我在尝试使用我的 basler cam 使 opencv 人脸检测在 QT 中工作时遇到了一些麻烦;我尝试了许多不同的方法来让它工作,使用许多不同的在线示例代码。我似乎根本无法让它工作;此外,我所做的尝试降低了我的帧率。
我用来使用 basler cam 拍摄视频的代码运行良好,我只是在实现人脸检测部分时遇到了问题。我将在下面粘贴我目前为相机和 opencv 编写的代码。代码确实让我时不时出现几个红框,但它并不稳定。我也遇到了这个错误
Failed to load OpenCL runtime
我不确定我做错了什么,也有没有办法在不降低帧率的情况下实现人脸检测,因为它已经很慢了
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <opencv2/opencv.hpp>
#include <pylon/PylonIncludes.h>
//#include <pylon/PylonGUI.h>
//#ifdef PYLON_WIN_BUILD
//#include <pylon/PylonGUI.h>
//#endif
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/core/core.hpp"
#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <iostream>
#include<time.h>
#include<stdlib.h>
using namespace cv;
// Namespace for using pylon objects.
using namespace Pylon;
// Namespace for using cout.
using namespace std;
static const uint32_t c_countOfImagesToGrab = 100;
cv::CascadeClassifier faceCade;
String faceCascadeName = "/usr/share/OpenCV/haarcascades/haarcascade_frontalface_alt.xml";
String FaceDetectWindow = "Face Detector Window";
String FaceDetectGrayWindow = "Face Detector Gray Window";
size_t i;
vector<Rect> faces;
cv::Mat camFrames, grayFrames;
int main()
{
// The exit code of the sample application.
int exitCode = 0;
// Automagically call PylonInitialize and PylonTerminate to ensure
// the pylon runtime system is initialized during the lifetime of this object.
Pylon::PylonAutoInitTerm autoInitTerm;
faceCade.load( faceCascadeName );
CGrabResultPtr ptrGrabResult;
namedWindow("CV_Image",WINDOW_AUTOSIZE);
CInstantCamera camera( CTlFactory::GetInstance().CreateFirstDevice());
cout << "Using device " << camera.GetDeviceInfo().GetModelName() << endl;
camera.Open();
GenApi::CIntegerPtr width(camera.GetNodeMap().GetNode("Width"));
GenApi::CIntegerPtr height(camera.GetNodeMap().GetNode("Height"));
Mat cv_img(width->GetValue(), height->GetValue(), CV_8UC3);
camera.StartGrabbing();
CPylonImage image;
CImageFormatConverter fc;
fc.OutputPixelFormat = PixelType_BGR8packed;
while(camera.IsGrabbing()){
camera.RetrieveResult( 5000, ptrGrabResult, TimeoutHandling_ThrowException);
if (ptrGrabResult->GrabSucceeded()){
fc.Convert(image, ptrGrabResult);
cv_img = cv::Mat(ptrGrabResult->GetHeight(), ptrGrabResult->GetWidth(), CV_8UC3,(uint8_t*)image.GetBuffer());
//cvtColor(cv_img, grayFrames, cv::COLOR_BGR2GRAY);
//equalizeHist(grayFrames, grayFrames);
faceCade.detectMultiScale(cv_img, faces, 1.1, 2, 0, Size(160, 160));
for (int i = 0; i < faces.size(); i++)
{
//Mat faceROI = grayFrames(faces[i]);
rectangle(cv_img, Rect(faces[i].x - 25,faces[i].y - 25,faces[i].width + 35 ,faces[i].height + 35), Scalar(0, 0, 255), 1, 1, 0);
Point center(faces[i].x + faces[i].width * 0.5,faces[i].y + faces[i].height * 0.5);
}
imshow("CV_Image",cv_img);
//imshow("FaceDetectGrayWindow", grayFrames);
waitKey(1);
if(waitKey(30)==27){
camera.StopGrabbing();
}
}
}
}
}
谢谢
最佳答案
我对此不太确定,但detectMultiScale
函数适用于 cv_8u 类型的图像,而且我看到您使用的是 cv_8uc3,据我所知,cv_8u 是具有 1 个 channel 的 8 位像素,cv_8uc3它也是 8 位,但有 3 个 channel ,您需要将图像转换为灰度,我看到您这样做了,但您发表评论了吗?!!!
查看此链接 opencv_face_detection .
也许这会解决你的问题,有些人建议你安装 opencl
sudo apt-get install ocl-icd-opencl-dev
关于c++ - 如何以及在何处使用带有 QT 的 basler 相机实现 opencv 人脸检测代码,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45882786/