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+
+///////////////////////////////////////////////////////////////////////////
+// This program is free software: you can redistribute it and/or modify  //
+// it under the terms of the version 3 of the GNU General Public License //
+// as published by the Free Software Foundation.                         //
+//                                                                       //
+// 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, see <http://www.gnu.org/licenses/>.  //
+//                                                                       //
+// Written by Francois Fleuret, (C) IDIAP                                //
+// Contact <francois.fleuret@idiap.ch> for comments & bug reports        //
+///////////////////////////////////////////////////////////////////////////
+
+// A simple color image class
+
+#ifndef RGB_IMAGE_SUBPIXEL_H
+#define RGB_IMAGE_SUBPIXEL_H
+
+#include "misc.h"
+#include "rgb_image.h"
+
+class RGBImageSubpixel : public RGBImage {
+  static const int _scale = 8;
+public:
+
+  RGBImageSubpixel(int width, int height);
+  RGBImageSubpixel(RGBImage *image);
+  virtual ~RGBImageSubpixel();
+
+  inline int width() const { return _width / _scale; }
+  inline int height() const { return _height / _scale; }
+
+  virtual void read_ppm(const char *filename);
+  virtual void write_ppm(const char *filename);
+
+  virtual void read_png(const char *filename);
+  virtual void write_png(const char *filename);
+
+  virtual void read_jpg(const char *filename);
+  virtual void write_jpg(const char *filename, int quality);
+
+  virtual void draw_line(int thickness,
+                         unsigned char r, unsigned char g, unsigned char b,
+                         scalar_t x0, scalar_t y0, scalar_t x1, scalar_t y1);
+};
+
+#endif