对cv::calcOpticalFlowPyrLK的未定义引用
undefined reference to cv::calcOpticalFlowPyrLK
我现在正在学习OpenCV,并且正在测试可用的LK演示程序。我对编程还很陌生,所以我不知道出了什么问题。
我遇到了这些问题:
C:Qtprojectsbuild-lkdemo-Desktop_Qt_5_3_MinGW_32bit-Debugdebugmain.o:-1: In function `Z5qMainiPPc':
C:Qtprojectslkdemomain.cpp:96: error: undefined reference to `cv::calcOpticalFlowPyrLK(cv::_InputArray const&, cv::_InputArray const&, cv::_InputArray const&, cv::_OutputArray const&, cv::_OutputArray const&, cv::_OutputArray const&, cv::Size_<int>, int, cv::TermCriteria, int, double)'
collect2.exe:-1: error: error: ld returned 1 exit status
这是代码:
#include <QApplication>
#include "opencv2/video/tracking.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <iostream>
#include <ctype.h>
using namespace cv;
using namespace std;
static void help()
{
// print a welcome message, and the OpenCV version
cout << "nThis is a demo of Lukas-Kanade optical flow lkdemo(),n"
"Using OpenCV version %sn" << CV_VERSION << "n"
<< endl;
cout << "nHot keys: n"
"tESC - quit the programn"
"tr - auto-initialize trackingn"
"tc - delete all the pointsn"
"tn - switch the "night" mode on/offn"
"To add/remove a feature point click itn" << endl;
}
Point2f point;
bool addRemovePt = false;
static void onMouse( int event, int x, int y, int /*flags*/, void* /*param*/ )
{
if( event == CV_EVENT_LBUTTONDOWN )
{
point = Point2f((float)x,(float)y);
addRemovePt = true;
}
}
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
VideoCapture cap;
TermCriteria termcrit(CV_TERMCRIT_ITER|CV_TERMCRIT_EPS,20,0.03);
Size subPixWinSize(10,10), winSize(31,31);
const int MAX_COUNT = 500;
bool needToInit = false;
bool nightMode = false;
if( argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0])))
cap.open(argc == 2 ? argv[1][0] - '0' : 0);
else if( argc == 2 )
cap.open(argv[1]);
if( !cap.isOpened() )
{
cout << "Could not initialize capturing...n";
return a.exec();
}
help();
namedWindow( "LK Demo", 1 );
setMouseCallback( "LK Demo", onMouse, 0 );
Mat gray, prevGray, image;
vector<Point2f> points[2];
for(;;)
{
Mat frame;
cap >> frame;
if( frame.empty() )
break;
frame.copyTo(image);
cvtColor(image, gray, CV_BGR2GRAY);
if( nightMode )
image = Scalar::all(0);
if( needToInit )
{
// automatic initialization
goodFeaturesToTrack(gray, points[1], MAX_COUNT, 0.01, 10, Mat(), 3, 0, 0.04);
cornerSubPix(gray, points[1], subPixWinSize, Size(-1,-1), termcrit);
addRemovePt = false;
}
else if( !points[0].empty() )
{
vector<uchar> status;
vector<float> err;
if(prevGray.empty())
gray.copyTo(prevGray);
calcOpticalFlowPyrLK(prevGray, gray, points[0], points[1], status, err, winSize,
3, termcrit, 0, 0.001);
size_t i, k;
for( i = k = 0; i < points[1].size(); i++ )
{
if( addRemovePt )
{
if( norm(point - points[1][i]) <= 5 )
{
addRemovePt = false;
continue;
}
}
if( !status[i] )
continue;
points[1][k++] = points[1][i];
circle( image, points[1][i], 3, Scalar(0,255,0), -1, 8);
}
points[1].resize(k);
}
if( addRemovePt && points[1].size() < (size_t)MAX_COUNT )
{
vector<Point2f> tmp;
tmp.push_back(point);
cornerSubPix( gray, tmp, winSize, cvSize(-1,-1), termcrit);
points[1].push_back(tmp[0]);
addRemovePt = false;
}
needToInit = false;
imshow("LK Demo", image);
char c = (char)waitKey(10);
if( c == 27 )
break;
switch( c )
{
case 'r':
needToInit = true;
break;
case 'c':
points[1].clear();
break;
case 'n':
nightMode = !nightMode;
break;
default:
;
}
std::swap(points[1], points[0]);
swap(prevGray, gray);
}
return a.exec();
}
有什么我需要知道的来解决这个问题吗?
编辑1:这是我的。专业:
#-------------------------------------------------
#
# Project created by QtCreator 2015-02-26T10:12:31
#
#-------------------------------------------------
INCLUDEPATH += C:opencv-mingwinstallinclude
LIBS += -L"C:/opencv-mingw/install/x64/mingw/bin"
LIBS += -lopencv_core249 -lopencv_highgui249 -lopencv_imgproc249
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = lkdemo
TEMPLATE = app
SOURCES += main.cpp
cv::calcOpticalFlowPyrLK()是video
模块的一部分。您应该将opencv_videoXXXXd.lib
和/或opencv_videoXXXX.lib
添加到链接器中。
即:
LIBS += -lopencv_core249 -lopencv_highgui249 -lopencv_imgproc249 -lopencv_video249
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