TEMPLATE = app
TARGET = 
DEPENDPATH += .
INCLUDEPATH += .

# Input
HEADERS += mainwidget.h
FORMS += mainwidget.ui
SOURCES += main.cpp mainwidget.cpp
INCLUDEPATH += /usr/local/include \
                /usr/local/include/opencv \
                /usr/local/include/opencv2

LIBS += /usr/local/lib/libopencv_highgui.so \
        /usr/local/lib/libopencv_core.so    \
        /usr/local/lib/libopencv_imgproc.so
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#ifndef MAINWIDGET_H
#define MAINWIDGET_H

#include <QWidget>
#include <QPushButton>
#include <QLabel>
#include <QImage>
#include <iostream>
#include <opencv2/imgproc/imgproc_c.h>
#include <opencv2/legacy/legacy.hpp>
#include <opencv2/highgui/highgui.hpp>


namespace Ui {
    class MainWidget;
}

class MainWidget : public QWidget
{
    Q_OBJECT

public:
    explicit MainWidget(QWidget *parent = 0);
    QPushButton *btn;
    QLabel *srcPicLabel;
    QLabel *dstPicLabel;
    QImage *Qimg_pic;

    ~MainWidget();
public slots:
    void slot_imgshow();
private:
    Ui::MainWidget *ui;
};

#endif // MAINWIDGET_H
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#include "mainwidget.h"
#include "ui_mainwidget.h"

using namespace cv;

MainWidget::MainWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::MainWidget)
{
    ui->setupUi(this);

    btn = new QPushButton("edge_detection",this);
    connect(btn,SIGNAL(clicked()),this,SLOT(slot_imgshow()));
    srcPicLabel = new QLabel(this);
    dstPicLabel = new QLabel(this);

}
void MainWidget::slot_imgshow()
{

    Mat src = imread("lena.bmp");
    Mat dst;
    Mat src_gry;
  //  imshow("src",src);
    cvtColor(src, src_gry ,CV_BGR2GRAY);
    Canny(src_gry,dst,10,150,3);
  //  imshow("dst",dst);

    cvtColor(src,src,CV_BGR2RGB);
   // cvtColor(dst,dst,CV_8UC1);
    QImage Qimg_pic_src;
    QImage Qimg_pic_dst;
    Qimg_pic_src = QImage((const unsigned char*)(src.data),
                      src.cols,src.rows,QImage::Format_RGB888);
    srcPicLabel->setPixmap(QPixmap::fromImage(Qimg_pic_src));
    srcPicLabel->resize(srcPicLabel->pixmap()->size());

    Qimg_pic_dst = QImage((const unsigned char*)(dst.data),
                          dst.cols,dst.rows,QImage::Format_Indexed8);

    dstPicLabel->setGeometry(600,0,320,240);
    dstPicLabel->setPixmap(QPixmap::fromImage(Qimg_pic_dst));
    dstPicLabel->resize(dstPicLabel->pixmap()->size());

}

MainWidget::~MainWidget()
{
    delete ui;
}
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