OpenCV+Qt实现图像处理操作
作者:我今年十六岁
这篇文章主要为大家详细介绍了OpenCV+Qt实现图像处理操作,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
本文实例为大家分享了OpenCV+Qt实现图像处理操作的具体代码,供大家参考,具体内容如下
一、目标
Qt界面实现 雪花屏 高斯模糊 中值滤波 毛玻璃 灰度化 XY方向模糊 双边模糊 腐蚀 [图像处理操作]
要求左边原图,右边效果图
结果展示如下:[图像处理实现有点多,就不一个一个地展示了,各别展示如下]
雪花屏
毛玻璃
灰度化处理
二、使用Qt界面
使用到Qt中的UI设计界面
设计好界面之后最好先保存
对每一个按钮设计槽函数
三、图像处理操作完整代码
难点在于:Qt是QImage而OpenCV是Mat,需要Mat转QImage才能在Qt界面中进行图片的正常显示
头文件中导入opencv包
#ifndef WIDGET_H #define WIDGET_H #include<opencv2/opencv.hpp> #include <QWidget> using namespace cv; QT_BEGIN_NAMESPACE namespace Ui {class Widget;} QT_END_NAMESPACE class Widget : public QWidget { Q_OBJECT public: // Widget(QWidget *parent = nullptr); explicit Widget(QWidget *parent = 0); ~Widget(); private slots: void on_pushButton_clicked();//雪花屏 void on_pushButton_2_clicked();//高斯模糊 void on_pushButton_3_clicked();//中值滤波 void on_pushButton_4_clicked();//毛玻璃 void on_pushButton_5_clicked();//灰度化 void on_pushButton_6_clicked();//XY方向模糊 void on_pushButton_7_clicked();//双边模糊 void on_pushButton_8_clicked();//腐蚀 private: Ui::Widget *ui; Mat srcimage;//原图 }; #endif // WIDGET_H
源文件中实现图像处理方法
#include "widget.h" #include "ui_widget.h" Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); } Widget::~Widget() { delete ui; } //雪花屏 void Widget::on_pushButton_clicked() { //读取原始图片 Mat srcimage = imread("D:/000imageopencv/efls111.jpg"); //Mat转QImage 颜色 cvtColor(srcimage,srcimage,CV_BGR2RGB); //Mat转QImage 像素 oldlabel放置原图 QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height()); ui->oldlabel->setPixmap(QPixmap::fromImage(disimage)); //像素二维矩阵函数 int rows = srcimage.rows; //像素二维矩阵列数 int cols = srcimage.cols * srcimage.channels(); for(int i=0;i<rows;i++) { uchar * data = srcimage.ptr<uchar>(i); for(int j=0;j<cols;j++) { //雪花屏特效 int q = rand()%cols; data[q]=155;//某些通道随机改成155 } } //Mat转QImage 像素 newlabel放置图像处理后图片 QImage disimage2 = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height()); ui->newlabel->setPixmap(QPixmap::fromImage(disimage2)); } //高斯模糊 void Widget::on_pushButton_2_clicked() { //读取原始图片 Mat srcimage = imread("D:/000imageopencv/efls111.jpg"); //Mat转QImage 颜色 cvtColor(srcimage,srcimage,CV_BGR2RGB); //Mat转QImage 像素 oldlabel放置原图 QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); Mat retimage; //高斯模糊 GaussianBlur(srcimage,retimage,Size(5,5),0,0); //Mat转QImage 像素 newlabel放置图像处理后图片 QImage disimage2 = QImage(retimage.data,retimage.cols,retimage.rows,retimage.cols*retimage.channels(),QImage::Format_RGB888); disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height()); ui->newlabel->setPixmap(QPixmap::fromImage(disimage2)); } //中值滤波 void Widget::on_pushButton_3_clicked() { //读取原始图片 Mat srcimage = imread("D:/000imageopencv/efls111.jpg"); //Mat转QImage 颜色 cvtColor(srcimage,srcimage,CV_BGR2RGB); //Mat转QImage 像素 oldlabel放置原图 QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height()); ui->oldlabel->setPixmap(QPixmap::fromImage(disimage)); Mat retumage; //中值滤波 medianBlur(srcimage,retumage,5); //Mat转QImage 像素 newlabel放置图像处理后图片 QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888); disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height()); ui->newlabel->setPixmap(QPixmap::fromImage(disimage2)); } //毛玻璃 void Widget::on_pushButton_4_clicked() { //读取原始图片 Mat srcimage = imread("D:/000imageopencv/efls111.jpg"); //Mat转QImage 颜色 cvtColor(srcimage,srcimage,CV_BGR2RGB); //Mat转QImage 像素 oldlabel放置原图 QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height()); ui->oldlabel->setPixmap(QPixmap::fromImage(disimage)); //毛玻璃 RNG rng; int random; int num = 5; for(int i=0;i<srcimage.rows -num;i++) { for(int j=0;j<srcimage.cols -num;j++) { //通过rng返回0-15随机数 random = rng.uniform(0,num); srcimage.at<Vec3b>(i,j)[0] = srcimage.at<Vec3b>(i+random,j+random)[0]; srcimage.at<Vec3b>(i,j)[1] = srcimage.at<Vec3b>(i+random,j+random)[1]; srcimage.at<Vec3b>(i,j)[2] = srcimage.at<Vec3b>(i+random,j+random)[2]; } } //Mat转QImage 像素 newlabel放置图像处理后图片 QImage disimage2 = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height()); ui->newlabel->setPixmap(QPixmap::fromImage(disimage2)); } //灰度化 void Widget::on_pushButton_5_clicked() { //读取原始图片 Mat srcimage = imread("D:/000imageopencv/efls111.jpg"); //Mat转QImage 颜色 cvtColor(srcimage,srcimage,CV_BGR2RGB); //Mat转QImage 像素 oldlabel放置原图 QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height()); ui->oldlabel->setPixmap(QPixmap::fromImage(disimage)); Mat retumage; //灰度处理 灰度是单通道8位 QImage是24位三通道 cvtColor(srcimage,retumage,CV_BGR2GRAY); cvtColor(retumage,retumage,CV_GRAY2BGR); //Mat转QImage 像素 newlabel放置图像处理后图片 QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888); disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height()); ui->newlabel->setPixmap(QPixmap::fromImage(disimage2)); } //XY方向模糊 void Widget::on_pushButton_6_clicked() { //读取原始图片 Mat srcimage = imread("D:/000imageopencv/efls111.jpg"); //Mat转QImage 颜色 cvtColor(srcimage,srcimage,CV_BGR2RGB); //Mat转QImage 像素 oldlabel放置原图 QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height()); ui->oldlabel->setPixmap(QPixmap::fromImage(disimage)); Mat retumage; //xy轴模糊 blur(srcimage,retumage,Size(10,10)); //Mat转QImage 像素 newlabel放置图像处理后图片 QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888); disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height()); ui->newlabel->setPixmap(QPixmap::fromImage(disimage2)); } //双边模糊 void Widget::on_pushButton_7_clicked() { //读取原始图片 Mat srcimage = imread("D:/000imageopencv/efls111.jpg"); //Mat转QImage 颜色 cvtColor(srcimage,srcimage,CV_BGR2RGB); //Mat转QImage 像素 oldlabel放置原图 QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height()); ui->oldlabel->setPixmap(QPixmap::fromImage(disimage)); Mat retumage; //双倍模糊 cv::bilateralFilter(srcimage,retumage,15,120,10,4); //Mat转QImage 像素 newlabel放置图像处理后图片 QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888); disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height()); ui->newlabel->setPixmap(QPixmap::fromImage(disimage2)); } //腐蚀 void Widget::on_pushButton_8_clicked() { //读取原始图片 Mat srcimage = imread("D:/000imageopencv/efls111.jpg"); //Mat转QImage 颜色 cvtColor(srcimage,srcimage,CV_BGR2RGB); //Mat转QImage 像素 oldlabel放置原图 QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888); disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height()); ui->oldlabel->setPixmap(QPixmap::fromImage(disimage)); Mat retumage; //腐蚀 Mat element = cv::getStructuringElement(MORPH_RECT,Size(5,5)); cv::erode(srcimage,retumage,element); //Mat转QImage 像素 newlabel放置图像处理后图片 QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888); disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height()); ui->newlabel->setPixmap(QPixmap::fromImage(disimage2)); }
主入口Qt窗口显示
#include "widget.h" #include <QApplication> int main(int argc, char *argv[]) { QApplication a(argc, argv); Widget w; w.show(); return a.exec(); }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。