• 【OpenCV + Qt】 图像处理操作

    目录

    一：目标

    二：使用Qt界面

    三：图像处理操作完整代码

    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 

    1. #ifndef WIDGET_H
    2. #define WIDGET_H
    3. #include
    4. #include 
    5. using namespace cv;
    6.  
    7. QT_BEGIN_NAMESPACE
    8. namespace Ui {class Widget;}
    9. QT_END_NAMESPACE
    10.  
    11. class Widget : public QWidget
    12. {
    13.     Q_OBJECT
    14. public:
    15. //  Widget(QWidget *parent = nullptr);
    16.     explicit Widget(QWidget *parent = 0);
    17.     ~Widget();
    18.  
    19. private slots:
    20.     void on_pushButton_clicked();//雪花屏
    21.     void on_pushButton_2_clicked();//高斯模糊
    22.     void on_pushButton_3_clicked();//中值滤波
    23.     void on_pushButton_4_clicked();//毛玻璃
    24.     void on_pushButton_5_clicked();//灰度化
    25.     void on_pushButton_6_clicked();//XY方向模糊
    26.     void on_pushButton_7_clicked();//双边模糊
    27.     void on_pushButton_8_clicked();//腐蚀
    28. private:
    29.     Ui::Widget *ui;
    30.     Mat srcimage;//原图
    31. };
    32.  
    33. #endif // WIDGET_H

    源文件中实现图像处理方法 

    1. #include "widget.h"
    2. #include "ui_widget.h"
    3.  
    4. Widget::Widget(QWidget *parent) :
    5.     QWidget(parent),
    6.     ui(new Ui::Widget)
    7. {
    8.     ui->setupUi(this);
    9. }
    10.  
    11. Widget::~Widget()
    12. {
    13.     delete ui;
    14. }
    15.  
    16. //雪花屏
    17. void Widget::on_pushButton_clicked()
    18. {
    19.     //读取原始图片
    20.     Mat srcimage = imread("D:/000imageopencv/efls111.jpg");
    21.     //Mat转QImage 颜色
    22.     cvtColor(srcimage,srcimage,CV_BGR2RGB);
    23.     //Mat转QImage 像素   oldlabel放置原图
    24.     QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    25.     disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height());
    26.     ui->oldlabel->setPixmap(QPixmap::fromImage(disimage));
    27.  
    28.     //像素二维矩阵函数
    29.     int rows = srcimage.rows;
    30.     //像素二维矩阵列数
    31.     int cols = srcimage.cols * srcimage.channels();
    32.     for(int i=0;i
    33.     {
    34.         uchar * data = srcimage.ptr(i);
    35.         for(int j=0;j
    36.         {
    37.             //雪花屏特效
    38.             int q = rand()%cols;
    39.             data[q]=155;//某些通道随机改成155
    40.         }
    41.     }
    42.     //Mat转QImage 像素   newlabel放置图像处理后图片
    43.     QImage disimage2 = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    44.     disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height());
    45.     ui->newlabel->setPixmap(QPixmap::fromImage(disimage2));
    46. }
    47.  
    48. //高斯模糊
    49. void Widget::on_pushButton_2_clicked()
    50. {
    51.     //读取原始图片
    52.     Mat srcimage = imread("D:/000imageopencv/efls111.jpg");
    53.     //Mat转QImage 颜色
    54.     cvtColor(srcimage,srcimage,CV_BGR2RGB);
    55.     //Mat转QImage 像素   oldlabel放置原图
    56.     QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    57.  
    58.     Mat retimage;
    59.     //高斯模糊
    60.     GaussianBlur(srcimage,retimage,Size(5,5),0,0);
    61.  
    62.     //Mat转QImage 像素   newlabel放置图像处理后图片
    63.     QImage disimage2 = QImage(retimage.data,retimage.cols,retimage.rows,retimage.cols*retimage.channels(),QImage::Format_RGB888);
    64.     disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height());
    65.     ui->newlabel->setPixmap(QPixmap::fromImage(disimage2));
    66. }
    67.  
    68. //中值滤波
    69. void Widget::on_pushButton_3_clicked()
    70. {
    71.     //读取原始图片
    72.     Mat srcimage = imread("D:/000imageopencv/efls111.jpg");
    73.     //Mat转QImage 颜色
    74.     cvtColor(srcimage,srcimage,CV_BGR2RGB);
    75.     //Mat转QImage 像素   oldlabel放置原图
    76.     QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    77.     disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height());
    78.     ui->oldlabel->setPixmap(QPixmap::fromImage(disimage));
    79.  
    80.     Mat retumage;
    81.     //中值滤波
    82.     medianBlur(srcimage,retumage,5);
    83.  
    84.     //Mat转QImage 像素   newlabel放置图像处理后图片
    85.     QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888);
    86.     disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height());
    87.     ui->newlabel->setPixmap(QPixmap::fromImage(disimage2));
    88. }
    89.  
    90. //毛玻璃
    91. void Widget::on_pushButton_4_clicked()
    92. {
    93.     //读取原始图片
    94.     Mat srcimage = imread("D:/000imageopencv/efls111.jpg");
    95.     //Mat转QImage 颜色
    96.     cvtColor(srcimage,srcimage,CV_BGR2RGB);
    97.     //Mat转QImage 像素   oldlabel放置原图
    98.     QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    99.     disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height());
    100.     ui->oldlabel->setPixmap(QPixmap::fromImage(disimage));
    101.  
    102.     //毛玻璃
    103.     RNG rng;
    104.     int random;
    105.     int num = 5;
    106.     for(int i=0;i
    107.     {
    108.         for(int j=0;j
    109.         {
    110.             //通过rng返回0-15随机数
    111.             random = rng.uniform(0,num);
    112.             srcimage.at(i,j)[0] = srcimage.at(i+random,j+random)[0];
    113.             srcimage.at(i,j)[1] = srcimage.at(i+random,j+random)[1];
    114.             srcimage.at(i,j)[2] = srcimage.at(i+random,j+random)[2];
    115.         }
    116.     }
    117.  
    118.     //Mat转QImage 像素   newlabel放置图像处理后图片
    119.     QImage disimage2 = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    120.     disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height());
    121.     ui->newlabel->setPixmap(QPixmap::fromImage(disimage2));
    122. }
    123.  
    124. //灰度化
    125. void Widget::on_pushButton_5_clicked()
    126. {
    127.     //读取原始图片
    128.     Mat srcimage = imread("D:/000imageopencv/efls111.jpg");
    129.     //Mat转QImage 颜色
    130.     cvtColor(srcimage,srcimage,CV_BGR2RGB);
    131.     //Mat转QImage 像素   oldlabel放置原图
    132.     QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    133.     disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height());
    134.     ui->oldlabel->setPixmap(QPixmap::fromImage(disimage));
    135.  
    136.     Mat retumage;
    137.     //灰度处理 灰度是单通道8位 QImage是24位三通道
    138.     cvtColor(srcimage,retumage,CV_BGR2GRAY);
    139.     cvtColor(retumage,retumage,CV_GRAY2BGR);
    140.  
    141.     //Mat转QImage 像素   newlabel放置图像处理后图片
    142.     QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888);
    143.     disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height());
    144.     ui->newlabel->setPixmap(QPixmap::fromImage(disimage2));
    145. }
    146.  
    147. //XY方向模糊
    148. void Widget::on_pushButton_6_clicked()
    149. {
    150.     //读取原始图片
    151.     Mat srcimage = imread("D:/000imageopencv/efls111.jpg");
    152.     //Mat转QImage 颜色
    153.     cvtColor(srcimage,srcimage,CV_BGR2RGB);
    154.     //Mat转QImage 像素   oldlabel放置原图
    155.     QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    156.     disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height());
    157.     ui->oldlabel->setPixmap(QPixmap::fromImage(disimage));
    158.  
    159.     Mat retumage;
    160.     //xy轴模糊
    161.     blur(srcimage,retumage,Size(10,10));
    162.  
    163.     //Mat转QImage 像素   newlabel放置图像处理后图片
    164.     QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888);
    165.     disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height());
    166.     ui->newlabel->setPixmap(QPixmap::fromImage(disimage2));
    167. }
    168.  
    169. //双边模糊
    170. void Widget::on_pushButton_7_clicked()
    171. {
    172.     //读取原始图片
    173.     Mat srcimage = imread("D:/000imageopencv/efls111.jpg");
    174.     //Mat转QImage 颜色
    175.     cvtColor(srcimage,srcimage,CV_BGR2RGB);
    176.     //Mat转QImage 像素   oldlabel放置原图
    177.     QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    178.     disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height());
    179.     ui->oldlabel->setPixmap(QPixmap::fromImage(disimage));
    180.  
    181.     Mat retumage;
    182.     //双倍模糊
    183.     cv::bilateralFilter(srcimage,retumage,15,120,10,4);
    184.  
    185.     //Mat转QImage 像素   newlabel放置图像处理后图片
    186.     QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888);
    187.     disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height());
    188.     ui->newlabel->setPixmap(QPixmap::fromImage(disimage2));
    189. }
    190.  
    191. //腐蚀
    192. void Widget::on_pushButton_8_clicked()
    193. {
    194.     //读取原始图片
    195.     Mat srcimage = imread("D:/000imageopencv/efls111.jpg");
    196.     //Mat转QImage 颜色
    197.     cvtColor(srcimage,srcimage,CV_BGR2RGB);
    198.     //Mat转QImage 像素   oldlabel放置原图
    199.     QImage disimage = QImage(srcimage.data,srcimage.cols,srcimage.rows,srcimage.cols*srcimage.channels(),QImage::Format_RGB888);
    200.     disimage = disimage.scaled(ui->oldlabel->width(),ui->oldlabel->height());
    201.     ui->oldlabel->setPixmap(QPixmap::fromImage(disimage));
    202.  
    203.     Mat retumage;
    204.     //腐蚀
    205.     Mat element = cv::getStructuringElement(MORPH_RECT,Size(5,5));
    206.     cv::erode(srcimage,retumage,element);
    207.  
    208.     //Mat转QImage 像素   newlabel放置图像处理后图片
    209.     QImage disimage2 = QImage(retumage.data,retumage.cols,retumage.rows,retumage.cols*retumage.channels(),QImage::Format_RGB888);
    210.     disimage2 = disimage2.scaled(ui->newlabel->width(),ui->newlabel->height());
    211.     ui->newlabel->setPixmap(QPixmap::fromImage(disimage2));
    212. }

    主入口Qt窗口显示 

    1. #include "widget.h"
    2. #include 
    3.  
    4. int main(int argc, char *argv[])
    5. {
    6.     QApplication a(argc, argv);
    7.     Widget w;
    8.     w.show();
    9.     return a.exec();
    10. }
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  • 原文地址：https://blog.csdn.net/m0_56051805/article/details/126132310