I am trying to use opencv for simple image capture and saving the image. I am fairly new to OPENCV and currently using 2.4.11 version.
It has been noted whenever i close my camera and open it - i notice memory leak and thread count increase in windows resource monitor.However, if i open my camera once and capture images i do not notice leak in the system. so i doubt videocapture. Request some lights in addressing this leak.
However, after fixing this leak will have to create a CPP wrapper to access api via C
Platform : Win 7 32 bit compiler : Mingw Gcc OPenCv : 2.4.11
#include <iostream>
#include <stdio.h>
using namespace std;
#include "cameraCore.h"
#include "opencv2/highgui/highgui.hpp"
#include <windows.h>
using namespace cv;
VideoCapture *cap = NULL;
int cameraClass::closeCamhandle()
{
try
{
if(cap != NULL)
{
if (cap->isOpened()) // if not success, exit program
{
cap->release();
//return 0;
}
delete(cap);
cap = NULL;
}
return 0;
}
catch ( cv::Exception &e )
{
const char* err_msg = e.what();
cout << "exception caught: " << err_msg << endl;
}
return 0;
}
bool cameraClass::setCamhandle(int camId)
{
try
{
bool bSuccess= FALSE;
cap=new VideoCapture();
bSuccess=cap->open(camId);
if(bSuccess == TRUE)
{
cout << "!!!Camera open success!!!" << endl;
}else{
cout << "!!!Camera open FASILURE!!!" << endl;
}
return bSuccess;
}
catch ( cv::Exception & e )
{
const char* err_msg = e.what();
cout << "exception caught: " << err_msg << endl;
}
return FALSE;
}
int cameraClass::captureImage(char *imageName, int roatation)
{
try
{
cout << "ImageName " << imageName << endl;
char image[50] ={0};
if (strlen(imageName) > 1 )
{
strcpy(image,imageName);
}
bool bSuccess= FALSE;
if (!cap->isOpened()) // if not success, exit program
{
cout << "Cannot open the video file" << endl;
return -1;
}
double dWidth = cap->get(CV_CAP_PROP_FRAME_WIDTH); //get the width of frames of the video
double dHeight = cap->get(CV_CAP_PROP_FRAME_HEIGHT); //get the height of frames of the video
cout << "Frame size : " << dWidth << " x " << dHeight << endl;
if (dWidth != frameWidth)
{
cap->set(CV_CAP_PROP_FRAME_WIDTH,frameWidth);
}
if (dHeight != frameHeight)
{
cap->set(CV_CAP_PROP_FRAME_HEIGHT,frameHeight);
}
Mat *frame = new Mat;
int frameCount = 20;
while (!bSuccess && frameCount)
{
cout << "Data for fame missing " << frameCount << endl;
bSuccess = cap->grab();
if(bSuccess)
bSuccess = cap->retrieve(*frame, 0);
if(bSuccess)
break;
frameCount--;
Sleep(5);
}
if (!bSuccess) //if not succes->, break loop
{
cout << "Cannot read a frame from video file" << endl;
frame->release();
delete(frame);
return -2;
}
bSuccess=imwrite(image,*frame);
frame->release();
delete(frame);
return 0;
}
catch ( cv::Exception & e )
{
const char* err_msg = e.what();
cout << "exception caught: " << err_msg << endl;
}
return 0;
}
int main()
{
int camOpenStatus = FALSE;
int status=0;
cameraClass *newCamHandle = new cameraClass(status=newCamHandle->setCamhandle(0);
int captureCount=1;
int failCount=0;
char name[30] = {0};
while (captureCount != 678)
{
if(captureCount % 13 == 0 || camOpenStatus == FALSE)
{
cout << "!!!Cam handle success!!!" << endl; // prints !!!Hello World!!!
newCamHandle->closeCamhandle();
Sleep(1*1000);
status=newCamHandle->setCamhandle(0);
if(status == TRUE)
{
cout << "!!!Cam handle success!!!" << endl; // prints !!!Hello World!!!
camOpenStatus=TRUE;
}
else
{
cout << "!!!CAM handle failure!!!" << endl; // prints !!!Hello World!!!
}
}
if(captureCount % 4 == 0)
Sleep(10*1000);
sprintf(name,"photo%d.jpg",captureCount);
status = newCamHandle->captureImage(name,0);
if(status == 0)
{
cout << "!!!CIamge capture success!!!" << endl; // prints !!!Hello World!!!
}
else
{
cout << "!!!CIamge capture failure!!!" << endl; // prints !!!Hello World!!!
failCount++;
if(failCount>2)
break;
}
Sleep(0.6*1000);
captureCount++;
}
newCamHandle->closeCamhandle();
delete(newCamHandle);
Sleep(30*1000);
return 0;
}
Header file
#ifndef CAMERACLASS_H_
#define CAMERACLASS_H_
//#include "opencv2/highgui/highgui.hpp"
//#include "opencv2/highgui/highgui.hpp"
//using namespace cv;
class cameraClass
{
public:
//VideoCapture cap;
int frameWidth;
int frameHeight;
int cameraModule;
cameraClass()
{
cameraModule=0;
frameWidth=320;
frameHeight=240;
}
cameraClass(int cameraModel)
{
cameraModule=cameraModel;
frameWidth=320;
frameHeight=240;
}
cameraClass( int frameWid, int frameHght)
{
frameWidth=frameWid;
frameHeight=frameHght;
}
cameraClass(int camModel, int frameWid, int frameHght)
{
cameraModule=camModel;
frameWidth=frameWid;
frameHeight=frameHght;
}
int captureImage(char *imageName, int roatation);
bool setCamhandle(int camId);
int closeCamhandle();
};
#endif /* CAMERACLASS_H_ */