I'm trying to add dlib library to Qt project to run fhog_object_detector_ex.cpp file on ubuntu. I've built dlib using CMake and now i'm trying to run it in Qt.I have added these lines in myproject.pro
SOURCES += $$PWD/dlib-19.2/dlib/all/source.cpp
INCLUDEPATH += $$PWD/dlib-19.2
LIBS += $$PWD/dlib19.2/examples/build/dlib_build/libdlib.a
LIBS += -pthread
I am including these headers in code:
#include <dlib/svm_threaded.h>
#include <dlib/gui_widgets.h>
#include <dlib/image_processing.h>
#include <dlib/data_io.h>
but when i run the program i got errors, here are some errors:enter image description here
Please help me to deal with it.
You need to link to X11 in addition to pthread.
Related
What i want to do
I try to use opencv and run a short example program.
Problem
It exits with code -1073741515. I never managed to use openCV on any of the 4 systems i tried, so i do something wrong but don't know what.
I had diffrenet errors using different attempts (undefined reference, crashing programm without error code, etc.), this here is the just simplest example.
What i figured out
Another post told me, that -1073741515 is equal to 0xC0000135 meaning STATUS_DLL_NOT_FOUND.
What i tried
The programm crashes, if include #include <opencv2/core/core.hpp>,
#include <opencv2/highgui/highgui.hpp>and
#include <opencv2/imgproc/imgproc.hpp>. When i comment them out, it runs wnd returns 0 as intended. I don't even need to use anything like cv::Mat or something to make it crash. That seems strange, because the code completion suggests me stuff from openCV, so it somehow sees it. Including #include <opencv2/opencv.hpp> instead leads to the same error code. Including something beginning with opencv (not opencv2) works, for example #include <opencv/cv.hpp>, but has not enough functionality.
Source file
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <iostream>
using namespace std;
int main()
{
cv::Mat InputImage = cv::imread("C:/Users/Public/Pictures/Sample Pictures/Chrysanthemum.jpg");
if(!InputImage.empty())
cv::imshow("test", InputImage);
else
cout << "imgage is empty" << endl;
return 0;
}
Project file
TEMPLATE = app
CONFIG += console c++11
CONFIG -= app_bundle
CONFIG -= qt
INCLUDEPATH += D:/opencv/build/include
LIBS += -LD:/opencv/build/x64/vc14/lib
LIBS += -lopencv_world343d
LIBS += -lopencv_world343
SOURCES += \
main.cpp
Relevant folders
Include path:
libs:
project:
build (copied the libs to the release/debug folders too):
Versions
QT 5.10.1
MSVC17 64bit Compiler
Windows 7 Enterprise 64bit
openCV 3.4.3 (vc14/vc15)
As Jiu pointed out in the comment above, the solution was simple:
Copy the .dll not the .lib and it works.
List of Errors
I think I have included the library for winInet.h in the QT Project file here:
project.pro
QT += qml quick network
CONFIG += c++11
SOURCES += main.cpp \
xmap.cpp
RESOURCES += qml.qrc
LIBS += -lwininet
Everytime I try qmake and build the header file shows many syntax errors and I'm curious if its because I'm wrong in my qt project file syntax.
xmap.h
#ifndef XMAP_H
#define XMAP_H
#include <iostream>
#include <WinInet.h> // <--- ISSUE
#include <Windows.h>
#include <time.h>
class xmap
{
public:
xmap();
// test connection to websites for data
int CheckConnection(int connection = 0);
// pull data from online sources to be evaluated by the model
void RequestAndSaveData(std::string filename);
};
#endif // XMAP_H
Essentially the same as C++ 307 Errors when trying to include winhttp.h in visual studio 2010, except that was using WinHttp instead of WinInet.
Still, same solution: include <Windows.h> before <WinInet.h>.
I try to use libltdl in Qt on OSX. I downloaded the library with brew and i can find it in /usr/local/lib/libltdl.dylib .
I link it in Qt Creator using the assistant and those lines were added to my .pro
macx: LIBS += -lltdl
The problem is when i use :
#include <ltdl.h>
the app doesn't compile and the following error appears :
fatal error: 'ltdl.h' file not found
#include <ltdl.h>
Thanks for your help !
First off, I alread got the smaller example paex_record.c to work.
I use MinGW on Windows8 and did compile portaudio from source, that's were I got the used libportaudio-2.dll from.
I set up a project in QtCreator (without gui) with following .pro-file:
TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt
SOURCES += main.cpp
LIBS += -LC:/Audio/patest/paex_record_file -llibportaudio-2
My folder C:/Audio/patest/paex_record_file looks like:
libportaudio-2.dll
main.cpp
pa_ringbuffer.c
pa_ringbuffer.h
pa_util.h
paex_record_file.pro
paex_record_file.pro.user
portaudio.h
I copied both pa_ringbuffer and pa_util to this folder after they were not found.
Main.cppcontains the whole example file paex_record_file.c from the portaudio source.
There is an error when calling the ringbuffer (line 246 and 271: source):
"min" was not declared in this scope
I thought this example would directly run just like the record.c example.
Do I need to include further packages? I've tried algorithm, math, std and using namespace std, but still the error occurs. But I get the feeling it should work out off box, perhaps my include files or folder setup / linkage is not ok?
EDIT: Ok so I just defined a min-function on my own. Now it throws different error:
undefined reference to "PaUtil_GetRingBufferReadAvailable"
and a couple more of this kind. There is probably a lib missing to be linked, having a look...
I also had this linking error trying to compile paex_record_file.c. Turns out you need to compile pa_ringbuffer.c before compiling the main file. There's also an external dependency on some alloc function, so you need to change 2 lines in the file.
I'm not savvy of qt but you need to do something like:
SOURCES += pa_ringbuffer.c main.cpp
Here's how I compile with MinGW:
Changes inside paex_record_file.c
Line 313 : data.ringBufferData = (SAMPLE *) malloc( numBytes );
Line 443 : free( data.ringBufferData );
Compile with MinGW:
gcc -o p_rec.exe C:\path_to_portaudio\portaudio\common\pa_ringbuffer.c \
paex_record_file.c -lportaudio \
-IC:\path_to_portaudio\portaudio\src\common
I didn't get the min problem, but perhaps you can try to remove the ifdef guard and try to recompile.
#ifdef _WIN32
#include <windows.h>
#include <process.h>
#endif
to
#include <windows.h>
#include <process.h>
Sorry to being a noob, but I just moved from Window, Eclipse and Java to OpenSUSE, C++ and Qt Creator, and I met a problem. I am working to create a QGIS application, I have the *.h files in /usr/include/gqis, and *.so files in /usr/lib. I added this line
INCLUDEPATH += /usr/local/include/qgis
at the end of .pro file of project so I can include QGIS library. So far as I coded, everything went smoothly, but when I built the project, Qt Creator threw an error:
qgis.h: No such file or directory
/usr/include/qgis/qgsapplication.h
and it mapped to line 4:
#include <QtGui/QApplication>
#include "mainwindow.h"
#include <qgis/qgsvectorlayer.h>
#include <qgis/qgsapplication.h>
#include <qgis/qgsproviderregistry.h>
#include <qgis/qgssinglesymbolrenderer.h>
#include <qgis/qgsmaplayerregistry.h>
#include <qgis/qgsvectorlayer.h>
#include <qgis/qgsmapcanvas.h>
As far as I searched, I am still unable to solve this problem. Please can anyone help me?
You should do:
INCLUDEPATH += /usr/local/include/qgis
and
#include <QtGui/QApplication>
#include "mainwindow.h"
#include <qgsvectorlayer.h>
#include <qgsapplication.h>
#include <qgsproviderregistry.h>
#include <qgssinglesymbolrenderer.h>
#include <qgsmaplayerregistry.h>
#include <qgsvectorlayer.h>
#include <qgsmapcanvas.h>
Try just:
INCLUDEPATH += /usr/local/include/
Afterall, the qgis is already listed in the #include <qgis/...> path.
I'm using a windows Machine. I'm not sure why this is the case but if you put your project in a shallow directory, the problem might go away. Instead of something like C:\Projects\C++\IntroToDesignPatterns2012\Chapter13\objectBrowser02\objectBrowser02
Try something simple like C:\Projects\objectBrowser02