This is a somewhat noob question.. I am trying display opencv images in OpenFrameworks. I am not using codeblocks or any specific IDE. I tried including the header file paths into the makefile, but was unable to run the code successfully.
For example, I have a test program such as
#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <stdlib.h>
#include <iostream>
#include "ofMain.h"
#include "testApp.h"
#include "ofAppGlutWindow.h"
using namespace std;
using namespace cv;
int main(int argc, char** argv)
{
ofAppGlutWindow window;
ofSetupOpenGL(&window, 300, 300, OF_WINDOW);
ofRunApp( new testApp());
}
The flags in the makefile look like this
OF_FLAGS = -L../../../libs/openFrameworks/ -L../../../libs/openFrameworks/app
INCL = -I/usr/local/include
LIBS = -L/usr/local/lib -lopencv_core -lopencv_highgui
How do I exactly include the ofMain.h, testApp.h and ofAppGlutWindow.h paths into the makefile?
If you only want to use OpenCV with openFrameworks and don't want to do some super fancy custom stuff, I would recommend just looking at the open cv examples, which are bundled with openFrameworks. Just look in the <of folder>/examples/addons folder and try to compile opencvExample or opencvHaarFinderExample. If there are no Makefiles in the folder, try to generate them with the ofProjectGenerator. If everything is setup right, there is no need for manually change config.make or the Makefile of an example.
If the examples are the right direction for you, copy them, rename them and start your own project out of this.
Make sure the libs folder of ofxOpenCV is included in Build Settings > Search Paths > Header Search Paths.
In case it's not obvious, click on your XCode project in the upper left, then in the horizontal menu near the top, click on Build Settings and scroll down to Search Paths. Double click inside the value field for Header Search Paths and add ../../../addons/ofxOpenCV/libs. Lastly, set the dropdown on the right to recursive.
Related
First, I am new to C++ and dlib but I have successfully built the examples and started working on my own project. Things have been progressing smoothly until I try to save a jpeg. Attempting to compile code using dlib::save_jpeg throws a linker error and I cannot track down the solution. I have attempted to add #define DLIB_JPEG_SUPPORT above and below my #includes but no luck. I am using XCode and used cmake -G "Xcode" .. when I compiled the examples. Relevant code below. Since I am on a Mac, I have added header and library search paths for X11 (for dlib gui), OpenCV, and DLIB. I have libjpeg.dylib and linked that to my project with and without #define DLIB_JPEG_SUPPORT in main.cpp. Is there some other build setting I need to specify? Thank you in advance for your help.
Finally, I have seen other questions and pages about dlib and libjpeg issues but no luck yet. And yes I have source.cpp included in the project.
// the standard stuff
#include <string>
#include <iostream>
#include <unistd.h>
// opencv mat object
#include <opencv2/opencv.hpp>
// dlib>
#include <dlib/opencv.h>
#include <dlib/image_io.h>
#include <dlib/gui_widgets.h>
#include <dlib/image_transforms.h>
int main(int argc, const char * argv[]) {
// retrieving images from a TCP connection
// decode data stream
img = cv::imdecode(rawImage, CV_LOAD_IMAGE_COLOR);
// perform image processing
dlib::cv_image<dlib::bgr_pixel> d_image(img);
// finally save the result to jpg
std::string fname = argv[1] + std::to_string(image_id) + ".jpg";
dlib::save_jpeg(d_image, fname); // <- line that won't compile
return 0;
}
After quit a bit of struggling and side-by-side comparisons I finally found the issue. In XCode go to to Build Settings and modify Other Linker Flags, Run Search Paths, and Other C++ Flags to match the compiled and working face_ex example. I wholesale copied all of those flags and included a missing libjpeg.dylib and was able to get things running. It should look something like this for the C++ flags . Hope this helps the next person.
I'm new to Qt creator. Yesterday, I followed the official instructions to configure OpenCV library but it failed. I tried everything on the Internet but it just didn't work. Detailed are listed as belows:
test code is simple, I only want to ensure whether the library works:
#include <iostream>
#include <opencv2/opencv.hpp>
using namespace std;
int main(int argc, char *argv[])
{
cout << "Hello World!" << endl;
return 0;
}
My project configuration is like below :
I thought there might be a problem in debugger. I configure the debugger and I'm quite sure it's ok. The picture is here:
But it just doesn't work. When I click build and run, it says:
C1083: cannot open containing files: "opencv2/opencv.hpp": No such
file or directory.
What's strange is when I include <files> in the editor, the automatic code completion can detect the existence of the OpenCV library and hint after <opencv2/> that there are opencv.hpp, core.hpp .etc. and in the Include Hierarchy, the opencv.hpp exists.
So what might be the problem?
I have QT 5.1.1 installed on my machine, but I'm having some troubles using it. I'm trying to run the following simple program that requires QT:
//Playing Video
#include "cv.h"
#include "opencv2\objdetect\objdetect.hpp"
#include "opencv2\core\core.hpp"
#include "opencv2\highgui\highgui.hpp"
#include "opencv2\features2d\features2d.hpp"
#include "opencv2\calib3d\calib3d.hpp"
#include "opencv2\nonfree\nonfree.hpp"
#include "highgui.h"
#include <openbr\openbr_plugin.h>
using namespace cv;
static void printTemplate(const br::Template &t)
{
const QPoint firstEye = t.file.get<QPoint>("Affine_0");
const QPoint secondEye = t.file.get<QPoint>("Affine_1");
printf("%s eyes: (%d, %d) (%d, %d)\n", qPrintable(t.file.fileName()), firstEye.x(), firstEye.y(), secondEye.x(), secondEye.y());
}
int main(int argc, char *argv[])
{
br::Context::initialize(argc, argv);
// Retrieve classes for enrolling and comparing templates using the FaceRecognition algorithm
QSharedPointer<br::Transform> transform = br::Transform::fromAlgorithm("FaceRecognition");
QSharedPointer<br::Distance> distance = br::Distance::fromAlgorithm("FaceRecognition");
// Initialize templates
br::Template queryA("../data/MEDS/img/S354-01-t10_01.jpg");
br::Template queryB("../data/MEDS/img/S382-08-t10_01.jpg");
br::Template target("../data/MEDS/img/S354-02-t10_01.jpg");
// Enroll templates
queryA >> *transform;
queryB >> *transform;
target >> *transform;
printTemplate(queryA);
printTemplate(queryB);
printTemplate(target);
// Compare templates
float comparisonA = distance->compare(target, queryA);
float comparisonB = distance->compare(target, queryB);
// Scores range from 0 to 1 and represent match probability
printf("Genuine match score: %.3f\n", comparisonA);
printf("Impostor match score: %.3f\n", comparisonB);
br::Context::finalize();
return 0;
}
It also requires OpenCV 2.4.6.1 and OpenBR, but that's not the problem.
All the definitions (variables and functions) in the above code that are related to QT are undefined. I've tried to find the relevant h files in QT folder and to include them, but that did not succeed since I couldn't fine qtcore.h (but a different file named qtcore with lot's of includes that I don't now how to use). I've tried to add QT "include" directory under "additional include directories" in the project properties but that didn't work either. I've also tried to add QT "lib" folder under "additional library directories" but that also did not work.
Basically, I tried everything I could think of. Can someone please explain how to I use those QT definitions? I'm really stuck and I could use any help given.
Thanks,
Gil.
(Optional) Update to Qt 5.2.
Start Qt Creator.
Create a new Qt Widgets Application project. You can give the class/files random names, it doesn't matter. Uncheck the "generate form" option, as you don't need any forms.
Remove all the files other than main.cpp from the project. You do this by right-clicking on them in the project tree on the left and choosing Remove File.
Copy-paste your code into main cpp. Make sure you completely replace main.cpp's contents, the default contents shouldn't be there anymore.
Add the opencv library to the project. Right-click on the project's root, select "Add Library", and go from there.
Re-run qmake by right-clicking on the project root and selecting "Run qmake".
Build and run the project by pressing Ctrl-R (Cmd-R on mac).
Qt uses a (non-standard) custom toolchain that has to run before the Qt-dependent code can be compiled. I've never tried using Qt outside of QtCreator, but if you really need Qt I'd suggest you use the QtCreator IDE; if you're not using it already of course. It's a very decent IDE, even for non-Qt projects.
Also, if you haven't done so already, make sure the Qt SDK is installed; the headers alone are not enough. QtCreator by itself is also not enough, you'll need the SDK. If you don't feel like doing so, my suggestion would be to look at Poco. It's not a 1:1 replacement for Qt, but a very mature framework nevertheless.
So i am really new to openCV and all the image recognition stuff. So i use monodevelop and i installed OpenCV using apt-getand i included these files
include "opencv2/highgui/highgui.hpp"
include "opencv2/imgproc/imgproc.hpp"
include <opencv2/opencv.hpp>
include <opencv2/imgproc/imgproc.hpp>
include<iostream>
include<vector>
include<algorithm>
include <X11/Xlib.h>
include <X11/Xutil.h>
but this function convexityDefects() shows as undefined
EDIT
So the problem is that the compiler shows that function convexityDefects is not defined in this scope
Here is the full code that i cant get to work -> Code
Could you please point me out!?
Thank you.
So i found the answer i was looking for.....
The libraries i used to compile my project where in wrong location.
so i used pkg-config --libs --cflags opencv to find exactly where are my libs....
After that i included these libraries in Code-Blocks and everything magicly started to work.
I installed Xcode 4 awhile ago and I finally got around to getting cppunit installed. I tried using it in one of my projects last night and I keep getting errors that Xcode cannot find cppunit files.
E.g. Lexical or Preprocessor Issue 'cppunit/extensions/TestFactoryRegistry.h' not found.
main.cpp
#include <iostream>
#include "exception.h"
#include "dataStruct.h"
#include <cppunit/extensions/TestFactoryRegistry.h>
#include <cppunit/ui/text/TestRunner.h>
int main ()
{
CppUnit::TextUi::TestRunner runner;
CppUnit::TestFactoryRegistry ®istry = CppUnit::TestFactoryRegistry::getRegistry();
runner.addTest (registry.makeTest ());
return runner.run ("", false);
}
So I checked /usr/local/include and /usr/local/lib and all the cppunit files are there. There were no errors when I installed cppunit either. It is my understanding that Xcode searches /usr/local/include and /usr/local/lib by default. Do I need to add something to a path variable or change a project setting to get it to work?
Thanks in Advance,
Madison
Figured it out. You need to add custom search paths to the project:
And then you have to tell the linker what to do: