Problem qith OpenCV and Qt creator

AlbertoAlegria

I cant compile my OpenCV program in Qt, i post my OpenCV code and my .pro file. I dont know exactly waths happenned, I'm new in Qt, but in OpenCV I have a little bit more experience

SGaist

What error does your compiler give you ?

burdos

i have a problem I just downloaded the qt and also I want to use the opencv but I can't because it says
#-------------------------------------------------

Project created by QtCreator 2014-04-02T02:57:55

#-------------------------------------------------

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = JanelaOpenCv
TEMPLATE = app
LIBS += -lopencv_core
-lopencv_highgui
SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui
it says that they cannot find the libraries I do not know how to kink them or how to start working with it thanks

SGaist

If OpenCV is not installed in a known path, you need to tell Qt where to find it.

Add
@LIBS += -L/path/to/OpenCV/libraries@

To your pro file

burdos

ok fine i did this
#-------------------------------------------------

Project created by QtCreator 2014-04-02T13:24:58

#-------------------------------------------------

QT += core

QT -= gui

TARGET = Consola
CONFIG += console
CONFIG -= app_bundle
LIBS += -L/path/to/OpenCV/libraries
TEMPLATE = app

SOURCES += main.cp

i have my openCv in the following path so how do i have to do set it to start using it
the path is the following
E:\Open Cv\opencv\build\x86\vc12\lib
so please help me how to do it i am new on it

SGaist

@LIBS += -LE:/OpenCV/opencv/build/x86/vc12/lib@

Forward slashes and avoid spaces in the path, it's known to be problematic

burdos

Oh ok thanks for the help so it runs now very well so it means that all the libraries in the folder can be used right??

SGaist

Yes it is right

burdos

i am trying to do run my code in this way
//objectTrackingTutorial.cpp

//Written by Kyle Hounslow 2013

//Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software")
//, to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
//and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

//The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
//IN THE SOFTWARE.

#include <sstream>
#include <string>
#include <iostream>
#include <opencv\highgui.h>
#include <opencv\cv.h>

using namespace cv;
//initial min and max HSV filter values.
//these will be changed using trackbars
int H_MIN = 0;
int H_MAX = 256;
int S_MIN = 0;
int S_MAX = 256;
int V_MIN = 0;
int V_MAX = 256;

but it says
E:\QT\Qt Projects\Project 2\Consola\Project_image\main.cpp:19: error: opencv\highgui.h: No such file or directory
#include <opencv\highgui.h>
^

E:\QT\Qt Projects\Project 2\Consola\Project image\main.cpp

so please how can i solve it

SGaist

Add the path of OpenCV's include.
Something like:

@INCLUDEPATH += E:/OpenCV/opencv/include@

burdos

i just did it but ok i have this code
QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = Project_image
TEMPLATE = app
INCLUDEPATH += E:/OpenCV/opencv/include
LIBS += -LE:/OpenCV/opencv/build/x86/vc12/lib
SOURCES += main.cpp
mainwindow.cpp
../../../project 1/objectTrackingTut.cpp
../../../project 1/objectTrackingTut.cpp
../../../project 1/objectTrackingTut.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui

and in the main i have
#include <sstream>
#include <string>
#include <iostream>
#include <opencv\highgui.h>
#include <opencv\cv.h>

using namespace cv;
//initial min and max HSV filter values.
//these will be changed using trackbars
int H_MIN = 0;
int H_MAX = 256;
int S_MIN = 0;
int S_MAX = 256;
int V_MIN = 0;
int V_MAX = 256;
//default capture width and height
const int FRAME_WIDTH = 640;
const int FRAME_HEIGHT = 480;
//max number of objects to be detected in frame
const int MAX_NUM_OBJECTS=50;
//minimum and maximum object area
const int MIN_OBJECT_AREA = 2020;
const int MAX_OBJECT_AREA = FRAME_HEIGHTFRAME_WIDTH/1.5;
//names that will appear at the top of each window
const string windowName = "Original Image";
const string windowName1 = "HSV Image";
const string windowName2 = "Thresholded Image";
const string windowName3 = "After Morphological Operations";
const string trackbarWindowName = "Trackbars";
void on_trackbar( int, void* )
{//This function gets called whenever a
// trackbar position is changed

and i still have problems it says

#include <opencv\highgui.h> not such a file or directory i do not know why

chfakht

@SGaist please where can i found the build directory in QtCreator !!

SGaist

Look at the Projects panel, you have the "Build directory" path there