Important: Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct
OpenCV and QT cv::imread only problem...
MarcinX last edited by MarcinX
Dear QT an OpenCV users,
I have installed with CMake actual OpenCV 3.0.0 on my machine. I'm using QT Creator 5.3 with MinGW 32bit (my OS is Win7 64bit).
This simple example code is successfully compiled:
using namespace cv;
int main(int argc, char *argv)
Mat output = Mat::zeros(120,350,CV_8UC3);
putText(output,"Hello World :)", cvPoint(15,70),FONT_HERSHEY_PLAIN,3, cvScalar(0,255,0),4);
It works! So my .pro file, headers, libs, patch etc. should be ok...
But when I try to use something my own, by adding just one line to this code like this:
Mat src = imread("C:/test.bmp",1);
I get the following error during compilation:
undefined reference to `cv::imread(cv::String const&, int)'
I don't really know what I'm doing wrong :(
I have been searching in google etc. People have this issue but they have undefined references with all cv:: functions. I can't understand what is wrong there if my example code works (cv::imshow etc. are works).
Those libs in my .pro file are not enought? Please, have a look:
INCLUDEPATH += E://OpenCV//release//install//include
LIBS += "E:\OpenCV\release\lib\libopencv_core300.dll.a"
LIBS += "E:\OpenCV\release\lib\libopencv_highgui300.dll.a"
LIBS += "E:\OpenCV\release\lib\libopencv_imgproc300.dll.a"
LIBS += "E:\OpenCV\release\lib\libopencv_features2d300.dll.a"
LIBS += "E:\OpenCV\release\lib\libopencv_calib3d300.dll.a"
Thanks a lot in advance for any help.
MarcinX last edited by
Problem is solved thanks to user berak at OpenCV forum.
For other users who can have this problem solution is as follows:
some modules have changed in 3.0. to use imread()/imwrite, add:
LIBS += "E:\OpenCV\release\lib\libopencv_imgcodecs300.dll.a"