Transforms.h

/*
    Image Transforms
 
    Copyright (C) 2004-2025 Ruven Pillay.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program 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, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
 
 
#ifndef _TRANSFORMS_H
#define _TRANSFORMS_H
 
#include <vector>
#include "RawTile.h"
 
 
// Define round() function for older MSVC compilers
#if defined _MSC_VER && _MSC_VER<1900
inline double round(double r) { return (r > 0.0) ? floor(r + 0.5) : ceil(r - 0.5); }
#endif
 
 
enum interpolation { NEAREST, BILINEAR, CUBIC, LANCZOS2, LANCZOS3 };
enum cmap_type { HOT, COLD, JET, BLUE, GREEN, RED };
 
 
struct Transform {
 
 private:
 
 
  void LAB2sRGB( const float *in, float *out );
 
 
 
  void sRGB2LAB( const float *in, float *out );
 
 
 public:
 
  std::string getDescription() const { return "CPU processor"; };
 
 
 
  void normalize( RawTile& in, const std::vector<float>& max, const std::vector<float>& min );
 
 
 
  void cmap( RawTile& in, enum cmap_type cmap );
 
 
 
  void inv( RawTile& in );
 
 
 
  void shade( RawTile& in, int h_angle, int v_angle );
 
 
 
  void LAB2sRGB( RawTile& in );
 
 
 
  void sRGB2LAB( RawTile& in );
 
 
 
  void scale_to_8bit( RawTile& in );
 
 
 
  void contrast( RawTile& in, float c );
 
 
 
  void gamma( RawTile& in, float g );
 
 
 
  void log( RawTile& in );
 
 
 
  void interpolate_nearestneighbour( RawTile& in, unsigned int w, unsigned int h );
 
 
 
  void interpolate_bilinear( RawTile& in, unsigned int w, unsigned int h );
 
 
 
  void rotate( RawTile& in, float angle );
 
 
 
  void greyscale( RawTile& in );
 
 
 
  void twist( RawTile& in, const std::vector< std::vector<float> >& ctw );
 
 
 
  void flatten( RawTile& in, int bands );
 
 
 
  void flip( RawTile& in, int o );
 
 
 
  std::vector<unsigned int> histogram( RawTile& in, const std::vector<float>& max, const std::vector<float>& min );
 
 
 
  unsigned char threshold( std::vector<unsigned int>& histogram );
 
 
 
  void binary( RawTile& in, unsigned char threshold );
 
 
 
  void equalize( RawTile& in, std::vector<unsigned int>& histogram );
 
 
 
  void convolution( RawTile& in, const std::vector<float>& conv );
 
 
};
 
#endif