zynq-7000学习笔记(十六)——opencv采集USB摄像头图像

PC平台：WINDOWS 10 64位 + 虚拟机Ubuntu 14.04

Xilinx设计开发套件：Xilinx_vivado_sdk_2015.4

开发板：Zed Board

USB摄像头：罗技 C270(720P)

Linux源码：2016_R1

Linaro文件系统：linaro-vivid-developer-20150618-705.tar.gz

QT库:qt-everywhere-opensource-src-4.7.3.tar.gz

openCV: opencv-3.1.0

一、QT界面上添加一个button和两个label，一个显示原图像，另一个显示处理后的图像

二、代码

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"


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


}

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

void MainWindow::image_show(QLabel *label, Mat image)
{
    Mat rgb;
    QImage img;

    if(image.channels()==3)
    {
        cvtColor(image,rgb,CV_BGR2RGB);
        img =QImage((const unsigned char*)(rgb.data),
                    rgb.cols,rgb.rows,
                    rgb.cols*rgb.channels(),
                    QImage::Format_RGB888);
    }
    else if(image.channels()==1)
    {
        img =QImage((const unsigned char*)(image.data),
                    image.cols,image.rows,
                    image.cols*image.channels(),
                    QImage::Format_Indexed8);
    }
    else
    {
        img =QImage((const unsigned char*)(image.data),
                    image.cols,image.rows,
                    image.cols*image.channels(),
                    QImage::Format_RGB888);
    }

    label->setPixmap(QPixmap::fromImage(img));
    label->resize(label->pixmap()->size());


}

void MainWindow::on_pushButton_clicked()
{
    Mat frame,edges, grey;
    VideoCapture cap(0);
    if(!cap.isOpened())
    {
        printf("failed to open video device\n");
    }

    cap>>frame;
    image_show(ui->label, frame);
    cvtColor(frame, edges, CV_BGR2GRAY);
    blur(edges, edges, Size(7, 7));
    Canny(edges, edges, 9, 11,3);
    image_show(ui->label_2, edges);
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include 
#include 
#include 
#include 
#include 

using namespace cv;

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;

    void image_show(QLabel *label, Mat image);
};

#endif // MAINWINDOW_H