mirror of
https://github.com/opencv/opencv.git
synced 2024-12-26 10:48:12 +08:00
261 lines
9.2 KiB
ReStructuredText
261 lines
9.2 KiB
ReStructuredText
.. _Linux_Eclipse_Usage:
|
|
|
|
Using OpenCV with Eclipse (plugin CDT)
|
|
****************************************
|
|
|
|
.. note::
|
|
Two ways, one by forming a project directly, and another by CMake
|
|
|
|
Prerequisites
|
|
===============
|
|
|
|
1. Having installed `Eclipse <http://www.eclipse.org/>`_ in your workstation (only the CDT plugin for C/C++ is needed). You can follow the following steps:
|
|
|
|
* Go to the Eclipse site
|
|
|
|
* Download `Eclipse IDE for C/C++ Developers <http://www.eclipse.org/downloads/packages/eclipse-ide-cc-developers/heliossr2>`_ . Choose the link according to your workstation.
|
|
|
|
#. Having installed OpenCV. If not yet, go :ref:`here <Linux-Installation>`.
|
|
|
|
Making a project
|
|
=================
|
|
|
|
1. Start Eclipse. Just run the executable that comes in the folder.
|
|
|
|
#. Go to **File -> New -> C/C++ Project**
|
|
|
|
.. image:: images/a0.png
|
|
:alt: Eclipse Tutorial Screenshot 0
|
|
:align: center
|
|
|
|
#. Choose a name for your project (i.e. DisplayImage). An **Empty Project** should be okay for this example.
|
|
|
|
.. image:: images/a1.png
|
|
:alt: Eclipse Tutorial Screenshot 1
|
|
:align: center
|
|
|
|
#. Leave everything else by default. Press **Finish**.
|
|
|
|
#. Your project (in this case DisplayImage) should appear in the **Project Navigator** (usually at the left side of your window).
|
|
|
|
.. image:: images/a3.png
|
|
:alt: Eclipse Tutorial Screenshot 3
|
|
:align: center
|
|
|
|
|
|
#. Now, let's add a source file using OpenCV:
|
|
|
|
* Right click on **DisplayImage** (in the Navigator). **New -> Folder** .
|
|
|
|
.. image:: images/a4.png
|
|
:alt: Eclipse Tutorial Screenshot 4
|
|
:align: center
|
|
|
|
* Name your folder **src** and then hit **Finish**
|
|
|
|
* Right click on your newly created **src** folder. Choose **New source file**:
|
|
|
|
* Call it **DisplayImage.cpp**. Hit **Finish**
|
|
|
|
.. image:: images/a7.png
|
|
:alt: Eclipse Tutorial Screenshot 7
|
|
:align: center
|
|
|
|
#. So, now you have a project with a empty .cpp file. Let's fill it with some sample code (in other words, copy and paste the snippet below):
|
|
|
|
.. code-block:: cpp
|
|
|
|
#include <cv.h>
|
|
#include <highgui.h>
|
|
|
|
using namespace cv;
|
|
|
|
int main( int argc, char** argv )
|
|
{
|
|
Mat image;
|
|
image = imread( argv[1], 1 );
|
|
|
|
if( argc != 2 || !image.data )
|
|
{
|
|
printf( "No image data \n" );
|
|
return -1;
|
|
}
|
|
|
|
namedWindow( "Display Image", CV_WINDOW_AUTOSIZE );
|
|
imshow( "Display Image", image );
|
|
|
|
waitKey(0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#. We are only missing one final step: To tell OpenCV where the OpenCV headers and libraries are. For this, do the following:
|
|
|
|
* Go to **Project-->Properties**
|
|
|
|
* In **C/C++ Build**, click on **Settings**. At the right, choose the **Tool Settings** Tab. Here we will enter the headers and libraries info:
|
|
|
|
a. In **GCC C++ Compiler**, go to **Includes**. In **Include paths(-l)** you should include the path of the folder where opencv was installed. In our example, this is ``/usr/local/include/opencv``.
|
|
|
|
.. image:: images/a9.png
|
|
:alt: Eclipse Tutorial Screenshot 9
|
|
:align: center
|
|
|
|
.. note::
|
|
If you do not know where your opencv files are, open the **Terminal** and type:
|
|
|
|
.. code-block:: bash
|
|
|
|
pkg-config --cflags opencv
|
|
|
|
For instance, that command gave me this output:
|
|
|
|
.. code-block:: bash
|
|
|
|
-I/usr/local/include/opencv -I/usr/local/include
|
|
|
|
|
|
b. Now go to **GCC C++ Linker**,there you have to fill two spaces:
|
|
|
|
First in **Library search path (-L)** you have to write the path to where the opencv libraries reside, in my case the path is:
|
|
::
|
|
|
|
/usr/local/lib
|
|
|
|
Then in **Libraries(-l)** add the OpenCV libraries that you may need. Usually just the 3 first on the list below are enough (for simple applications) . In my case, I am putting all of them since I plan to use the whole bunch:
|
|
|
|
|
|
opencv_core
|
|
opencv_imgproc
|
|
opencv_highgui
|
|
opencv_ml
|
|
opencv_video
|
|
opencv_features2d
|
|
opencv_calib3d
|
|
opencv_objdetect
|
|
opencv_contrib
|
|
opencv_legacy
|
|
opencv_flann
|
|
|
|
.. image:: images/a10.png
|
|
:alt: Eclipse Tutorial Screenshot 10
|
|
:align: center
|
|
|
|
If you don't know where your libraries are (or you are just psychotic and want to make sure the path is fine), type in **Terminal**:
|
|
|
|
.. code-block:: bash
|
|
|
|
pkg-config --libs opencv
|
|
|
|
|
|
My output (in case you want to check) was:
|
|
.. code-block:: bash
|
|
|
|
-L/usr/local/lib -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_ml -lopencv_video -lopencv_features2d -lopencv_calib3d -lopencv_objdetect -lopencv_contrib -lopencv_legacy -lopencv_flann
|
|
|
|
Now you are done. Click **OK**
|
|
|
|
* Your project should be ready to be built. For this, go to **Project->Build all**
|
|
|
|
In the Console you should get something like
|
|
|
|
.. image:: images/a12.png
|
|
:alt: Eclipse Tutorial Screenshot 12
|
|
:align: center
|
|
|
|
If you check in your folder, there should be an executable there.
|
|
|
|
Running the executable
|
|
========================
|
|
|
|
So, now we have an executable ready to run. If we were to use the Terminal, we would probably do something like:
|
|
|
|
.. code-block:: bash
|
|
|
|
cd <DisplayImage_directory>
|
|
cd src
|
|
./DisplayImage ../images/HappyLittleFish.png
|
|
|
|
Assuming that the image to use as the argument would be located in <DisplayImage_directory>/images/HappyLittleFish.png. We can still do this, but let's do it from Eclipse:
|
|
|
|
|
|
#. Go to **Run->Run Configurations**
|
|
|
|
#. Under C/C++ Application you will see the name of your executable + Debug (if not, click over C/C++ Application a couple of times). Select the name (in this case **DisplayImage Debug**).
|
|
|
|
#. Now, in the right side of the window, choose the **Arguments** Tab. Write the path of the image file we want to open (path relative to the workspace/DisplayImage folder). Let's use **HappyLittleFish.png**:
|
|
|
|
.. image:: images/a14.png
|
|
:alt: Eclipse Tutorial Screenshot 14
|
|
:align: center
|
|
|
|
#. Click on the **Apply** button and then in Run. An OpenCV window should pop up with the fish image (or whatever you used).
|
|
|
|
.. image:: images/a15.jpg
|
|
:alt: Eclipse Tutorial Screenshot 15
|
|
:align: center
|
|
|
|
#. Congratulations! You are ready to have fun with OpenCV using Eclipse.
|
|
|
|
==================================================
|
|
V2: Using CMake+OpenCV with Eclipse (plugin CDT)
|
|
==================================================
|
|
|
|
(See the `getting started <http://opencv.willowgarage.com/wiki/Getting_started>` section of the OpenCV Wiki)
|
|
|
|
Say you have or create a new file, *helloworld.cpp* in a directory called *foo*:
|
|
|
|
.. code-block:: cpp
|
|
|
|
|
|
#include <cv.h>
|
|
#include <highgui.h>
|
|
int main ( int argc, char **argv )
|
|
{
|
|
cvNamedWindow( "My Window", 1 );
|
|
IplImage *img = cvCreateImage( cvSize( 640, 480 ), IPL_DEPTH_8U, 1 );
|
|
CvFont font;
|
|
double hScale = 1.0;
|
|
double vScale = 1.0;
|
|
int lineWidth = 1;
|
|
cvInitFont( &font, CV_FONT_HERSHEY_SIMPLEX | CV_FONT_ITALIC,
|
|
hScale, vScale, 0, lineWidth );
|
|
cvPutText( img, "Hello World!", cvPoint( 200, 400 ), &font,
|
|
cvScalar( 255, 255, 0 ) );
|
|
cvShowImage( "My Window", img );
|
|
cvWaitKey();
|
|
return 0;
|
|
}
|
|
|
|
1. Create a build directory, say, under *foo*: ``mkdir /build``. Then ``cd build``.
|
|
|
|
#. Put a *CmakeLists.txt* file in build:
|
|
|
|
.. code-block:: bash
|
|
|
|
PROJECT( helloworld_proj )
|
|
FIND_PACKAGE( OpenCV REQUIRED )
|
|
ADD_EXECUTABLE( helloworld helloworld.cxx )
|
|
TARGET_LINK_LIBRARIES( helloworld ${OpenCV_LIBS} )
|
|
|
|
#. Run: ``cmake-gui ..`` and make sure you fill in where opencv was built.
|
|
|
|
#. Then click ``configure`` and then ``generate``. If it's OK, **quit cmake-gui**
|
|
|
|
#. Run ``make -j4`` *(the ``-j4`` is optional, it just tells the compiler to build in 4 threads)*. Make sure it builds.
|
|
|
|
#. Start ``eclipse`` . Put the workspace in some directory but **not** in ``foo`` or ``foo\\build``
|
|
|
|
#. Right click in the ``Project Explorer`` section. Select ``Import`` And then open the ``C/C++`` filter. Choose *Existing Code* as a Makefile Project``
|
|
|
|
#. Name your project, say *helloworld*. Browse to the Existing Code location ``foo\\build`` (where you ran your cmake-gui from). Select *Linux GCC* in the *"Toolchain for Indexer Settings"* and press *Finish*.
|
|
|
|
#. Right click in the ``Project Explorer`` section. Select ``Properties``. Under ``C/C++ Build``, set the *build directory:* from something like ``${workspace_loc:/helloworld}`` to ``${workspace_loc:/helloworld}/build`` since that's where you are building to.
|
|
|
|
a. You can also optionally modify the ``Build command:`` from ``make`` to something like ``make VERBOSE=1 -j4`` which tells the compiler to produce detailed symbol files for debugging and also to compile in 4 parallel threads.
|
|
|
|
#. Done!
|
|
|
|
|
|
|