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我在网上找到了此代码..我想尝试>
int main( int argc, char **argv )
{
VideoCapture cam1, cam2; //Middle and left cameras
//VideoCapture cam3; //Right camera
cam1.open(0);
cam2.open(1);
//cam3.open(2);
cam1.set(CV_CAP_PROP_FRAME_WIDTH, 320);
cam1.set(CV_CAP_PROP_FRAME_HEIGHT, 240);
cam2.set(CV_CAP_PROP_FRAME_WIDTH, 320);
cam2.set(CV_CAP_PROP_FRAME_HEIGHT, 240);
//cam3.set(CV_CAP_PROP_FRAME_WIDTH, 320);
//cam3.set(CV_CAP_PROP_FRAME_HEIGHT, 240);
Mat frm1, frm2;
while(1)
{
//Step 1: Get frames from a few cameras
cam1 >> frm1; //Reference plane
cam2 >> frm2; //Right-side target plane
// cam3 >> frm3;
if( frm1.empty()||frm2.empty() )
break;
//Step2: SURF detection
int minHessian = 800;
SurfFeatureDetector detector( minHessian );
vector<KeyPoint> keypoints_1, keypoints_2;
detector.detect( frm1, keypoints_1 );
detector.detect( frm2, keypoints_2 );
SurfDescriptorExtractor extractor; ///
Mat descriptors_1, descriptors_2;
extractor.compute( frm1, keypoints_1, descriptors_1 );
extractor.compute( frm2, keypoints_2, descriptors_2 );
//Step 3: Feature matching
//-- Matching descriptor vectors with a matcher
FlannBasedMatcher matcher;
vector< DMatch > matches;
matcher.match( descriptors_1, descriptors_2, matches);
//vector< vector<DMatch> > matches;
//matcher.knnMatch( descriptors_1, descriptors_2, matches,2);
double max_dist = 0; double min_dist = 50;
//-- Quick calculation of max and min distances between keypoints
for( int i = 0; i < descriptors_1.rows; i++ )
{ double dist = matches[i].distance;
if( dist < min_dist ) min_dist = dist;
if( dist > max_dist ) max_dist = dist;
}
//printf("-- Max dist : %f \n", max_dist );
//printf("-- Min dist : %f \n", min_dist );
//-- Draw only "good" matches (i.e. whose distance is less than 3*min_dist )
vector< DMatch > good_matches;
for( int i = 0; i < descriptors_1.rows; i++ )
{ if( matches[i].distance < 2*min_dist )
{ good_matches.push_back( matches[i]); }
}
Mat img_matches;
drawMatches( frm1, keypoints_1, frm2, keypoints_2,
good_matches, img_matches, Scalar::all(-1), Scalar::all(-1),
vector<char>(), DrawMatchesFlags::NOT_DRAW_SINGLE_POINTS );
//-- Localize the object from frame1 in frame2
vector<Point2f> frame1;
vector<Point2f> frame2;
for( int i = 0; i < good_matches.size(); i++ )
{
//-- Get the keypoints from the good matches
frame1.push_back( keypoints_1[ good_matches[i].queryIdx ].pt );
frame2.push_back( keypoints_2[ good_matches[i].trainIdx ].pt );
}
//Step 4: RANSAC and Homography
Mat H = findHomography( Mat(frame2), Mat(frame1), CV_RANSAC, 5.0 );
cout << "Homography for mapping the r-side plane to the ref. plane: " << endl << H << endl;
//-- Show detected matches
imshow("Matches", img_matches );
//Step 5:Warping
Mat result;
warpPerspective(frm2,result,H,Size(3*frm1.cols,1.5*frm1.rows));
imshow("Warping result",result);
Mat half(result,Rect(0,0,frm2.cols,frm2.rows));
frm1.copyTo(half);//Reference image
//Step 6:Blending
//Step 7:Showing the panoramic video
imshow("Blended view",result);
char c=waitKey(20);
if (c==27)
break;
}
return 0;
}
但是，当我尝试运行代码时，我发现了此错误..我也在OpenCV教程中检查了代码，直到findhomography部分，它们几乎完全相同。
OpenCV Error: Unsupported format or combination of formats
(type=0) in buildIndex_, file OpenCV-2.3.1/modules/flann/src/miniflann.cpp,
line 297 terminate called after throwing an instance of 'cv::Exception' what()
OpenCV-2.3.1/modules/flann/src/miniflann.cpp:297: error:
(-210) type=0 in function buildIndex_
有什么想法可能会出问题吗？
谢谢