| Es++ Sample: ContourFinder |
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*
* Copyright (c) 2017 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
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*
* ContourFinder.cpp
*
*****************************************************************************/
//2017/10/18
//See: http://docs.opencv.org/3.2.0/df/d0d/tutorial_find_contours.html
//
#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;
cv::Mat contour_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();
detected_image = original_image.clone();
cv::cvtColor(original_image, gray_image, COLOR_BGR2GRAY );
contour_image = gray_image.clone();
scaleImage(contour_image, scaling_ratio);
}
//The following method is based on the sample code
// on http://docs.opencv.org/3.2.0/df/d0d/tutorial_find_contours.html
void detect(int threshold1, int threshold2, int scaling_ratio)
{
cv::RNG rng;
cv::Mat& original_image = getOriginalImage();
threshold1 = (threshold1/2)*2 + 1;
threshold2 = (threshold2/2)*2 + 1;
cv::Canny(gray_image, detected_image,
(double)threshold1, (double)threshold2);
std::vector<std::vector<cv::Point> > contours;
std::vector<cv::Vec4i> hierarchy;
//2 find contours on the canny edge-detected image
cv::findContours(detected_image, contours, hierarchy,
RETR_TREE, CHAIN_APPROX_SIMPLE, Point(0, 0) );
contour_image = Mat::zeros(detected_image.size(), CV_8UC3 );
for( size_t i = 0; i< contours.size(); i++ ) {
cv::Scalar color = cv::Scalar( rng.uniform(0, 255),
rng.uniform(0,255), rng.uniform(0,255) );
cv::drawContours(contour_image, contours, (int)i, color, 2, 8,
hierarchy, 0, Point() );
}
scaleImage(contour_image, scaling_ratio);
}
void rescale(int scaling_ratio)
{
OpenCVScrolledImageView::scaleImage(contour_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;
Es::LabeledTrackBar threshold1_trackbar;
int threshold1;
Es::LabeledTrackBar threshold2_trackbar;
int threshold2;
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/Geometry.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);
threshold1 = 50;
threshold1_trackbar.set_label("CannyThreshold1: [0, 300]");
threshold1_trackbar.configure_adjuster((double)threshold1, 0.0f, 300.0f);
threshold1_trackbar.set_value_changed_callback(
sigc::mem_fun(*this, &MainView::threshold1_value_changed) );
threshold2 = 100;
threshold2_trackbar.set_label("CannyThreshold2: [0, 300]");
threshold2_trackbar.configure_adjuster((double)threshold2, 0.0f, 300.0f);
threshold2_trackbar.set_value_changed_callback(
sigc::mem_fun(*this, &MainView::threshold2_value_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);
scale_combobox.set_changed_callback(
sigc::mem_fun(*this, &MainView::scale_changed) );
loading_flag = IMREAD_COLOR;
original_image.loadImage(filename, loading_flag, scaling_ratio);
detected_image.loadImage(filename, loading_flag, scaling_ratio);
detected_image.detect(threshold1, threshold2, 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);
detected_image.rescale(scaling_ratio);
}
void threshold1_value_changed()
{
threshold1 = (int)threshold1_trackbar.get_value();
detected_image.detect(threshold1, threshold2, scaling_ratio);
}
void threshold2_value_changed()
{
threshold2 = (int)threshold2_trackbar.get_value();
detected_image.detect(threshold1, threshold2, 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);
detected_image.loadImage(filename, loading_flag, scaling_ratio);
detected_image.detect(threshold1, threshold2, 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;
}