做尾货的网站,网站建设公司网站源码,微信公众号排版app,wordpress googlevis 嵌入前言 本篇文档的demo包含了 1.使用OpenCV对图像进行处理#xff0c;对图像进行置灰#xff0c;旋转#xff0c;抠图#xff0c;高斯模糊#xff0c;中值滤波#xff0c;部分区域清除置黑#xff0c;背景移除#xff0c;边缘检测等操作#xff1b;2.单纯使用opencv播放…前言 本篇文档的demo包含了 1.使用OpenCV对图像进行处理对图像进行置灰旋转抠图高斯模糊中值滤波部分区域清除置黑背景移除边缘检测等操作2.单纯使用opencv播放显示视频3.使用opencv和openGL播放显示视频4.在ffmpeg解码后使用opencv显示视频并支持对视频的旋转翻转、裁剪、添加文字、添加logo、亮度调节、置灰、录像截图音频开关等功能。视频播放器同时支持本地文件与网络码流地址的播放。本篇博客的最后有提供工程代码的下载。
一、OpenCV简单介绍 OpenCV是一个基于Apache2.0许可开源发行的跨平台计算机视觉和机器学习软件库可以运行在Linux、Windows、Android和Mac OS操作系统上。它由一系列 C 函数和少量 C 类构成同时提供了Python、Ruby、MATLAB等语言的接口实现了图像处理和计算机视觉方面的很多通用算法。应用领域包含人机互动、物体识别、图像分割、人脸识别、动作识别、运动跟踪、机器人、运动分析、机器视觉、结构分析、汽车安全驾驶等。
二、demo调用OpenCV 本篇demo使用的是OpenCV-4.5.1, 是直接下载windows版本没有额外去编译OpenCV的库安装exe后提取头文件和相关的库文件用于工程调用即可。OpenCV下载路径https://sourceforge.net/projects/opencvlibrary/ OpenCV常用函数介绍 1Mat Image imread(filename); //从指定文件加载图像并返回 2namedWindow(“IMG-WIN”, cv::WINDOW_NORMAL);//创建图像显示窗口 3destroyWindow(“IMG-WIN”);//销毁图像显示窗口 4imshow(“IMG-WIN”, Image);//将图片显示在窗口中 5imwrite将图像保存到指定文件 6其他
三、demo功能介绍
3.1.图像操作 图像操作包含了显示原图、置灰、旋转、抠图、高斯模糊、中值滤波部分区域清除置黑背景移除边缘检测等操作。点击显示原图后通过点击其他按钮可以实现图像的不同效果例如置灰 其他功能可下载demo进行操作点击显示原图可恢复到之前图片显示点击保存图片按钮可将处理后的图片进行保存。
3.2.图像操作相关代码
//图像操作
/
void MainWindow::on_pushButton_showImage_clicked()
{// load image using opencvm_srcImage imread(./Image/test1.jpg);std::string winName Display window;namedWindow(winName, WINDOW_AUTOSIZE);imshow(winName, m_srcImage);if(m_bShowImage false){HWND hwnd static_castHWND(cvGetWindowHandle(winName.c_str()));HWND parent GetParent(hwnd);//得到nameWindow窗口的父句柄SetParent(hwnd, (HWND)ui-widget_image-winId());//设置ui控件的句柄是父句柄ShowWindow(parent, SW_HIDE);//隐藏掉nameWindow窗口resizeWindow(winName, cv::Size(ui-widget_image-width(), ui-widget_image-height()));}m_destImage m_srcImage;m_bShowImage true;
}void MainWindow::on_pushButton_saveImage_clicked()
{if(m_bShowImage){std::string saveFile ./Image/test-new.jpg;if(imwrite(saveFile, m_destImage)){QMessageBox::information(this, myOpencv, Save Image Success.);}else{QMessageBox::critical(this, myOpencv, Save Image Failed.);}}elseQMessageBox::critical(this, myOpencv, Please click on the Show Original Image button first.);
}void MainWindow::on_pushButton_gray_clicked()
{if(m_bShowImage){cvtColor(m_srcImage, m_destImage, COLOR_BGR2GRAY);std::string winName Display window;namedWindow(winName, WINDOW_AUTOSIZE);imshow(winName, m_destImage);}elseQMessageBox::critical(this, myOpencv, Please click on the Show Original Image button first.);
}void MainWindow::on_pushButton_rotate_clicked()
{if(m_bShowImage){warpAffine(m_srcImage, m_destImage, getRotationMatrix2D({m_srcImage.cols/2.0f, m_srcImage.rows/2.0f},45,0.5),m_srcImage.size(),cv::INTER_LINEAR, cv::BORDER_CONSTANT, {255,0,0});std::string winName Display window;namedWindow(winName, WINDOW_AUTOSIZE);imshow(winName, m_destImage);}elseQMessageBox::critical(this, myOpencv, Please click on the Show Original Image button first.);
}void MainWindow::on_pushButton_matting_clicked()
{if(m_bShowImage){m_destImage m_srcImage({20, 20, 60, 60}).clone();std::string winName Display window;namedWindow(winName, WINDOW_AUTOSIZE);imshow(winName, m_destImage);}elseQMessageBox::critical(this, myOpencv, Please click on the Show Original Image button first.);
}void MainWindow::on_pushButton_gauss_clicked()
{if(m_bShowImage){GaussianBlur(m_srcImage, m_destImage, cv::Size(5,5), 0);std::string winName Display window;namedWindow(winName, WINDOW_AUTOSIZE);imshow(winName, m_destImage);}elseQMessageBox::critical(this, myOpencv, Please click on the Show Original Image button first.);
}void MainWindow::on_pushButton_median_clicked()
{if(m_bShowImage){medianBlur(m_srcImage, m_destImage, 5);std::string winName Display window;namedWindow(winName, WINDOW_AUTOSIZE);imshow(winName, m_destImage);}elseQMessageBox::critical(this, myOpencv, Please click on the Show Original Image button first.);
}void MainWindow::on_pushButton_clear_clicked()
{if(m_bShowImage){cv::Rect roi(40, 40, 80, 80);Mat roiMat m_destImage(roi);roiMat.setTo(cv::Scalar(0,0,0));std::string winName Display window;namedWindow(winName, WINDOW_AUTOSIZE);imshow(winName, m_destImage);}elseQMessageBox::critical(this, myOpencv, Please click on the Show Original Image button first.);
}void MainWindow::on_pushButton_clearBackground_clicked()
{//原图Mat image imread(./Image/test1.jpg);// 创建一个掩码mask用于指定哪些区域是前景哪些区域是背景cv::Mat mask(image.size(), CV_8UC1, cv::Scalar(cv::GC_BGD));cv::Rect rectangle(50, 50, image.cols - 100, image.rows - 100);cv::grabCut(image, mask, rectangle, cv::Mat(), cv::Mat(), 5, cv::GC_INIT_WITH_RECT);// 将掩码中被标记为前景的像素设为白色背景设为黑色cv::Mat foregroundMask (mask cv::GC_PR_FGD) | (mask cv::GC_FGD);cv::Mat foregroundImage(image.size(), CV_8UC3, cv::Scalar(0, 0, 0));image.copyTo(foregroundImage, foregroundMask);// 显示结果图像cv::imshow(Foreground, foregroundImage);cv::waitKey(0);
}void MainWindow::on_pushButton_edgeDetection_clicked()
{// 读取图片cv::Mat image cv::imread(./Image/test1.jpg, cv::IMREAD_GRAYSCALE);// 边缘检测cv::Mat edges;cv::Canny(image, edges, 100, 200);// 显示结果cv::imshow(Edges, edges);cv::waitKey(0);
}3.3.视频操作 代码中通过宏定义可以旋转不同的视频处理方式默认使用ffmpeg解码后opencv播放显示视频如下
#define OPENCV_PLAY_VIDEO 0 //单纯使用opencv播放显示视频
#define OPENCV_OPENGL_PLAY_VIDEO 0 //使用opencv和openGL播放显示视频
#define OPENCV_FFMPEG_PLAY_VIDEO 1 //使用ffmpeg解码后opencv显示视频播放器支持对视频的旋转翻转、裁剪、添加文字、添加logo、亮度调节、置灰、录像截图音频开关等功能同时支持本地文件与网络码流地址的播放。 简单演示如下 对原视频进行相关处理后可通过点击录像截图按钮进行视频与图片的保存。通过开关音频按钮支持对音频的播放处理。 demo工程中有提供测试视频和测试logo可以进行添加测试。
3.4.视频操作部分代码
void MainWindow::on_pushButton_Open_clicked()
{QString sFileName QFileDialog::getOpenFileName(this, QString::fromLocal8Bit(Select Video File));if(sFileName.isEmpty()){QMessageBox::critical(this, myOpencv, QObject::tr(错误:文件不能为空.));return;}ui-lineEdit_url-setText(sFileName);
}void MainWindow::on_pushButton_Play_clicked()
{QString sStreamAddr ui-lineEdit_url-text();if(sStreamAddr.isEmpty()){QMessageBox::critical(this, myOpencv, QObject::tr(错误:码流地址不能为空.));return;}#if OPENCV_FFMPEG_PLAY_VIDEOif(nullptr m_pMediaThread){MY_DEBUG new MediaThread;m_pMediaThread new MediaThread(ui-openGLWidget);}else{if(m_pMediaThread-isRunning()){QMessageBox::critical(this, myOpencv, 错误:请先点击停止按钮关闭视频.);return;}}bool bMediaInit m_pMediaThread-Init(sStreamAddr);if(bMediaInit){m_pMediaThread-startThread();}#elif OPENCV_PLAY_VIDEOif(m_pOpencvPlayThread1 nullptr){m_pOpencvPlayThread1 new COpencvPlayThread1(ui-openGLWidget, sStreamAddr);}m_pOpencvPlayThread1-startThread();#elif OPENCV_OPENGL_PLAY_VIDEOif(m_pOpencvPlayThread2 nullptr){m_pOpencvPlayThread2 new COpencvPlayThread2(ui-openGLWidget, sStreamAddr);}m_pOpencvPlayThread2-startThread();#endif}void MainWindow::on_pushButton_Stop_clicked()
{
#if OPENCV_PLAY_VIDEOif(m_pOpencvPlayThread1)m_pOpencvPlayThread1-stopThread();
#endif#if OPENCV_OPENGL_PLAY_VIDEOif(m_pOpencvPlayThread2)m_pOpencvPlayThread2-stopThread();
#endif#if OPENCV_FFMPEG_PLAY_VIDEOif(m_pMediaThread){disconnect(m_pMediaThread, SIGNAL(sig_emitImage(const QImage)),ui-openGLWidget, SLOT(slot_showImage(const QImage)));m_pMediaThread-stopThread();m_pMediaThread-quit();m_pMediaThread-wait();m_pMediaThread-DeInit();}
#endif}void MainWindow::on_pushButton_startRecord_clicked()
{if(m_pMediaThread)m_pMediaThread-startRecord();
}void MainWindow::on_pushButton_stopRecord_clicked()
{if(m_pMediaThread){m_pMediaThread-stopRecord();QDesktopServices::openUrl(QUrl::fromLocalFile(RECORD_DEFAULT_PATH));}
}void MainWindow::on_pushButton_snapshot_clicked()
{if(m_pMediaThread){m_pMediaThread-Snapshot();QDesktopServices::openUrl(QUrl::fromLocalFile(SNAPSHOT_DEFAULT_PATH));}
}void MainWindow::on_pushButton_video_rotate_clicked()
{if(m_pMediaThread){int nRotate ui-comboBox_rotate-currentIndex() - 1;if(nRotate 0)m_pMediaThread-setRotate(false, nRotate);elsem_pMediaThread-setRotate(true, nRotate);}
}void MainWindow::on_pushButton_video_overturn_clicked()
{if(m_pMediaThread){int nOverturn ui-comboBox_overturn-currentIndex() - 1;if(nOverturn 0)m_pMediaThread-setFlip(false, nOverturn);elsem_pMediaThread-setFlip(true, nOverturn);}
}bool bGrey false;
void MainWindow::on_pushButton_video_grey_clicked()
{if(m_pMediaThread){if(bGrey){m_pMediaThread-setGray(false);bGrey false;}else{m_pMediaThread-setGray(true);bGrey true;}}
}void MainWindow::on_pushButton_video_cropping_clicked()
{if(m_pMediaThread){int x ui-lineEdit_crop_X-text().toInt();int y ui-lineEdit_crop_Y-text().toInt();int w ui-lineEdit_crop_W-text().toInt();int h ui-lineEdit_crop_H-text().toInt();m_pMediaThread-setCrop(true, x, y, w, h);}
}void MainWindow::on_pushButton_video_addText_clicked()
{if(m_pMediaThread){int x ui-lineEdit_text_X-text().toInt();int y ui-lineEdit_text_Y-text().toInt();int nColor ui-comboBox_text_rgb-currentIndex();double size ui-comboBox_text_fonsize-currentText().toDouble();QString sText ui-lineEdit_videoText-text();MY_DEBUG size: size;m_pMediaThread-setAddText(true, sText, x, y, nColor, size);}
}void MainWindow::on_pushButton_logoPath_clicked()
{QString sFileName QFileDialog::getOpenFileName(this, QString::fromLocal8Bit(Select Logo File));if(sFileName.isEmpty()){QMessageBox::critical(this, myOpenCV, QObject::tr(错误:文件不能为空.));return;}ui-lineEdit_logo_path-setText(sFileName);
}void MainWindow::on_pushButton_addLogo_clicked()
{if(m_pMediaThread){int x ui-lineEdit_logo_X-text().toInt();int y ui-lineEdit_logo_Y-text().toInt();QString sAddLogoPath ui-lineEdit_logo_path-text();m_pMediaThread-setAddLogo(true, x, y, sAddLogoPath);}
}void MainWindow::on_pushButton_setBrightness_clicked()
{if(m_pMediaThread){double brightness ui-comboBox_brightnessVal-currentText().toDouble();m_pMediaThread-setImagePara(brightness);}
}void MainWindow::on_pushButton_restore_clicked()
{if(m_pMediaThread){int x ui-lineEdit_crop_X-text().toInt();int y ui-lineEdit_crop_Y-text().toInt();int w ui-lineEdit_crop_W-text().toInt();int h ui-lineEdit_crop_H-text().toInt();m_pMediaThread-setCrop(false, x, y, w, h);}
}void MainWindow::on_pushButto_video_deleteText_clicked()
{if(m_pMediaThread){int x ui-lineEdit_text_X-text().toInt();int y ui-lineEdit_text_Y-text().toInt();int nColor ui-comboBox_text_rgb-currentIndex();double size ui-comboBox_text_rgb-currentText().toDouble();QString sText ui-lineEdit_videoText-text();m_pMediaThread-setAddText(false, sText, x, y, nColor, size);}
}void MainWindow::on_pushButton_deleteLogo_clicked()
{if(m_pMediaThread){int x ui-lineEdit_logo_X-text().toInt();int y ui-lineEdit_logo_Y-text().toInt();QString sAddLogoPath ui-lineEdit_logo_path-text();m_pMediaThread-setAddLogo(false, x, y, sAddLogoPath);}
}void MainWindow::on_pushButton_audioOpen_clicked()
{ctAudioPlayer::getInstance().isPlay(true);
}void MainWindow::on_pushButton_audioClose_clicked()
{ctAudioPlayer::getInstance().isPlay(false);
}void ctFFmpeg::dealWithOpenCV(AVFrame *pFrame/*, int time*/)
{if(!m_bQuit){cv::Mat destCvMat(cv::Size(m_nVideoW, m_nVideoH), CV_8UC3, cv::Scalar(1, 2, 3));destCvMat.data (uchar*)pFrame-data[0];//旋转if(m_bRotate){MY_DEBUG Set Rotate m_nRotate: m_nRotate;rotate(destCvMat, destCvMat, m_nRotate);}//翻转if(m_bFlip){MY_DEBUG Set Flip;flip(destCvMat, destCvMat, m_nFlip);}//裁剪if(m_bCrop){destCvMat destCvMat(Rect(m_nCropX, m_nCropY, m_nCropW, m_nCropH));}//灰度if(m_bGray){MY_DEBUG Set Gray;cvtColor(destCvMat, destCvMat, COLOR_BGR2GRAY);}//添加文字if(m_bAddText){MY_DEBUG m_nAddTextX: m_nAddTextX , m_nAddTextY m_nAddTextY ,m_nAddTextSize: m_nAddTextSize;cv::Point ptPos(m_nAddTextX, m_nAddTextY);int fontFace cv::FONT_HERSHEY_COMPLEX;double fontScale m_nAddTextSize;int thickness 2;cv::Scalar color;switch(m_nAddTextColor){case ADD_TEXT_COLOR_TYPE_BLUE:color[0]255; color[1]0; color[2]0;cv::putText(destCvMat, m_sAddText.toStdString(), ptPos, fontFace, fontScale, color, thickness);break;case ADD_TEXT_COLOR_TYPE_GREEN:color[0]0; color[1]255; color[2]0;cv::putText(destCvMat, m_sAddText.toStdString(), ptPos, fontFace, fontScale, color, thickness);break;case ADD_TEXT_COLOR_TYPE_RED:default:color[0]0; color[1]0; color[2]255;//红色cv::putText(destCvMat, m_sAddText.toStdString(), ptPos, fontFace, fontScale, color, thickness);break;}}//添加logoif(m_bAddLogo){cv::Mat logoImage cv::imread(m_sAddLogoPath.toStdString());cv::Mat roi destCvMat(cv::Rect(m_nAddLogoX, m_nAddLogoY, logoImage.cols, logoImage.rows));cv::addWeighted(roi, 0.5, logoImage, 0.5, 0, roi);}//亮度\暗度cv::addWeighted(destCvMat, m_nBrightness, cv::Scalar(0, 0, 0), 0, 0, destCvMat);#if OPENCV_NAME_WINDOW_SHOWcv::imshow(m_sWinName.toStdString(), destCvMat);
#endif//效率太慢, 容易导致崩溃, 不适合转QImage再用openGL播放//...//emit sig_getImage(image);//截图if(m_bSnapshot){cv::cvtColor(destCvMat, destCvMat, cv::COLOR_BGR2RGB);QImage image(destCvMat.data, destCvMat.cols, destCvMat.rows, static_castint(destCvMat.step), QImage::Format_RGB888);QPixmap pixPicture QPixmap::fromImage(image);QString sPath ./snapshot/;QDate date QDate::currentDate();QTime time QTime::currentTime();m_sSnapPath QString(%1%2-%3-%4-%5%6%7.jpg).arg(sPath).arg(date.year()). \arg(date.month()).arg(date.day()).arg(time.hour()).arg(time.minute()). \arg(time.second());MY_DEBUG Snapshot... m_sSnapPath: m_sSnapPath;pixPicture.save(m_sSnapPath, jpg);m_bSnapshot false;}}
}四、工程源码下载
demo播放器下载https://download.csdn.net/download/linyibin_123/88217460
demo播放器工程源码下载https://download.csdn.net/download/linyibin_123/88217472
