[英]Background substraction using opencv mogdetector and c++ from live camera feed
我正在嘗試將此代碼用於實時攝像機饋送的背景減法。 但是這段代碼在兩個窗口都給出了白色圖像。 問題是,當使用來自同一相機的視頻文件進行測試時,它工作正常,沒有任何錯誤,但當視頻文件被相機輸入替換時,它變為白色,並且在運行的窗口終端中顯示錯誤:
HIGHGUI錯誤:V4L2:無法獲取屬性(1) - 參數無效
從攝像機饋送中取出視頻時,會不斷重復上述錯誤。 請幫忙解決這個問題。
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/video/background_segm.hpp>
#include <cv.h>
#include <iostream>
#include <sstream>
using namespace cv;
using namespace std;
Mat frame; //current frame
Mat fgMaskMOG; //fg mask generated by MOG method
Mat fgMaskMOG2; //fg mask fg mask generated by MOG2 method
Ptr<BackgroundSubtractor> pMOG; //MOG Background subtractor
Ptr<BackgroundSubtractor> pMOG2; //MOG2 Background subtractor
int keyboard;
int main()
{
//create GUI windows
namedWindow("Frame",0);
//namedWindow("FG Mask MOG",0);
namedWindow("FG Mask MOG 2",0);
namedWindow("eroded",0);
namedWindow("eroded2",0);
//create Background Subtractor objects
pMOG= new BackgroundSubtractorMOG(); //MOG approach
pMOG2 = new BackgroundSubtractorMOG2(); //MOG2 approach
//create the capture object
VideoCapture capture(0);
//read input data. ESC or 'q' for quitting
while( (char)keyboard != 'q' && (char)keyboard != 27 )
{
//read the current frame
if(!capture.read(frame))
{
cerr << "Unable to read next frame." << endl;
cerr << "Exiting..." << endl;
exit(EXIT_FAILURE);
}
//update the background model
//AND HERE!!!
//pMOG->operator()(frame, fgMaskMOG);
pMOG2->operator()(frame, fgMaskMOG2);
//get the frame number and write it on the current frame
stringstream ss;
rectangle(frame, cv::Point(10, 2), cv::Point(100,20),
cv::Scalar(255,255,255), -1);
ss << capture.get(CV_CAP_PROP_POS_FRAMES);
string frameNumberString = ss.str();
putText(frame, frameNumberString.c_str(), cv::Point(15, 15),
FONT_HERSHEY_SIMPLEX, 0.5 , cv::Scalar(0,0,0));
//show the current frame and the fg masks
imshow("Frame", frame);
imshow("FG Mask MOG", fgMaskMOG);
imshow("FG Mask MOG 2", fgMaskMOG2);
//get the input from the keyboard
keyboard = waitKey( 30 );
}
//delete capture object
capture.release();
//destroy GUI windows
distroyAllWindows();
return EXIT_SUCCESS;
}
我認為財產
CV_CAP_PROP_POS_FRAMES
對相機無效。
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