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SOL9 Sample: CannyEdgeDetector
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1 Screenshot
2 Source code
/*
* CannyEdgeDetector.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"
// void Canny(const Mat& image, Mat& edges,
// double threshold1, double threshold2, int apertureSize=3, bool L2gradient=false)
// See also: https://en.wikipedia.org/wiki/Canny_edge_detector
#define _CONSOLE_
#include <sol/ModuleFileName.h>
#include <sol/DropFiles.h>
#include <sol/LabeledTrackBar.h>
#include <sol/FileDialog.h>
#include <sol/StringT.h>
#include <sol/opencv/OpenCVApplicationView.h>
#include <sol/opencv/OpenCVImageView.h>
namespace SOL {
class MainView :public OpenCVApplicationView {
private:
////////////////////////////////////////////////////////////////////////////////////////
//Inner class starts.
class OriginalImageView :public OpenCVImageView {
private:
cv::Mat originalImage;
cv::Mat& getMat()
{
return originalImage;
}
void display()
{
show(originalImage);
}
public:
OriginalImageView(View* parent, const char* name, Args& args)
:OpenCVImageView(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 DetectedImageView :public OpenCVImageView {
private:
cv::Mat originalImage;
cv::Mat grayImage;
cv::Mat detectedImage;
cv::Mat& getMat()
{
return detectedImage;
}
void display()
{
show(detectedImage);
}
public:
DetectedImageView(View* parent, const char* name, Args& args)
:OpenCVImageView(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);
}
}
~DetectedImageView()
{
}
void loadImage(const char* filename, int imageLoadingFlag=CV_LOAD_IMAGE_COLOR)
{
try {
originalImage = readImage( filename, imageLoadingFlag );
detectedImage.create( originalImage.size(), originalImage.type() );
cv::cvtColor( originalImage, grayImage, COLOR_BGR2GRAY );
refresh();
} catch(Exception& ex) {
caught(ex);
}
}
void detectEdge(double threshold1, double threshold2)
{
cv::Canny(grayImage, detectedImage, threshold1, threshold2);
refresh();
}
};
//Inner class ends.
////////////////////////////////////////////////////////////////////////////////////////
StringT<char> imageFile;
StringT<char> savedImageFile;
SmartPtr<OriginalImageView> originalImage;
SmartPtr<DetectedImageView> detectedImage;
int threshold1Max;
int threshold1;
SmartPtr<LabeledTrackBar> threshold1TrackBar;
int threshold2Max;
int threshold2;
SmartPtr<LabeledTrackBar> threshold2TrackBar;
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 threshold1TrackBar and threshold2TrackBar.
void trackBarScrolled(Action& action)
{
threshold1 = threshold1TrackBar->getPosition();
threshold2 = threshold2TrackBar->getPosition();
detectedImage -> detectEdge((double)threshold1, (double)threshold2);
}
void resize(int w, int h)
{
if (originalImage && detectedImage &&
threshold1TrackBar && threshold2TrackBar) {
originalImage -> reshape(2, 2, (w-160)/2-1, h-4);
detectedImage -> reshape((w-160)/2+1, 2, (w-160)/2-1, h-4);
threshold1TrackBar -> reshape(w-155 + 10, 10, 155, 60);
threshold2TrackBar -> reshape(w-155 + 10, 80, 155, 60);
}
}
void openFile(const char* filename)
{
try {
originalImage -> loadImage(filename);
detectedImage -> loadImage(filename);
const char* fname = strrchr(filename, '\\');
if (fname) {
fname++;
}
imageFile = fname;
updateCaption();
detectedImage -> detectEdge((double)threshold1, (double)threshold2);
} 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\\Cloud.png";
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);
detectedImage = new DetectedImageView(this, "cvwindow2", ar);
threshold1Max = 300;
threshold2Max = 300;
threshold1 = 50;
threshold2 = 100;
ar.reset();
ar.set(XmNminimum, 0);
ar.set(XmNmaximum, threshold1Max);
ar.set(XmNposition, threshold1);
ar.set(XmNdisplayOddValue, false);
threshold1TrackBar = new LabeledTrackBar(this, "Threshold1", ar);
threshold1TrackBar -> addCallback(XmNtrackBarScrollCallback, this,
(Callback)&MainView::trackBarScrolled, NULL);
ar.reset();
ar.set(XmNminimum, 0);
ar.set(XmNmaximum, threshold2Max);
ar.set(XmNposition, threshold2);
ar.set(XmNdisplayOddValue, false);
threshold2TrackBar = new LabeledTrackBar(this, "Threshold2", ar);
threshold2TrackBar -> addCallback(XmNtrackBarScrollCallback, this,
(Callback)&MainView::trackBarScrolled, NULL);
addCallback(XmNmenuCallback, IDM_EXIT, this,
(Callback)&MainView::confirm, NULL);
detectedImage->detectEdge(threshold1, threshold2);
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);
}
}
//2017/12/01
void save(Action& action)
{
try {
if (!savedImageFile.isEmpty()) {
//Write detected image into the filename.
detectedImage->writeImage(savedImageFile);
} else {
saveAs(action);
}
} catch (Exception& ex) {
caught(ex);
}
}
//2017/12/01
void saveAs(Action& action)
{
Args ar;
char dir[MAX_PATH] = { 0 };
if (restoreFileFolder(dir, CountOf(dir))) {
ar.set(XmNdirectory, dir);
filedlg.setValues(ar);
}
try {
if(filedlg.save()) {
const char* filename = filedlg.getFileName();
saveFileFolder(filename);
//Write detected image into the filename.
detectedImage->writeImage(filename);
savedImageFile = 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: 2 Dec. 2017
Copyright (c) 2017 Antillia.com ALL RIGHTS RESERVED.