道路上の車両を追跡するためにオプティカル フローを実装しましたが、非常に遅いことが判明しました。
私のコードは関数を使用しています:
- cvGoodFeaturesToTrack
- cvFindCornerSubPix
- cvCalcOpticalFlowPyrLK
この追跡を迅速かつ効率的にするにはどうすればよいですか?
私のコードは次のとおりです。
#include "highgui.h"
#include "cv.h"
#include "cxcore.h"
#include <iostream>
using namespace std;
const int MAX_CORNERS = 500;
int main()
{
CvCapture* capture=cvCreateFileCapture("E:\cam1.avi");
IplImage* img_A;// = cvLoadImage("image0.png", CV_LOAD_IMAGE_GRAYSCALE);
IplImage* img_B;// = cvLoadImage("image1.png", CV_LOAD_IMAGE_GRAYSCALE);
img_A=cvQueryFrame(capture);
IplImage* imgA = cvCreateImage( cvGetSize(img_A), 8, 1 );
IplImage* imgB = cvCreateImage( cvGetSize(img_A), 8, 1 );
cvNamedWindow( "ImageA", CV_WINDOW_AUTOSIZE );
cvNamedWindow( "ImageB", CV_WINDOW_AUTOSIZE );
cvNamedWindow( "LKpyr_OpticalFlow", CV_WINDOW_AUTOSIZE );
while(1)
{
int couter=0;
for(int k=0;k<20;k++)
{
img_B=cvQueryFrame(capture);
}
//cvCvtColor(imgA,imgA,CV_BGR2GRAY);
//cvCvtColor(imgB,imgB,CV_BGR2GRAY);
// Load two images and allocate other structures
/*IplImage* imgA = cvLoadImage("image0.png", CV_LOAD_IMAGE_GRAYSCALE);
IplImage* imgB = cvLoadImage("image1.png", CV_LOAD_IMAGE_GRAYSCALE);*/
CvSize img_sz = cvGetSize( img_A );
int win_size = 10;
IplImage* imgC = cvCreateImage( cvGetSize(img_A), 8, 1 );
cvZero(imgC);
// Get the features for tracking
IplImage* eig_image = cvCreateImage( img_sz, IPL_DEPTH_32F, 1 );
IplImage* tmp_image = cvCreateImage( img_sz, IPL_DEPTH_32F, 1 );
int corner_count = MAX_CORNERS;
CvPoint2D32f* cornersA = new CvPoint2D32f[ MAX_CORNERS ];
cvCvtColor(img_A,imgA,CV_BGR2GRAY);
cvCvtColor(img_B,imgB,CV_BGR2GRAY);
cvGoodFeaturesToTrack( imgA, eig_image, tmp_image, cornersA, &corner_count ,0.05, 5.0, 0, 3, 0, 0.04 );
cvFindCornerSubPix( imgA, cornersA, corner_count, cvSize( win_size, win_size ) ,cvSize( -1, -1 ), cvTermCriteria( CV_TERMCRIT_ITER | CV_TERMCRIT_EPS, 20, 0.03 ) );
// Call Lucas Kanade algorithm
char features_found[ MAX_CORNERS ];
float feature_errors[ MAX_CORNERS ];
CvSize pyr_sz = cvSize( imgA->width+8, imgB->height/3 );
IplImage* pyrA = cvCreateImage( pyr_sz, IPL_DEPTH_32F, 1 );
IplImage* pyrB = cvCreateImage( pyr_sz, IPL_DEPTH_32F, 1 );
CvPoint2D32f* cornersB = new CvPoint2D32f[ MAX_CORNERS ];
/*int jk=0;
for(int i=0;i<imgA->width;i+=10)
{
for(int j=0;j<imgA->height;j+=10)
{
cornersA[jk].x=i;
cornersA[jk].y=j;
++jk;
}
}
*/
cvCalcOpticalFlowPyrLK( imgA, imgB, pyrA, pyrB, cornersA, cornersB, corner_count,
cvSize( win_size, win_size ), 5, features_found, feature_errors,
cvTermCriteria( CV_TERMCRIT_ITER | CV_TERMCRIT_EPS, 20, 0.3 ), 0 );
// Make an image of the results
for( int i=0; i < corner_count; i++ )
{
if( features_found[i]==0|| feature_errors[i]>550 )
{
//printf("Error is %f/n",feature_errors[i]);
continue;
}
//printf("Got it/n");
CvPoint p0 = cvPoint( cvRound( cornersA[i].x ), cvRound( cornersA[i].y ) );
CvPoint p1 = cvPoint( cvRound( cornersB[i].x ), cvRound( cornersB[i].y ) );
cvLine( imgC, p0, p1, CV_RGB(255,0,0), 2 );
cout<<p0.x<<" "<<p0.y<<endl;
}
cvShowImage( "LKpyr_OpticalFlow", imgC );
cvShowImage( "ImageA", imgA );
cvShowImage( "ImageB", imgB );
//cvCopyImage(imgB,imgA);
delete[] cornersA;
delete[] cornersB;
cvWaitKey(33);
}
return 0;
}