Es++ Sample: BilateralFilter


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 *  BilateralFilter.cpp
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//
//photo.hpp

/* void bilateralFilter(InputArray src, OutputArray dst, int diameter, 
                  double sigmaSpaceColor, 
                  double sigmaSpaceSpace, 
                  int borderType=BORDER_DEFAULT )
*/

#include <es++/gtkmm-3.0/Application.h>
#include <es++/gtkmm-3.0/Label.h>
#include <es++/gtkmm-3.0/LabeledTrackBar.h>
#include <es++/gtkmm-3.0/FileOpenDialog.h>
#include <es++/opencv-4.0/OpenCVMainView.h>
#include <es++/opencv-4.0/OpenCVScrolledImageView.h>
#include <es++/opencv-4.0/OpenCVScaleComboBox.h>

using namespace Gtk;

namespace Es {

class MainView :public Es::OpenCVMainView {
private:
  /////////////////////////////////////////////////////// 
  //Inner classes start.

  class OriginalImageView :public Es::OpenCVScrolledImageView {
  public:
    OriginalImageView()
    {
    }    
    void rescale(int scaling_ratio)
    {
      OpenCVScrolledImageView::scaleImage(scaling_ratio);
    }
  };

  class FilteredImageView :public Es::OpenCVScrolledImageView {
  private:
    cv::Mat filtered_image;

  public:
    FilteredImageView()
    {
    }

    void loadImage(const std::string& filename, 
        int imageLoadingFlag= CV_LOAD_IMAGE_COLOR,
                int scaling_ratio=100)
    {
      OpenCVScrolledImageView::loadImage(filename, imageLoadingFlag,
                                scaling_ratio);
 
      cv::Mat& original_image = getOriginalImage();
      filtered_image  = original_image.clone();
      scaleImage(filtered_image, scaling_ratio);
      
    }    

    void filter(int diameter, int sigmacolor, int sigmaspace, int scaling_ratio)
    {
      cv::Mat& original_image = getOriginalImage();

      try {
      //void bilateralFilter(InputArray src, OutputArray dst, int diameter, 
      //            double sigmaSpaceColor, 
      //            double sigmaSpaceSpace, 
      //            int borderType=BORDER_DEFAULT )
      
      cv::Mat newImage = cv::Mat::zeros(original_image.size(), original_image.type() );
      cv::bilateralFilter(original_image, newImage, diameter, 
            (double)sigmacolor, 
            (double)sigmaspace,
            BORDER_DEFAULT);

        filtered_image = newImage;
        scaleImage(filtered_image, scaling_ratio);

      } catch (cv::Exception& ex) {
        ; //Ignore
      }
    }

    void rescale(int scaling_ratio)
    {
      OpenCVScrolledImageView::scaleImage(filtered_image, scaling_ratio);
    }
  };
  // Inner classes end.
  /////////////////////////////////////////////////////// 

  Es::Label               filepath;

  Es::HorizontalLayout    horiz_layout;

  Es::VerticalLayout      control_pane;

  OriginalImageView       original_image;

  FilteredImageView       filtered_image;

  int                     loading_flag;

  Es::OpenCVScaleComboBox scale_combobox;

  Es::LabeledTrackBar     diameter_trackbar;
  int                     diameter;
 
  Es::LabeledTrackBar     sigmacolor_trackbar;
  int                     sigmacolor;

  Es::LabeledTrackBar     sigmaspace_trackbar;
  int                     sigmaspace;

  int                     scaling_ratio;  //Percentage.
  static const int        CONTROLPANE_WIDTH = 180;

  std::string             filename;
 
  Es::FileOpenDialog      file_dialog;

public:
  //////////////////////////////////////////////
  //Constructor
  //
  MainView(Es::Application& applet, 
          std::string&      name,
          Es::Args&         args)
  :OpenCVMainView(applet, name, args)
  ,scaling_ratio(100)  //100%
  ,file_dialog(*this, Es::FileOpenDialog::IMAGE_FILES)
  {
    int w = (int)args.get(XmNwidth);
    int h = (int)args.get(XmNheight);

    int ratio = (int)args.get(XmNscalingRatio);

    scaling_ratio = OpenCVImageView::validateScale(ratio);

    Es::MainLayout& main_layout = get_main_layout();

    main_layout.pack_start(filepath, FALSE, FALSE, 0);

    main_layout.pack_start(horiz_layout);

    filename = "../../images/flower.png";

    filepath.set_label(filename);
    int ww = (w - CONTROLPANE_WIDTH)/2;

    filepath.set_size_request(w, 30);
    original_image.set_size_request(ww, h);
    filtered_image.set_size_request(ww, h);
    control_pane.set_size_request( CONTROLPANE_WIDTH, h);

    horiz_layout.pack_start(original_image);
    horiz_layout.pack_start(filtered_image);

    horiz_layout.pack_start(control_pane, FALSE, FALSE, 0);

    scale_combobox.set_selection(scaling_ratio);

    diameter = 4;
    diameter_trackbar.set_label("Diameter: [0, 5]");
    diameter_trackbar.configure_adjuster((double)diameter, 0.0f, 5.0f);
    diameter_trackbar.set_value_changed_callback(
            sigc::mem_fun(*this, &MainView::diameter_value_changed) );


    sigmacolor = 160;
    sigmacolor_trackbar.set_label("SigmaColor: [0, 255]");
    sigmacolor_trackbar.configure_adjuster((double)sigmacolor, 0.0f, 255.0f);
    sigmacolor_trackbar.set_value_changed_callback(
            sigc::mem_fun(*this, &MainView::sigmacolor_value_changed) );

    sigmaspace = 40;
    sigmaspace_trackbar.set_label("SigmaSpace: [0, 255]");
    sigmaspace_trackbar.configure_adjuster((double)sigmaspace, 0.0f, 255.0f);
    sigmaspace_trackbar.set_value_changed_callback(
            sigc::mem_fun(*this, &MainView::sigmaspace_value_changed) );

    control_pane.set_spacing(20);
    control_pane.pack_start(scale_combobox, Gtk::PACK_SHRINK);
    control_pane.pack_start(diameter_trackbar, Gtk::PACK_SHRINK);
    control_pane.pack_start(sigmacolor_trackbar, Gtk::PACK_SHRINK);
    control_pane.pack_start(sigmaspace_trackbar, Gtk::PACK_SHRINK);

    scale_combobox.set_changed_callback(
             sigc::mem_fun(*this, &MainView::scale_changed) );

    loading_flag = IMREAD_COLOR;
    original_image.loadImage(filename, loading_flag, scaling_ratio);
    filtered_image.loadImage(filename, loading_flag, scaling_ratio);

    filtered_image.filter(diameter, sigmacolor, sigmaspace, scaling_ratio);

    show_all();
  }

  void scale_changed()
  {
    std::string scale = scale_combobox.get_active_text();
    printf("scale_changed %s\n", scale.c_str());
    scaling_ratio = scale_combobox.get_selection();

    original_image.rescale(scaling_ratio);
    filtered_image.rescale(scaling_ratio);
  }

  void diameter_value_changed()
  {
    diameter = (int)diameter_trackbar.get_value();
    
    filtered_image.filter(diameter, sigmacolor, sigmaspace, scaling_ratio);
  }

  void sigmacolor_value_changed()
  {
    sigmacolor = (int)sigmacolor_trackbar.get_value();

    filtered_image.filter(diameter, sigmacolor, sigmaspace, scaling_ratio);
  }

  void sigmaspace_value_changed()
  {
    sigmaspace = (int)sigmaspace_trackbar.get_value();

    filtered_image.filter(diameter, sigmacolor, sigmaspace, scaling_ratio);
  }

  void file_open()
  {
    int rc = file_dialog.popup();

    if (rc == Gtk::RESPONSE_OK) {
      const std::string filename = file_dialog.get_filename();

      filepath.set_label(filename);

      original_image.loadImage(filename, loading_flag, scaling_ratio);
      filtered_image.loadImage(filename, loading_flag, scaling_ratio);

      filtered_image.filter(diameter, sigmacolor, sigmaspace, scaling_ratio);
    }
  }
};
}


int main(int argc, char** argv)
{
  Es::Environment env;

  try {
    std::string name = argv[0];

    Es::Application applet(argc, argv);

    Es::Args args;
    args.set(XmNx, 20);
    args.set(XmNy, 40);
    args.set(XmNwidth, 900);
    args.set(XmNheight, 400);
    args.set(XmNscalingRatio, 60); //60%
    Es::MainView mainv(applet, name, args);

    mainv.show();

    applet.run(mainv);

  } catch (Es::Exception& ex) {
    caught(ex);

  } catch (...) {
    printf("Get exception \n");
  }
  return 0;
}