[solved] Linking Nokia Qt with OpenVC

andre

[quote author="tanclanship" date="1300090621"]What is a cross compiler ? Can you explain it to me ? [/quote]
A "cross compiler":http://en.wikipedia.org/wiki/Cross_compiler is compiler that runs on platform A to produce binaries for platform B.

So, in order to produce software that runs on Symbian, you probably will be needing a cross compiler that runs on your desktop and that produces binaries for Symbian, as you don't want want to compile your software on the device itself, I'd say :)

tanclanship

Andre -> Thanks for the information. Do NokiaQT could perform cross compiler on other third party libraries too ?

andre

[quote author="tanclanship" date="1300091670"]Andre -> Thanks for the information. Do NokiaQT could perform cross compiler on other third party libraries too ?
[/quote]
I would imagine that an installed cross compilation tool chain would work for third party libraries too, if these libraries can be compiled for the different platform. For instance, if your library makes use of x86 specific functionality, then you can not expect to be able to compile and/or run it successfully on an ARM based device.

tanclanship

Andre -> I see. then the libraries do can be compile at different platforms . But problem again is that I do now know how to do it(refer first post). Thanks again

Me -> Will be waiting here patiently for someone to solve the OpenCV and NOkiaQT problem.Been killing me

andre

[quote author="tanclanship" date="1300092807"]Andre -> I see. then the libraries do can be compile at different platforms . But problem again is that I do now know how to do it(refer first post). Thanks again[/quote]
I have no experience with this library, so I can't help you there.
[quote]
Me -> Will be waiting here patiently for someone to solve the OpenCV and NOkiaQT problem.Been killing me[/quote]
I doubt that is a very effective strategy. I'd keep trying to find a solution myself, with lots of googling, posting in relevant forums, looking for relevant mailing lists, trying for relevant IRC channels, and if all else fails, even trying to email the author of the OpenCV library and politely asking where you might find pointers to solve your problem. The internet is a big place, and DevNet is not the only place where you might unearth solutions to your problems.

giesbert

You can create a project qith QMake for the sources to compile (should also work with non Qt projects). You can use qmake -project for that. Then you can compile for the needed platform as you do with all other projects in QtCreator...

cincirin

Below is my application project linked with OpenCV 2.2 (It works like a charm with 2 cameras attached)

...
OPENCV_DIR = ../../../../LIBS/OpenCV/OpenCV-2.2

INCLUDEPATH +=
$$OPENCV_DIR/include
$$OPENCV_DIR/modules/core/include
$$OPENCV_DIR/modules/imgproc/include
$$OPENCV_DIR/modules/video/include
$$OPENCV_DIR/modules/features2d/include
$$OPENCV_DIR/modules/flann/include
$$OPENCV_DIR/modules/calib3d/include
$$OPENCV_DIR/modules/objdetect/include
$$OPENCV_DIR/modules/legacy/include
$$OPENCV_DIR/modules/highgui/include
$$OPENCV_DIR/modules/ml/include
$$OPENCV_DIR/modules/contrib/include

LIBS =
-L$$OPENCV_DIR/modules/core/lapack/$$CONFDIR
-L$$OPENCV_DIR/modules/core/$$CONFDIR
-L$$OPENCV_DIR/modules/highgui/$$CONFDIR

-lopencv_lapack
-lopencv_core
-lopencv_highgui

win32: LIBS += -lvfw32 -lole32

giesbert

this is the project file of your app, not for openVC.
You have to build OpenVC for the target platform.

So: get the source of OpenVC and compile it for your target platform.

cincirin

I have compiled all modules from OpenCV 2.2 in Windows 7 and Ubuntu 64 bits.
All the modules I've compiled with QtCreator. They are: lapack, core, contrib, calib3d, features2d, flann, gpu, haartraining, highgui, imgproc, legacy, ml, objdetect, traincascade, video.

My application is linked with OpenCV with Qt project described above.

giesbert

You are at a mobile forum,
are you building for mobile?
or for win7 and Ubuntu 64 bits?

cincirin

I apologize, I have not noticed that it is a mobile forum.
Yes, I have compiled for win7 and Ubuntu (32&64).
In the near future, I'll try to compile for mobile platform.
Sorry again.

andre

[quote author="cincirin" date="1300101520"]I apologize, I have not noticed that it is a mobile forum.
Yes, I have compiled for win7 and Ubuntu (32&64).
In the near future, I'll try to compile for mobile platform.
Sorry again.[/quote]

-OK, so I have moved the thread to the General & Desktop forum.-
Moved back to Mobile & Embedded on request of TS.

tanclanship

I have follow your instruction by downloading and install OpenCV2.2 in my default folder. C:/OpenCV2.2 . Below is my pro file. I have chance the OPENCV_DIR following my directory. but when I compile using NokiaQT I have error stating cannot find -lopencv_lapack. Please help thank you

@OPENCV_DIR = C:/OpenCV2.2

INCLUDEPATH +=
$$OPENCV_DIR/include
$$OPENCV_DIR/modules/core/include
$$OPENCV_DIR/modules/imgproc/include
$$OPENCV_DIR/modules/video/include
$$OPENCV_DIR/modules/features2d/include
$$OPENCV_DIR/modules/flann/include
$$OPENCV_DIR/modules/calib3d/include
$$OPENCV_DIR/modules/objdetect/include
$$OPENCV_DIR/modules/legacy/include
$$OPENCV_DIR/modules/highgui/include
$$OPENCV_DIR/modules/ml/include
$$OPENCV_DIR/modules/contrib/include

LIBS =
-L$$OPENCV_DIR/modules/core/lapack/$$CONFDIR
-L$$OPENCV_DIR/modules/core/$$CONFDIR
-L$$OPENCV_DIR/modules/highgui/$$CONFDIR

-lopencv_lapack
-lopencv_core
-lopencv_highgui

win32: LIBS += -lvfw32 -lole32@

cincirin

Sorry "tanclanship" I have compiled all modules from OpenCV 2.2 by myself with QtCreator. If you install OpenCV with precompiled binaries from their site, is almost impossible that libs path be the same.
Anyway, I looked at their site, and there are two download locations: one for Unix, one for Windows.
For Windows, I have noticed that there are two variants : one with pre-compiled 32-bit binaries for Visual Studio 2010 developers, and one zip package with sources/headers to be build for your development environment. Which of these three options you've used ?

tanclanship

Windows Pre Compile 32 bit. So any suggestion what should I do next ?

giesbert

Hi tanclanship,

which compiler tool chain do you use with QtCreator?
I ask as by default, then mingw tool chain is used.

That is important. You can only use C++ libs that are build with the same compiler (also mingw, or same MSVS studio version).

cincirin

I assume that you are using pre-compiled 32-bit binaries for Visual Studio 2010. If you have installed QtSDK for windows, it comes with MinGW toolchain. If you have installed Qt libraries 4.7.2 for windows, it comes tiwh VC2008 compiled libraries. In both both cases I don't think it's possible to link with VC2010 libraries. So, in my opinion you should have to compile OpenCV with MinGW or VC 2008. The simplest way is to use CMake ( OpenCV include tools for cross-compiling with CMake )

tanclanship

Im using the Tool Chain :minGw (it written in my Build Setting).
Cincirin can you please guide me step by step on how to use CMake inside openCV as I have no experience to use it.

giesbert

The easies way (from my point of view) would be:

download source package for OpenVC

create a project for it (qmake -project)

use qmake & mingw-make (or QtCreator)

tanclanship

Gerolf I have done the following list. And now it shows no error. The emulator pop up as usual once debug.Alright so far so good.
Cincirin do you have any simple coding for using OpenCV. so i could test its working

@ IplImage *img = cvLoadImage("funny-pictures-cat-goes-pew.jpg");
cvNamedWindow("Image:",1);
cvShowImage("image:",img);

    cvWaitKey();
    cvDestroyWindow("Image:");
    cvReleaseImage(&img);
    
    return 0;

@

The code above provided using CVNamedWindow cannot be use in the QTSimulator.