Question

我最近在OpenCV中进行了一些循环检测，并取得了一些成功。下面的代码在32位平台上的C ++中运行得非常好。然而，我确实有一个小问题;当程序运行时，我的RAM负载继续加载。例如，当我启动程序时，我是250mb，30秒后，我大约是800mb。这继续并最终溢出到硬盘驱动器。我试图在while循环中移动cvReleaseCapture，但我只是得到旧的“内存位置的异常......”。我有什么想法可以清理它吗？非常感谢。这是代码：

#include "stdafx.h"
#include <cv.h>
#include <highgui.h>
#include <math.h>


int main( int argc, char **argv )
{
    CvCapture *capture = 0;
    IplImage  *img = 0;
    int       key = 0;
CvFont font;
cvInitFont(&font, CV_FONT_HERSHEY_PLAIN,1.0,1.0,0,1,CV_AA);

capture = cvCaptureFromCAM( 0 );

if ( !capture ) {
    fprintf( stderr, "Cannot open initialize webcam!\n" );
    return 1;
} 

cvNamedWindow( "result", CV_WINDOW_AUTOSIZE );

while( key != 'q' ) {
    img = cvQueryFrame( capture ); 
    IplImage* gray = cvCreateImage( cvGetSize(img), 8, 1 );
    CvMemStorage* storage = cvCreateMemStorage(0);
    cvCvtColor( img, gray, CV_BGR2GRAY );
    cvSmooth( gray, gray, CV_GAUSSIAN, 9, 9 );
    CvSeq* circles = cvHoughCircles( gray, storage, CV_HOUGH_GRADIENT, 2, gray-    >height/4, 200, 100, 20, 100 );
    int i;
    for( i = 0; i < circles->total; i++ )
    {
         float* p = (float*)cvGetSeqElem( circles, i );
         //cvCircle( img, cvPoint(cvRound(p[0]),cvRound(p[1])), 2, CV_RGB(0,255,0), -1, 8, 0 );
         cvCircle( img, cvPoint(cvRound(p[0]),cvRound(p[1])), cvRound(p[2]), CV_RGB(0,255,0), 2, 8, 0 );
         cvLine (img, cvPoint(cvRound(p[0]+40),cvRound(p[1])), cvPoint(cvRound(p[0]),cvRound(p[1])), CV_RGB(0,255,0), 1, CV_AA,0);
         cvLine (img, cvPoint(cvRound(p[0]),cvRound(p[1]+40)), cvPoint(cvRound(p[0]),cvRound(p[1])), CV_RGB(0,255,0), 1, CV_AA,0);
         cvLine (img, cvPoint(cvRound(p[0]-40),cvRound(p[1])), cvPoint(cvRound(p[0]),cvRound(p[1])), CV_RGB(0,255,0), 1, CV_AA,0);
         cvLine (img, cvPoint(cvRound(p[0]),cvRound(p[1]-40)), cvPoint(cvRound(p[0]),cvRound(p[1])), CV_RGB(0,255,0), 1, CV_AA,0);
         cvPutText(img, "Meow",cvPoint(cvRound(p[0]+45),cvRound(p[1]+45)), &font, CV_RGB(0,0,255)); 

    }


    if( !img ) break;       
    cvShowImage( "result", img ); 
    key = cvWaitKey( 1 );
    cvReleaseCapture( &capture );
}

cvDestroyWindow( "result" );
cvReleaseCapture( &capture );    

return 0;

}

Answer 1

摆脱while循环中的cvReleaseCapture。相反，你应该

cvReleaseMemStorage(storage);
cvReleaseImage(gray);

你可能应该移动if (!img) break;行，所以它显示为：

img = cvQueryFrame(capture);
if (!img) break;

修改

实际上，您应该在gray循环之外进行初始捕获（img = cvQueryFrame(capture);），而不是不断创建然后销毁while。然后以正常方式创建gray。然后你不必在while循环中继续创建它，这就是你内存不足的原因（你在每次迭代时创建一个新的图像而不释放它）。

所以

#include "stdafx.h" #include <cv.h> #include <highgui.h> #include <math.h> int main( int argc, char **argv ) { CvCapture *capture = 0; IplImage *img = 0; int key = 0; CvFont font; cvInitFont(&font, CV_FONT_HERSHEY_PLAIN,1.0,1.0,0,1,CV_AA); capture = cvCaptureFromCAM( 0 ); if ( !capture ) { fprintf( stderr, "Cannot open initialize webcam!\n" ); return 1; } cvNamedWindow( "result", CV_WINDOW_AUTOSIZE ); img = cvQueryFrame( capture ); if (!img) exit(1); IplImage* gray = cvCreateImage( cvGetSize(img), 8, 1 ); CvMemStorage* storage = cvCreateMemStorage(0); while( key != 'q' ) { img = cvQueryFrame( capture ); if( !img ) break; cvCvtColor( img, gray, CV_BGR2GRAY ); cvSmooth( gray, gray, CV_GAUSSIAN, 9, 9 ); CvSeq* circles = cvHoughCircles( gray, storage, CV_HOUGH_GRADIENT, 2, gray- >height/4, 200, 100, 20, 100 ); int i; for( i = 0; i < circles->total; i++ ) { float* p = (float*)cvGetSeqElem( circles, i ); //cvCircle( img, cvPoint(cvRound(p[0]),cvRound(p[1])), 2, CV_RGB(0,255,0), -1, 8, 0 ); cvCircle( img, cvPoint(cvRound(p[0]),cvRound(p[1])), cvRound(p[2]), CV_RGB(0,255,0), 2, 8, 0 ); cvLine (img, cvPoint(cvRound(p[0]+40),cvRound(p[1])), cvPoint(cvRound(p[0]),cvRound(p[1])), CV_RGB(0,255,0), 1, CV_AA,0); cvLine (img, cvPoint(cvRound(p[0]),cvRound(p[1]+40)), cvPoint(cvRound(p[0]),cvRound(p[1])), CV_RGB(0,255,0), 1, CV_AA,0); cvLine (img, cvPoint(cvRound(p[0]-40),cvRound(p[1])), cvPoint(cvRound(p[0]),cvRound(p[1])), CV_RGB(0,255,0), 1, CV_AA,0); cvLine (img, cvPoint(cvRound(p[0]),cvRound(p[1]-40)), cvPoint(cvRound(p[0]),cvRound(p[1])), CV_RGB(0,255,0), 1, CV_AA,0); cvPutText(img, "Meow",cvPoint(cvRound(p[0]+45),cvRound(p[1]+45)), &font, CV_RGB(0,0,255)); } cvShowImage( "result", img ); key = cvWaitKey( 1 ); } cvReleaseMemStorage(storage); cvReleaseImage(gray); cvDestroyWindow( "result" ); cvReleaseCapture( &capture ); return 0; }

Opencv Circle Detection - RAM加载

1 个答案: