OZ++ Sample: EdgePreservingFilter |
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* EdgePreservingFilter.cpp
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//2018/04/10
//photo.hpp
/** @brief Filtering is the fundamental operation in image and video processing. Edge-preserving smoothing
filters are used in many different applications @cite EM11 .
@param src Input 8-bit 3-channel image.
@param dst Output 8-bit 3-channel image.
@param flags Edge preserving filters:
- **RECURS_FILTER** = 1
- **NORMCONV_FILTER** = 2
@param sigma_s Range between 0 to 200.
@param sigma_r Range between 0 to 1.
CV_EXPORTS_W void edgePreservingFilter(InputArray src, OutputArray dst, int flags = 1,
float sigma_s = 60, float sigma_r = 0.4f);
*/
//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 FilteredImageView: public OpenCVImageView {
private:
cv::Mat originalImage;
cv::Mat filteredImage;
cv::Mat scaledImage;
//The scaled image is displayed on this image view.
virtual void display()
{
show(scaledImage);
}
public:
FilteredImageView(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);
}
}
~FilteredImageView()
{
}
void loadImage(const char* filename,
int imageLoadingFlag= CV_LOAD_IMAGE_COLOR,
int scalingRatio=100)
{
originalImage = readImage(filename, imageLoadingFlag);
filteredImage = originalImage.clone();
scaleImage(filteredImage, scaledImage, scalingRatio);
}
void rescale(int scalingRatio)
{
scaledImage.release();
scaleImage(filteredImage, scaledImage, scalingRatio);
}
void filter(int sigmaColor, int sigmaSpace, int scalingRatio)
{
try {
int flag = RECURS_FILTER ; //NORMCONV_FILTER is very slow;
cv::edgePreservingFilter(
originalImage,
filteredImage,
flag,
(double)sigmaSpace,
(double)sigmaColor/100.0f);
} catch (cv::Exception& ex) {
; //Ignore
}
scaleImage(filteredImage, scaledImage, scalingRatio);
}
};
//Inner classes end.
private:
StringT<char> imageFile;
int imageLoadingFlag;
int imageScalingRatio; //percentage
SmartPtr<Label> label;
SmartPtr<OriginalImageView> originalImage;
SmartPtr<FilteredImageView> filteredImage;
SmartPtr<RowColumn> controlPane;
SmartPtr<OpenCVScaleComboBox> scaleComboBox;
static const int SIGMA_COLOR_MAX =200;
int sigmaColor;
SmartPtr<LabeledTrackBar> sigmaColorTrackBar;
static const int SIGMA_SPACE_MAX=100;
int sigmaSpace;
SmartPtr<LabeledTrackBar> sigmaSpaceTrackBar;
SmartPtr<FileOpenDialog> fileDialog;
public:
void scaleChanged(Action& action)
{
int val = scaleComboBox->getScale();
if (val > 0 && imageScalingRatio != val) {
imageScalingRatio = val;
originalImage -> rescale(imageScalingRatio);
filteredImage -> rescale(imageScalingRatio);
}
}
void trackBarScrolled1(Action& action)
{
sigmaColor = sigmaColorTrackBar->getPosition();
sigmaSpace = sigmaSpaceTrackBar->getPosition();
filteredImage->filter(sigmaColor, sigmaSpace, imageScalingRatio);
}
void trackBarScrolled2(Action& action)
{
sigmaColor = sigmaColorTrackBar->getPosition();
sigmaSpace = sigmaSpaceTrackBar->getPosition();
filteredImage->filter(sigmaColor, sigmaSpace, imageScalingRatio);
}
void cancel(Action& action)
{
fileDialog->popdown();
}
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();
filteredImage ->loadImage(filename,
imageLoadingFlag, imageScalingRatio);
sigmaColor = sigmaColorTrackBar->getPosition();
sigmaSpace = sigmaSpaceTrackBar->getPosition();
filteredImage->filter(sigmaColor, sigmaSpace, imageScalingRatio);
updateLabel(filename);
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 && filteredImage && controlPane
) {
label -> reshape(0, 0, w, LB_HEIGHT);
originalImage-> reshape(0, LB_HEIGHT, ww/2, hh);
filteredImage -> 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/flower.png";
imageLoadingFlag = CV_LOAD_IMAGE_COLOR;
imageScalingRatio = 60; //%
try {
Args ar;
CompoundString fileNamecs(imageFile);
ar.set(XmNlabelString, fileNamecs);
ar.set(XmNalignment, XmALIGNMENT_BEGINNING);
label = new Label(bboard, "", ar);
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);
filteredImage = new FilteredImageView(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);
sigmaColor = 160;
sigmaSpace = 40;
ar.reset();
CompoundString th1Title("SigmaColor:[1,200]");
ar.set(XmNminimum, 1);
ar.set(XmNmaximum, SIGMA_COLOR_MAX);
ar.set(XmNvalue, sigmaColor);
ar.set(XmNtitleString, th1Title);
sigmaColorTrackBar = new LabeledTrackBar(controlPane, "", ar);
sigmaColorTrackBar->addCallback(XmNvalueChangedCallback, this,
(Callback)&MainView::trackBarScrolled1, NULL);
ar.reset();
CompoundString th2Title("SigmaSpace:[0,100]");
ar.set(XmNminimum, 0);
ar.set(XmNmaximum, SIGMA_SPACE_MAX);
ar.set(XmNvalue, sigmaSpace);
ar.set(XmNtitleString, th2Title);
sigmaSpaceTrackBar = new LabeledTrackBar(controlPane, "", ar);
sigmaSpaceTrackBar->addCallback(XmNvalueChangedCallback, this,
(Callback)&MainView::trackBarScrolled2, NULL);
filteredImage->filter(sigmaColor, sigmaSpace, 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;
}