Make a standalone OpenCV application using QMake - c++

Question

I was using the OpenCV library to make a console application in Qt Creator (I'm just using QMake and the IDE, not any of the Qt libraries). This is on Ubuntu.
First I was using OpenCV dynamically (using an .so) But I want to execute my application on PCs that don't have OpenCV installed. So I'm trying to make a standalone executable:
I recompile and install OpenCV statically (by using the parameter -DBUILD_SHARED_LIBS=OFF )
I tried adding CONFIG += staticlib on my project.pro but I had remarked that it's still using the dynamic library
I tried to compile on profile/debug/release but none of these build options give me the good result
I finally tried to add QMAKE_LFLAGS += -static and recopied the line on opencv.pc:
LIBS += -L/usr/local/lib -lopencv_contrib -lopencv_stitching -lopencv_nonfree -lopencv_superres -lopencv_ocl -lopencv_ts -lopencv_videostab -lopencv_gpu -lopencv_photo -lopencv_objdetect -lopencv_legacy -lopencv_video -lopencv_ml -lopencv_calib3d -lopencv_features2d -lopencv_highgui -L/usr/local/share/OpenCV/3rdparty/lib -lIlmImf -ljasper -ltiff -lpng -ljpeg -lopencv_imgproc -lopencv_flann -lopencv_core -lzlib -lswscale-ffmpeg -lavutil-ffmpeg -lavformat-ffmpeg -lavcodec-ffmpeg -lgthread-2.0 -lfreetype -lfontconfig -lglib-2.0 -lgobject-2.0 -lpango-1.0 -lpangoft2-1.0 -lgio-2.0 -lgdk_pixbuf-2.0 -lcairo -latk-1.0 -lpangocairo-1.0 -lgdk-x11-2.0 -lgtk-x11-2.0 -lrt -lpthread -lm -ldl -lstdc++
I'm getting these errors:
:-1: error: cannot find -ljasper
:-1: error: cannot find -ltiff
:-1: error: cannot find -ljpeg
:-1: error: cannot find -lgdk_pixbuf-2.0
EDIT:
In reality I'm programming for research purpose, and I m in image processing and pattern recognition, first I was on my computer doing small tests, but now I must do tests on a large database and this is very time comsuming thats why I want to use a cluster and the problem is that the cluster does'nt have opencv that's why I want to bring my .exe
To simplify things I make a small program with main only and some simple function (where figure all the header I used in my program)
headers are:
#include "opencv2/core/core.hpp"
#include "math.h"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv/cv.h"
I put this line in my project.pro to identify the minimal dependencies :
LIBS += -L/usr/local/lib -lopencv_imgproc -lopencv_highgui -lopencv_core
this works correctly but when I add the parametre :
QMAKE_LFLAGS += -static
I have many many erros like:
grfmt_tiff.cpp:-1: error: undefined reference to `TIFFSetErrorHandler'
..
grfmt_jpeg.cpp:-1: error: undefined reference to `jpeg_start_decompress'
..
grfmt_exr.cpp:-1: error: undefined reference to `Imf::FrameBuffer::insert(char const*, Imf::Slice const&)'
..
grfmt_png.cpp:-1: error: undefined reference to `png_create_write_struct'
..
grfmt_jpeg2000.cpp:-1: error: undefined reference to `jas_cleanup'
..
system.cpp:-1: error: undefined reference to `pthread_spin_init'
persistence.cpp:-1: error: undefined reference to `gzeof'
rand.cpp:-1: error: undefined reference to `pthread_once'
..
(.text._ZNSt12_GLOBAL__N_13runEv+0x1d):-1: error: undefined reference to `pthread_setspecific'
After installing what you tell me to install
sudo apt-get install libjasper-dev libtiff-dev libjpeg-dev libgtk2.0-dev
And adding this lines in my .pro
LIBS += -L/usr/lib/x86_64-linux-gnu -ltiff -ljpeg -lpthread -lpng -ljasper -ljbig -lz -llzma
LIBS += -L/usr/local/share/OpenCV/3rdparty/lib -lIlmImf
I had dimunuate the issues to be 63 this error are like :
grfmt_png.cpp:-1: error: undefined reference to `png_set_longjmp_fn'
(.text+0x27a):-1: error: undefined reference to `deflateParams'
IlmThreadMutexPosix.cpp:-1: error: undefined reference to `pthread_mutex_destroy'
IlmThreadPosix.cpp:-1: error: undefined reference to `pthread_join'
ImfZipCompressor.cpp:-1: error: undefined reference to `compress'
(.text+0x185e):-1: error: undefined reference to `pthread_mutex_lock'
ImfPxr24Compressor.cpp:-1: error: undefined reference to `compress'
(.text._ZN12_GLOBAL__N_14pool4freeEPv.constprop.2+0x1d):-1: error: undefined reference to `pthread_mutex_lock'
Here is the simplified code source :
#include <iostream>
#include "opencv2/core/core.hpp"
#include "math.h"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv/cv.h"
#include <iostream>
#include <fstream>
using namespace std;
const double PI_2=atan (1.0)*2.0;
const double PI=atan (1.0)*4.0;
const double PI_4=atan (1.0);
const double PI3_4=PI_2+PI_4;
/*
void Paint_rect(){
cv::Mat imgq=cv::imread("/home/touka/Documents/PalmPrintProject/new-100-bmp-183-187/1_1.jpg",CV_LOAD_IMAGE_COLOR);
cv::Mat imgt=imgq.clone();
cv::rectangle(imgt,cv::Point (150,150),cv::Point (874,874),CV_RGB(255,0,0),2);
cv::imwrite("/home/touka/Desktop/test2.jpg",imgt);
}
void Save_Ort_Mat_File (cv::Mat mt, string file_name){
ofstream myfile;
myfile.open (file_name.c_str());
if(myfile){
for (int i=0;i<mt.rows;i++){
for (int j=0;j<mt.cols; j++)
myfile <<setprecision(8)<< ((mt.at<double>(i,j)*180)/PI)<<" | ";
myfile <<"\n" ;}
myfile.close();}
else{
cout <<"ERROR0";
}
}
*/
cv::Mat Sobel_Gradient_Image (cv::Mat img){
cv::Mat GX,GY,GXY;
cv::Point P(-1,-1);
cv::Vec3d X(1,2,1);
cv::Vec3d Y(1,0,-1);
cv::sepFilter2D(img,GX,img.depth(),Y,X,P,0,cv::BORDER_CONSTANT);
cv::sepFilter2D(img,GY,img.depth(),X,Y,P,0,cv::BORDER_CONSTANT);
vector<cv::Mat> m;
m.push_back(GX); m.push_back(GY);
cv::merge(m,GXY);
return GXY;
}
int main(int argc, char *argv[])
{
cv::Mat test;
cv::Mat imgq=cv::imread("/home/touka/Documents/PalmPrintProject/new-100-bmp-183-187/1_1.jpg",CV_LOAD_IMAGE_COLOR);
// test= Sobel_Gradient_Image(imgq);
// Paint_rect();
// Save_Ort_Mat_File(test,"file");
cout << "Hello World!" << endl;
return 0;
}
EDIT
Affter changing order of library and adding -pthread I finished by having only one error repeated 3 times:
png.cpp:-1: error: undefined reference to `png_set_longjmp_fn'
I don't Know why this error is repeated 3 times Here is the new order:
LIBS += -L/usr/local/lib -lopencv_imgproc -lopencv_highgui -lopencv_core
LIBS += -L/usr/local/share/OpenCV/3rdparty/lib -lIlmImf
LIBS += -L/usr/lib/x86_64-linux-gnu -lpng -ljasper -ltiff -ljpeg -lpthread -ljbig -llzma -pthread -lz

Answer 1

I tried adding CONFIG += staticlib on my project.pro but I had remarked that it's still using the dynamic library
You use this when you want to tell QMake that you are intending your build target itself to be a static library. But you want a console application. See the section with staticlib in it here in QMake's CONFIG documentation
First I was using OpenCV dynamically (using an .so) But I want to execute my application on PCs that don't have OpenCV installed.
In order to replace functionality that was previously provided by a dynamic library, you will need to have all the build dependencies of that library installed (e.g. the xxx-dev packages whoever compiled that .so was using).
I'm really not sure exactly what you're building or what dependencies are legitimate or not. It really helps if you can come up with a Minimal, Complete, Verifiable Example when asking questions. It makes a big difference if you have a tiny program that includes OpenCV, has a main(), and a QMake file that tries to build it...and demonstrates your error, vs. an example others can't see or test!
But...you could try removing those -lxxx lines for the missing libraries and see what happens. If you get link errors from functions which sound like they would be from those libraries, then they are actually needed as a dependency in your app.
But otherwise, just pushing along, you might try:
sudo apt-get install libjasper-dev libtiff-dev libjpeg-dev libgtk2.0-dev