are met:
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  //   * Redistribution's of source code must retain the above copyright notice,
  //     this list of conditions and the following disclaimer.
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  //     this list of conditions and the following disclaimer in the documentation
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  //     derived from this software without specific prior written permission.
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  //M*/
  
  #include "precomp.hpp"
  #include "opencv2/photo.hpp"
  
  #include "seamless_cloning.hpp"
  
  using namespace std;
  using namespace cv;
  
  static Mat checkMask(InputArray _mask, Size size)
  {
      Mat mask = _mask.getMat();
      Mat gray;
      if (mask.channels() > 1)
          cvtColor(mask, gray, COLOR_BGRA2GRAY);
      else
      {
          if (mask.empty())
              gray = Mat(size.height, size.width, CV_8UC1, Scalar(255));
          else
              mask.copyTo(gray);
      }
  
      return gray;
  }
  
  void cv::seamlessClone(InputArray _src, InputArray _dst, InputArray _mask, Point p, OutputArray _blend, int flags)
  {
      CV_INSTRUMENT_REGION();
      CV_Assert(!_src.empty());
  
      const Mat src  = _src.getMat();
      const Mat dest = _dst.getMat();
      Mat mask = checkMask(_mask, src.size());
      dest.copyTo(_blend);
      Mat blend = _blend.getMat();
  
      Mat mask_inner = mask(Rect(1, 1, mask.cols - 2, mask.rows - 2));
      copyMakeBorder(mask_inner, mask, 1, 1, 1, 1, BORDER_ISOLATED | BORDER_CONSTANT, Scalar(0));
  
      Rect roi_s = boundingRect(mask);
      if (roi_s.empty()) return;
      Rect roi_d(p.x - roi_s.width / 2, p.y - roi_s.height / 2, roi_s.width, roi_s.height);
  
      Mat destinationROI = dest(roi_d).clone();
  
      Mat sourceROI = Mat::zeros(roi_s.height, roi_s.width, src.type());
      src(roi_s).copyTo(sourceROI,mask(roi_s));
  
      Mat maskROI = mask(roi_s);
      Mat recoveredROI = blend(roi_d);
  
      Cloning obj;
      obj.normalClone(destinationROI,sourceROI,maskROI,recoveredROI,flags);
  }
  
  void cv::colorChange(InputArray _src, InputArray _mask, OutputArray _dst, float red, float green, float blue)
  {
      CV_INSTRUMENT_REGION();
  
      Mat src  = _src.getMat();
      Mat mask = checkMask(_mask, src.size());
      _dst.create(src.size(), src.type());
      Mat blend = _dst.getMat();
  
      Mat cs_mask = Mat::zeros(src.size(), src.type());
      src.copyTo(cs_mask, mask);
  
      Cloning obj;
      obj.localColorChange(src, cs_mask, mask, blend, red, green, blue);
  }
  
  void cv::illuminationChange(InputArray _src, InputArray _mask, OutputArray _dst, float alpha, float beta)
  {
      CV_INSTRUMENT_REGION();
  
      Mat src  = _src.getMat();
      Mat mask = checkMask(_mask, src.size());
      _dst.create(src.size(), src.type());
      Mat blend = _dst.getMat();
  
      Mat cs_mask = Mat::zeros(src.size(), src.type());
      src.copyTo(cs_mask, mask);
  
      Cloning obj;
      obj.illuminationChange(src, cs_mask, mask, blend, alpha, beta);
  
  }
  
  void cv::textureFlattening(InputArray _src, InputArray _mask, OutputArray _dst,
                             float low_threshold, float high_threshold, int kernel_size)
  {
      CV_INSTRUMENT_REGION();
  
      Mat src  = _src.getMat();
      Mat mask = checkMask(_mask, src.size());
      _dst.create(src.size(), src.type());
      Mat blend = _dst.getMat();
  
      Mat cs_mask = Mat::zeros(src.size(), src.type());
      src.copyTo(cs_mask, mask);
  
      Cloning obj;
      obj.textureFlatten(src, cs_mask, mask, low_threshold, high_threshold, kernel_size, blend);
  }
  