OZ++ Sample: SobelEdgeDetector |
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* SobelEdgeDetector.cpp
*
*****************************************************************************/
//2017/05/25
/*void cv::Sobel ( InputArray src,
OutputArray dst,
int ddepth,
int dx,
int dy,
int ksize = 3,
double scale = 1,
double delta = 0,
int borderType = BORDER_DEFAULT
)
*/
//2019/01/03
#include <opencv2/stitching.hpp>
#include <oz++/motif/Label.h>
#include <oz++/motif/RowColumn.h>
#include <oz++/motif/LabeledTrackBar.h>
#include <oz++/opencv/OpenCVScaleComboBox.h>
#include <oz++/opencv/OpenCVMainView.h>
#include <oz++/opencv/OpenCVImageView.h>
#include <oz++/motif/FileOpenDialog.h>
namespace OZ {
class MainView :public OpenCVMainView {
private:
///////////////////////////////////////////////
//Inner classes start.
class OriginalImageView: public OpenCVImageView {
private:
cv::Mat originalImage;
cv::Mat scaledImage;
virtual void display()
{
show(scaledImage);
}
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);
int scalingRatio = (int)args.get(XmNimageScalingRatio);
loadImage(filename, imageLoadingFlag, scalingRatio);
} catch (OZ::Exception ex) {
caught(ex);
}
}
~OriginalImageView()
{
}
void loadImage(const char* filename,
int imageLoadingFlag= CV_LOAD_IMAGE_COLOR,
int scalingRatio=100)
{
originalImage = readImage(filename, imageLoadingFlag);
scaleImage(originalImage, scaledImage, scalingRatio);
}
void rescale(int scalingRatio)
{
scaledImage.release();
scaleImage(originalImage, scaledImage, scalingRatio);
}
};
class DetectedImageView: public OpenCVImageView {
private:
cv::Mat originalImage;
cv::Mat blurredImage;
cv::Mat grayImage;
cv::Mat detectedImage;
cv::Mat scaledImage;
//The scale image is displayed on this image view.
virtual void display()
{
show(scaledImage);
}
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);
int scalingRatio = (int)args.get(XmNimageScalingRatio);
loadImage(filename, imageLoadingFlag, scalingRatio);
} catch (OZ::Exception ex) {
caught(ex);
}
}
~DetectedImageView()
{
}
void loadImage(const char* filename,
int imageLoadingFlag= CV_LOAD_IMAGE_COLOR,
int scalingRatio=100)
{
originalImage = readImage(filename, imageLoadingFlag);
blurredImage = originalImage.clone();
}
void rescale(int scalingRatio)
{
scaledImage.release();
scaleImage(detectedImage, scaledImage, scalingRatio);
}
void detectEdge(int ksize, int sigma, int scalingRatio)
{
ksize = (ksize/2)*2 + 1;
//Blur operation is applied to the original image.
cv::GaussianBlur(originalImage, blurredImage, cv::Size(ksize, ksize),
(double)sigma, //sigmaX,
(double)sigma); //sigmaY
cv::cvtColor( blurredImage, grayImage, COLOR_BGR2GRAY );
int scale = 1;
int delta = 0;
int ddepth = CV_16S;
Mat gradX, gradY;
Mat absGradX, absGradY;
cv::Sobel(grayImage, gradX, ddepth, 1, 0, ksize,
scale, delta, BORDER_DEFAULT );
cv::Sobel(grayImage, gradY, ddepth, 0, 1, ksize,
scale, delta, BORDER_DEFAULT );
convertScaleAbs( gradX, absGradX );
convertScaleAbs( gradY, absGradY );
addWeighted( absGradX, 0.5, absGradY, 0.5, 0, detectedImage );
scaleImage(detectedImage, scaledImage, scalingRatio);
}
};
//Inner classes end.
private:
StringT<char> imageFile;
int imageLoadingFlag;
int imageScalingRatio; //percentage
SmartPtr<Label> label;
SmartPtr<OriginalImageView> originalImage;
SmartPtr<DetectedImageView> detectedImage;
SmartPtr<RowColumn> controlPane;
SmartPtr<OpenCVScaleComboBox> scaleComboBox;
SmartPtr<LabeledTrackBar> ksizeTrackBar;
int ksize;
SmartPtr<LabeledTrackBar> sigmaTrackBar;
int sigma;
SmartPtr<FileOpenDialog> fileDialog;
public:
void scaleChanged(Action& action)
{
int val = scaleComboBox->getScale();
if (val > 0 && imageScalingRatio != val) {
imageScalingRatio = val;
originalImage -> rescale(imageScalingRatio);
detectedImage -> rescale(imageScalingRatio);
}
}
void ksizeChanged(Action& action)
{
ksize = (int)ksizeTrackBar->get(XmNvalue);
printf("ksizeChanged ksize=%d\n", ksize);
detectedImage -> detectEdge(ksize, sigma, imageScalingRatio);
}
void sigmaChanged(Action& action)
{
sigma = sigmaTrackBar->get(XmNvalue);
printf("sigmaChanged sigma=%d\n", sigma);
detectedImage -> detectEdge(ksize, sigma, imageScalingRatio);
}
void fileOpen(Action& action)
{
fileDialog->popup();
}
void updateLabel(const char* filename)
{
CompoundString cs(filename);
label->set(XmNlabelString, cs);
}
void ok(Action& action)
{
try {
imageFile = fileDialog->getFileName();
const char* filename = (const char*)imageFile;
printf("filename: %s\n", filename);
fileDialog->popdown();
originalImage->invalidate();
originalImage->loadImage(filename,
imageLoadingFlag, imageScalingRatio);
originalImage->invalidate();
detectedImage ->loadImage(filename,
imageLoadingFlag, imageScalingRatio);
detectedImage -> detectEdge(ksize, sigma, imageScalingRatio);
updateLabel(imageFile);
resize(width(), height());
flush();
} catch (OZ::Exception& ex) {
caught(ex);
}
}
void resize(Dimension w, Dimension h)
{
int CP_WIDTH = 200;
int LB_HEIGHT = 30;
int ww = w-CP_WIDTH;
int hh = h - LB_HEIGHT;
if (label && originalImage && detectedImage && controlPane
) {
label -> reshape(0, 0, w, LB_HEIGHT);
originalImage-> reshape(0, LB_HEIGHT, ww/2, hh);
detectedImage -> reshape(ww/2, LB_HEIGHT, ww/2-1, hh);
controlPane -> reshape(ww-1, LB_HEIGHT, CP_WIDTH+1, hh);
//The following two lines are a workaround to erase garbage.
controlPane -> unmap();
controlPane -> map();
}
flush();
}
public:
MainView(OpenCVApplication& applet, const char* name, Args& args)
:OpenCVMainView(applet, name, args)
{
BulletinBoard* bboard = getBulletinBoard();
imageFile = "../images/GinzaWako.png";
imageLoadingFlag = CV_LOAD_IMAGE_COLOR;
imageScalingRatio = 60; //%
try {
Args ar;
ar.set(XmNalignment, XmALIGNMENT_BEGINNING);
label = new Label(bboard, "", ar);
updateLabel(imageFile);
ar.reset();
ar.set(XmNimageFileName, imageFile);
ar.set(XmNimageLoadingFlag, imageLoadingFlag);
ar.set(XmNimageScalingRatio, imageScalingRatio);
originalImage = new OriginalImageView(bboard, "", ar);
ar.reset();
ar.set(XmNimageFileName, imageFile);
ar.set(XmNimageLoadingFlag, imageLoadingFlag);
ar.set(XmNimageScalingRatio, imageScalingRatio);
detectedImage = new DetectedImageView(bboard, "", ar);
ar.reset();
controlPane = new RowColumn(bboard, "", ar);
const char* defaultScale= "60%";
ar.reset();
CompoundString scaler("Scale");
ar.set(XmNlabelString, scaler);
ar.set(XmNdefaultScale, defaultScale);
scaleComboBox = new OpenCVScaleComboBox(controlPane, "", ar);
scaleComboBox->addCallback(XmNselectionCallback, this,
(Callback)&MainView::scaleChanged, NULL);
ksize = 5;
ar.reset();
CompoundString ksizecs("KernelSize:[0,31]");
ar.set(XmNminimum, 0);
ar.set(XmNmaximum, 31);
ar.set(XmNvalue, ksize);
ar.set(XmNtitleString, ksizecs);
ksizeTrackBar = new LabeledTrackBar(controlPane, "", ar);
ksizeTrackBar->addCallback(XmNvalueChangedCallback, this,
(Callback)&MainView::ksizeChanged, NULL);
ar.reset();
CompoundString sigmacs("Sigma:[0,20]");
sigma = 3;
ar.set(XmNminimum, 0);
ar.set(XmNmaximum, 20);
ar.set(XmNvalue, sigma );
ar.set(XmNtitleString, sigmacs);
sigmaTrackBar = new LabeledTrackBar(controlPane, "", ar);
sigmaTrackBar->addCallback(XmNvalueChangedCallback, this,
(Callback)&MainView::sigmaChanged, NULL);
detectedImage -> detectEdge(ksize, sigma, imageScalingRatio);
ar.reset();
fileDialog = new FileOpenDialog(this, "FileOpenDialog", ar);
fileDialog -> getOkButton()
-> addCallback(XmNactivateCallback, this,
(Callback)&MainView::ok, NULL);
sendConfigureEvent();
} catch(OZ::Exception& ex) {
caught(ex);
}
}
~MainView()
{
}
};
}
//
int main(int argc, char** argv)
{
try {
const char* appclass = argv[0];
OpenCVApplication applet(appclass, argc, argv);
Args args;
args.set(XmNwidth, 900);
args.set(XmNheight, 380);
MainView view(applet, argv[0], args);
view.realize();
applet.run();
} catch (OZ::Exception& ex) {
caught(ex);
}
return 0;
}