SOL9 Sample: ContrastAndBrightnessAdjuster

SOL9 2.0 Samples

1 Screenshot


2 Source code

/*
 * ContrastAndBrightnessAdjuster.cpp 
 * Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. 
 */


//2017/03/30

// Please see "http://docs.opencv.org/2.4/doc/tutorials/core/basic_linear_transform/basic_linear_transform.html#basic-linear-transform"
// Changing the contrast and brightness of an image!

#define _CONSOLE_

#include <sol/ModuleFileName.h>
#include <sol/DropFiles.h>
#include <sol/LabeledTrackBar.h>
#include <sol/FileDialog.h>
#include <sol/Profile.h>
#include <sol/StringT.h>
#include <sol/opencv/OpenCVApplicationView.h>
#include <sol/opencv/OpenCVNamedWindow.h>
#include <sol/opencv/OpenCVNamedWindow.h>

namespace SOL {

class MainView :public OpenCVApplicationView {

private:
  ////////////////////////////////////////////////////////////////////////////////////////
  //Inner class starts.
  class OriginalImageView :public OpenCVNamedWindow {
  private:
    cv::Mat originalImage;
    
    void display()
    {
      show(originalImage);
    }
    
  public:
    OriginalImageView(View* parent, const char* name, Args& args)
    :OpenCVNamedWindow(parent, name, args)
    {
      try {
        const char* filename = (const char*)args.get(XmNimageFileName);
        int imageLoadingFlag = args.get(XmNimageLoadingFlag);

        originalImage = readImage(filename, imageLoadingFlag);
        
      } catch (SOL::Exception ex) {
        caught(ex);
      }
    }
    
    ~OriginalImageView()
    {
    }
    
    void loadImage(const char* filename, int imageLoadingFlag=CV_LOAD_IMAGE_COLOR)
    {
      try {
        originalImage = readImage(filename, imageLoadingFlag);
        refresh();
      } catch (Exception& ex) {
        caught(ex);
      }
    }
  };
  
  class ConvertedImageView :public OpenCVNamedWindow {
  private:
    cv::Mat originalImage;
    cv::Mat convertedImage;
    
    void display()
    {
      show(convertedImage);
    }
    
  public:
    ConvertedImageView(View* parent, const char* name, Args& args)
    :OpenCVNamedWindow(parent, name, args)
    {
      try {
        const char* filename = (const char*)args.get(XmNimageFileName);
        int imageLoadingFlag = args.get(XmNimageLoadingFlag);
        loadImage(filename, imageLoadingFlag);       
      } catch (SOL::Exception ex) {
        caught(ex);
      }
    }
    
    ~ConvertedImageView()
    {
    }

    void loadImage(const char* filename, int imageLoadingFlag=CV_LOAD_IMAGE_COLOR)
    {
      try {
        originalImage = readImage(filename, imageLoadingFlag);
        convertedImage = originalImage;
        refresh();
      } catch(Exception& ex) {
        caught(ex);
      }
    }
    
    void convertImage(int alpha, int beta)
    {
      cv::Mat newImage = cv::Mat::zeros(originalImage.size(), originalImage.type() );

      originalImage.convertTo( newImage, -1, (float)alpha, beta );
      convertedImage = newImage;
      refresh();
    }
  };
  //Inner class ends.
  ////////////////////////////////////////////////////////////////////////////////////////
  
  
  StringT<char>                imageFile;
  SmartPtr<OriginalImageView>  originalImage;
  SmartPtr<ConvertedImageView> convertedImage;
    
  int                          contrast;
  SmartPtr<LabeledTrackBar>    contrastTrackBar;
  
  int                          brightness;
  SmartPtr<LabeledTrackBar>    brightnessTrackBar;
  FileDialog                   filedlg;
  
  void updateCaption()
  {
    char caption[MAX_PATH];
    sprintf_s(caption, CountOf(caption), "%s - %s", 
          (const char*)imageFile, 
          getAppName());
    setText(caption);
  }

  //Horizontal Scroll event by TrackBars
  void trackBarScrolled(Action& action)
  {
    contrast  = contrastTrackBar   ->getPosition();
    brightness = brightnessTrackBar->getPosition();
    
    convertedImage -> convertImage(contrast, brightness);

  }
  
  void resize(int w, int h)
  {
    if (originalImage && convertedImage && 
          contrastTrackBar && brightnessTrackBar) {
      originalImage      -> reshape(2,            2,  (w-160)/2-1,    h-4);
      convertedImage     -> reshape((w-160)/2+1,  2,  (w-160)/2-1,    h-4);
      contrastTrackBar   -> reshape(w-155 + 10,  40, 140, 60);      
      brightnessTrackBar -> reshape(w-155 + 10, 140, 140, 60);      
    }
  }

  void openFile(const char* filename)
  {
    try {
        originalImage   -> loadImage(filename);
        convertedImage  -> loadImage(filename);
        const char* fname = strrchr(filename, '\\');
        if (fname) {
          fname++;
        }
        imageFile = fname;

        convertedImage -> convertImage(contrast, brightness);
        
        updateCaption();
      
    } catch (Exception& ex) {
      caught(ex);
    }
  }
  
  void dropFiles(Action& action)
  {
    char fileName[MAX_PATH] = { 0 };
    DropFiles drop((HDROP)action.getWParam());
    //fileName[0] = ZERO;
    int num = drop.queryFile(0, fileName, CountOf(fileName));
    if(num > 0) {
      if (filedlg.isImageFileName(fileName)) {
        openFile(fileName);
        bringUp();
      } else {        
        bringUp(); //Activate and raise this view
        showErrorDialog("Invalid image filename", fileName,  MB_OK);
      }
    }    
  }
  
  void confirm(Action& action)
  {
    int rc = MessageBox(NULL, "Are you sure to close this window?", "Confirmation", 
                MB_OKCANCEL|MB_ICONEXCLAMATION);
    if (rc == IDOK) {
      exit(action);
    }
  }
  
public:
  MainView(OpenCVApplication& applet, const char* name, Args& args)
  :OpenCVApplicationView(applet, name, args)
  {
    imageFile = "..\\images\\flower6.jpg";
    int imageLoadingFlag = CV_LOAD_IMAGE_COLOR;
    try {
      Args ar;
      ar.set(XmNimageFileName, imageFile);
      ar.set(XmNimageLoadingFlag, imageLoadingFlag);
      originalImage = new OriginalImageView(this, "cvwindow1", ar); 
      originalImage -> addCallback(XmNdropCallback, this,
        (Callback)&MainView::dropFiles, NULL);
      
      ar.reset();
      ar.set(XmNimageFileName, imageFile);
      ar.set(XmNimageLoadingFlag, imageLoadingFlag);
      convertedImage = new ConvertedImageView(this, "cvwindow2", ar); 

      
      contrast   = 1;
      brightness = 10;

      ar.reset();
      ar.set(XmNminimum, 1);
      ar.set(XmNmaximum, 3);
      ar.set(XmNposition, contrast);
      ar.set(XmNdisplayOddValue, false);
      contrastTrackBar = new LabeledTrackBar(this, "Contrast", ar);

      contrastTrackBar -> addCallback(XmNtrackBarScrollCallback, this,
        (Callback)&MainView::trackBarScrolled, NULL);

      ar.reset();
      ar.set(XmNminimum,   0);
      ar.set(XmNmaximum,  100);
      ar.set(XmNposition, brightness);
      ar.set(XmNdisplayOddValue, false);
      brightnessTrackBar = new LabeledTrackBar(this, "Brightness", ar);

      brightnessTrackBar -> addCallback(XmNtrackBarScrollCallback, this,
        (Callback)&MainView::trackBarScrolled, NULL);
      
      addCallback(XmNmenuCallback, IDM_EXIT, this,
          (Callback)&MainView::confirm, NULL);
      
      convertedImage->convertImage(contrast, brightness);
      
      ar.reset();
      ar.set(XmNfilter, FileDialog::getImageFilesFilter());
      filedlg.create(this, "OpenFile", ar);

      updateCaption();
      
    } catch (Exception& ex) {
      caught(ex);
    }
  }

  ~MainView()
  {
  }
  
  void open(Action& action)
  {
    Args ar;
    
    char dir[MAX_PATH] = { 0 };
    if (restoreFileFolder(dir, CountOf(dir))) {
      ar.set(XmNdirectory, dir);
      filedlg.setValues(ar);
    }
    
    try {    
      if(filedlg.open()) {
    
        const char* filename = filedlg.getFileName();
        saveFileFolder(filename);
  
        openFile(filename);
        
      }
    } catch (Exception& ex) {
      caught(ex);
    }
  }  
};
}

//
void main(int argc, char** argv) 
{
  try {
    ModuleFileName module(argv[0]);
    
    const char*  name = module.getAppName();
        
    OpenCVApplication applet(name, argc, argv);

    Args args;
    args.set(XmNwidth,  860);
    args.set(XmNheight, 360);
    MainView view(applet, name, args);
    view.realize();

    applet.run();
    
  } catch (SOL::Exception& ex) {
    caught(ex);
  }
}


Last modified: 27 Apr. 2017

Copyright (c) 2017 Antillia.com ALL RIGHTS RESERVED.