Qt功能优化：Qt人脸识别
文章目录
- Qt功能优化：Qt人脸识别
- 一、效果图
- 二、使用步骤
- 1. .pro部分
- 2. .h部分
- 3. .cpp部分
- 4. .ui部分：
- 总结
一、效果图
如图1所示，为我用Qt所做的一个简易的人脸识别代码，点击识别即可自动识别出照片中的人脸。
二、使用步骤
项目架构：
1. .pro部分
代码如下：
#-------------------------------------------------
#
# Project created by QtCreator 2021-08-01T20:37:50
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = OpencvFace
TEMPLATE = app
# The following define makes your compiler emit warnings if
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler).
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
main.cpp \
mainwindow.cpp
HEADERS += \
mainwindow.h
FORMS += \
mainwindow.ui
INCLUDEPATH += D:\TYUT\C-yunding\ProgramApp\C++\Qt\OpenCV_3.4.3-Build\install\include
LIBS += D:\TYUT\C-yunding\ProgramApp\C++\Qt\OpenCV_3.4.3-Build\install\x86\mingw\bin\libopencv_*.dll
2. .h部分
代码如下：
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include "opencv2/opencv.hpp"
#include <vector>
using namespace cv;
using namespace std;
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void initMainWindow();
void imgProc();
void imgShow();
private slots:
void on_detectPushButton_clicked();
private:
Ui::MainWindow *ui;
Mat myImg;
QImage myQImg;
};
#endif // MAINWINDOW_H
3. .cpp部分
代码如下：
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
initMainWindow();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::initMainWindow()
{
QString imgPath = "ly.jpg";//你要识别的图片，所在位置需与pro文件在同级目录
Mat imgData = imread(imgPath.toLatin1().data());
cvtColor(imgData,imgData,COLOR_BGR2RGB);
myImg = imgData;
myQImg = QImage((const unsigned char*)(imgData.data),imgData.cols,imgData.rows,QImage::Format_RGB888);
imgShow();
}
void MainWindow::imgShow()
{
ui->viewLabel->setPixmap(QPixmap::fromImage(myQImg.scaled(ui->viewLabel->size(),Qt::KeepAspectRatio)));
}
void MainWindow::imgProc()
{
CascadeClassifier face_detector;
CascadeClassifier eyes_detector;
string fDetectorPath = "haarcascade_frontalface_alt.xml";
face_detector.load(fDetectorPath);
string eDetectorPath = "haarcascade_eye_tree_eyeglasses.xml";
eyes_detector.load(eDetectorPath);
vector<Rect> faces;
Mat imgSrc = myImg;
Mat imgGray;
cvtColor(imgSrc,imgGray,CV_RGB2GRAY);
equalizeHist(imgGray,imgGray);
face_detector.detectMultiScale(imgGray,faces,1.1,2,0 | CV_HAAR_SCALE_IMAGE,Size(30,30));
for(int i=0; i<faces.size(); i++)
{
Point center(faces[i].x + faces[i].width * 0.5,faces[i].y + faces[i].height * 0.5);
ellipse(imgSrc,center,Size(faces[i].width * 0.5,faces[i].height * 0.5),0,0,360,Scalar(255,0,255),4,8,0);
Mat faceROI = imgGray(faces[i]);
vector<Rect> eyes;
eyes_detector.detectMultiScale(faceROI,eyes,1.1,2,0 | CV_HAAR_SCALE_IMAGE,Size(30,30));
for(int j=0; j<eyes.size(); j++)
{
Point center(faces[i].x + eyes[j].x + eyes[j].width * 0.5,faces[i].y + eyes[j].y + eyes[j].height * 0.5);
int radius = cvRound((eyes[j].width + eyes[i].height) * 0.25);
circle(imgSrc,center,radius,Scalar(255,0,0),4,8,0);
}
Mat imgDst = imgSrc;
myQImg = QImage((const unsigned char*)(imgDst.data),imgDst.cols,imgDst.rows,QImage::Format_RGB888);
imgShow();
}
}
void MainWindow::on_detectPushButton_clicked()
{
imgProc();
}
4. .ui部分：
代码如下：
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>600</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralWidget">
<widget class="QLabel" name="viewLabel">
<property name="geometry">
<rect>
<x>30</x>
<y>10</y>
<width>401</width>
<height>541</height>
</rect>
</property>
<property name="text">
<string/>
</property>
</widget>
<widget class="QPushButton" name="detectPushButton">
<property name="geometry">
<rect>
<x>630</x>
<y>380</y>
<width>101</width>
<height>41</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>14</pointsize>
</font>
</property>
<property name="text">
<string>识别</string>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menuBar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>17</height>
</rect>
</property>
</widget>
<widget class="QToolBar" name="mainToolBar">
<attribute name="toolBarArea">
<enum>TopToolBarArea</enum>
</attribute>
<attribute name="toolBarBreak">
<bool>false</bool>
</attribute>
</widget>
<widget class="QStatusBar" name="statusBar"/>
</widget>
<layoutdefault spacing="6" margin="11"/>
<resources/>
<connections/>
</ui>
总结
以上是部分Qt关于功能优化的部分，所有相关的Qt界面优化的部分，均在下方专栏——Qt功能优化中，大家如果感兴趣可以进行观看并使用，希望通过这些文章能够使大家的Qt软件更加美观和完美 ！！！
