基于Qt OpenCV的图像灰度化像素操作详解_C/C++

基于Qt OpenCV的图像灰度化像素操作详解

2023-02-21 16:25visual_eagle C/C++

这篇文章主要为大家详细介绍了基于Qt+OpenCV的图像灰度化像素操作：最大值法、平均法、加权平均值法，感兴趣的小伙伴可以了解一下

效果图

基于Qt OpenCV的图像灰度化像素操作详解

实现代码

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									#ifndef WIDGET_H

									#define WIDGET_H

									#include <QWidget>

									#include<opencv2/opencv.hpp>

									using namespace cv;

									QT_BEGIN_NAMESPACE

									namespace Ui { class Widget; }

									QT_END_NAMESPACE

									class Widget : public QWidget

									{

									    Q_OBJECT

									public:

									    Widget(QWidget *parent = nullptr);

									    ~Widget();

									private slots:

									    void TheMax(Mat Input_iamge);

									    void TheMean(Mat Input_iamge);

									    void TheMeightedMean(Mat Input_iamge);

									    void UI_init();

									private:

									    Ui::Widget *ui;

									};

									#endif // WIDGET_H

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									#include "widget.h"

									#include "ui_widget.h"

									Widget::Widget(QWidget *parent)

									    : QWidget(parent)

									    , ui(new Ui::Widget)

									{

									    ui->setupUi(this);

									    UI_init(); //init ui

									    Mat image_1=imread("D:/program/Qt/Qt5+opencv/108homework/me.png");

									    ui->image1->setPixmap(QPixmap("D:/program/Qt/Qt5+opencv/108homework/me.png"));

									    TheMax(image_1);

									    ui->image2->setPixmap(QPixmap("D:/program/Qt/Qt5+opencv/108homework/image_2.png"));

									    TheMean(image_1);

									    ui->image3->setPixmap(QPixmap("D:/program/Qt/Qt5+opencv/108homework/image_3.png"));

									    TheMeightedMean(image_1);

									    ui->image4->setPixmap(QPixmap("D:/program/Qt/Qt5+opencv/108homework/image_4.png"));

									}

									Widget::~Widget()

									{

									    delete ui;

									}

									void Widget::TheMax(Mat Input_iamge)

									{

									     int width = Input_iamge.cols;

									     int height = Input_iamge.rows;

									     Mat image_2(height,width,CV_8UC1);

									     for (int j = 0; j < height; j++)

									     {

									      for (int i = 0; i < width; i++)

									      {

									       int b  = Input_iamge.at<Vec3b>(j, i)[0];

									       int g  = Input_iamge.at<Vec3b>(j, i)[1];

									       int r  = Input_iamge.at<Vec3b>(j, i)[2];

									       image_2.at<uchar>(j, i) = saturate_cast<uchar>(max(r,max(b,g)));

									      }

									     }

									     imwrite("D:/program/Qt/Qt5+opencv/108homework/image_2.png", image_2);

									}

									void Widget::TheMean(Mat Input_iamge)

									{

									    int width = Input_iamge.cols;

									    int height = Input_iamge.rows;

									    Mat image_3(height,width,CV_8UC1);

									    for (int j = 0; j < height; j++)

									    {

									     for (int i = 0; i < width; i++)

									     {

									      int b  = Input_iamge.at<Vec3b>(j, i)[0];

									      int g  = Input_iamge.at<Vec3b>(j, i)[1];

									      int r  = Input_iamge.at<Vec3b>(j, i)[2];

									      image_3.at<uchar>(j, i) = saturate_cast<uchar>((r+g+b)/3);

									     }

									    }

									    imwrite("D:/program/Qt/Qt5+opencv/108homework/image_3.png", image_3);

									}

									void Widget::TheMeightedMean(Mat Input_iamge)

									{

									    int width = Input_iamge.cols;

									    int height = Input_iamge.rows;

									    Mat image_4(height,width,CV_8UC1);

									    for (int j = 0; j < height; j++)

									    {

									     for (int i = 0; i < width; i++)

									     {

									      int b  = Input_iamge.at<Vec3b>(j, i)[0];

									      int g  = Input_iamge.at<Vec3b>(j, i)[1];

									      int r  = Input_iamge.at<Vec3b>(j, i)[2];

									      image_4.at<uchar>(j, i) = saturate_cast<uchar>(0.299*r + 0.587*g + 0.114*b);

									     }

									    }

									    imwrite("D:/program/Qt/Qt5+opencv/108homework/image_4.png", image_4);

									}

									void Widget::UI_init()

									{

									    ui->image1->setFrameShape(QFrame::Box);

									    ui->image1->setFrameShadow(QFrame::Sunken);

									    ui->image1->setLineWidth(5);

									    ui->image1->setLineWidth(10);

									    ui->image2->setFrameShape(QFrame::Box);

									    ui->image2->setFrameShadow(QFrame::Sunken);

									    ui->image2->setLineWidth(5);

									    ui->image2->setLineWidth(10);

									    ui->image3->setFrameShape(QFrame::Box);

									    ui->image3->setFrameShadow(QFrame::Sunken);

									    ui->image3->setLineWidth(5);

									    ui->image3->setLineWidth(10);

									    ui->image4->setFrameShape(QFrame::Box);

									    ui->image4->setFrameShadow(QFrame::Sunken);

									    ui->image4->setLineWidth(5);

									    ui->image4->setLineWidth(10);

									}