| Es++ Sample: HoughLineDetector |
/******************************************************************************
*
* Copyright (c) 2017 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
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*
* HoughLineDetector.cpp
*
*****************************************************************************/
//
#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 DetectedImageView :public Es::OpenCVScrolledImageView {
private:
cv::Mat gray_image;
cv::Mat detected_image;
public:
DetectedImageView()
{
}
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();
cv::cvtColor(original_image, gray_image, COLOR_BGR2GRAY );
detected_image = original_image.clone();
scaleImage(detected_image, scaling_ratio);
}
int detect(int threshold1, int threshold2,
int scalingRatio)
{
cv::Mat& original_image = getOriginalImage();
threshold1 = (threshold1/2)*2 + 1;
threshold2 = (threshold2/2)*2 + 1;
//1 Apply cv::Canny to the grayImage to get edges in the grayImage.
cv::Canny(gray_image, detected_image,
(double)threshold1, (double)threshold2);
//2 Apply HoughLinesP to detectedImage returned by cv::Canny.
vector<Vec4i> lines;
HoughLinesP(detected_image, lines, 1, CV_PI/180, 50, 50, 10 );
//3 Put a clone of ogirinalImage to the detectedImage,
// since the detectedImage is not necessary any more.
detected_image.release();
detected_image = original_image.clone();
int detectedNumber = lines.size();
//4 Draw lines on the clone of the original image.
for( size_t i = 0; i < lines.size(); i++ ) {
Vec4i l = lines[i];
line( detected_image, Point(l[0], l[1]),
Point(l[2], l[3]), Scalar(0,0,255), 3, CV_AA);
}
scaleImage(detected_image, scalingRatio);
return detectedNumber;
}
void rescale(int scaling_ratio)
{
OpenCVScrolledImageView::scaleImage(detected_image, scaling_ratio);
}
};
// Inner classes end.
///////////////////////////////////////////////////////
Es::Label filepath;
Es::HorizontalLayout horiz_layout;
Es::VerticalLayout control_pane;
OriginalImageView original_image;
DetectedImageView detected_image;
int loading_flag;
Es::OpenCVScaleComboBox scale_combobox;
int threshold1;
Es::LabeledTrackBar threshold1_trackbar;
int threshold2;
Es::LabeledTrackBar threshold2_trackbar;
int scaling_ratio; //Percentage.
static const int CONTROLPANE_WIDTH = 200;
std::string filename;
Es::Label detected_number;
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/GinzaWako.png";
filepath.set_label(filename);
int ww = (w - CONTROLPANE_WIDTH)/2;
filepath.set_size_request(w, 30);
original_image.set_size_request(ww, h);
detected_image.set_size_request(ww, h);
control_pane.set_size_request( CONTROLPANE_WIDTH, h);
horiz_layout.pack_start(original_image);
horiz_layout.pack_start(detected_image);
horiz_layout.pack_start(control_pane, FALSE, FALSE, 0);
scale_combobox.set_selection(scaling_ratio);
scale_combobox.set_changed_callback(
sigc::mem_fun(*this, &MainView::scale_changed) );
threshold1_trackbar.set_label("Canny Threshold1:[0,300]");
threshold1 = 120;
threshold1_trackbar.configure_adjuster(threshold1, 0, 300);
threshold1_trackbar.set_value_changed_callback(
sigc::mem_fun(*this, &MainView::threshold1_changed) );
threshold2_trackbar.set_label("Canny Threshold2:[0,300]");
threshold2 = 130;
threshold2_trackbar.configure_adjuster(threshold2, 0, 300);
threshold2_trackbar.set_value_changed_callback(
sigc::mem_fun(*this, &MainView::threshold2_changed) );
control_pane.set_spacing(20);
control_pane.pack_start(scale_combobox, Gtk::PACK_SHRINK);
control_pane.pack_start(threshold1_trackbar, Gtk::PACK_SHRINK);
control_pane.pack_start(threshold2_trackbar, Gtk::PACK_SHRINK);
control_pane.pack_start(detected_number, Gtk::PACK_SHRINK);
loading_flag = IMREAD_COLOR;
original_image.loadImage(filename, loading_flag, scaling_ratio);
detected_image.loadImage(filename, loading_flag, scaling_ratio);
int number = detected_image.detect(threshold1,
threshold2, scaling_ratio);
detected_number.set_number("DetectedNumber:", number);
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);
detected_image.rescale(scaling_ratio);
}
void threshold1_changed()
{
threshold1 = threshold1_trackbar.get_value();
int number = detected_image.detect(threshold1,
threshold2, scaling_ratio);
detected_number.set_number("DetectedNumber:", number);
}
void threshold2_changed()
{
threshold2 = threshold2_trackbar.get_value();
int number = detected_image.detect(threshold1,
threshold2, scaling_ratio);
detected_number.set_number("DetectedNumber:", number);
}
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);
detected_image.loadImage(filename, loading_flag, scaling_ratio);
int number = detected_image.detect(threshold1,
threshold2, scaling_ratio);
detected_number.set_number("DetectedNumber:", number);
}
}
};
}
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, 440);
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;
}