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This commit is contained in:
Andrey Pavlenko 2013-03-05 19:03:36 +04:00
parent 23fb570cbd
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186
doc/tutorials/introduction/desktop_java/java_dev_intro.rst
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@ -52,26 +52,26 @@ Build
Let's build OpenCV:
.. code-block:: bash
.. code-block:: bash
git clone git://github.com/Itseez/opencv.git
cd opencv
git checkout 2.4
mkdir build
cd build
git clone git://github.com/Itseez/opencv.git
cd opencv
git checkout 2.4
mkdir build
cd build
Generate a Makefile or a MS Visual Studio* solution, or whatever you use for
building executables in your system:
.. code-block:: bash
.. code-block:: bash
cmake -DBUILD_SHARED_LIBS=OFF ..
cmake -DBUILD_SHARED_LIBS=OFF ..
or
.. code-block:: bat
.. code-block:: bat
cmake -DBUILD_SHARED_LIBS=OFF -G "Visual Studio 10" ..
cmake -DBUILD_SHARED_LIBS=OFF -G "Visual Studio 10" ..
.. note:: When OpenCV is built as a set of **static** libraries (``-DBUILD_SHARED_LIBS=OFF`` option)
the Java bindings dynamic library is all-sufficient,
@ -81,9 +81,9 @@ Examine the output of CMake and ensure ``java`` is one of the modules "To be bui
If not, it's likely you're missing a dependency. You should troubleshoot by looking
through the CMake output for any Java-related tools that aren't found and installing them.
.. image:: images/cmake_output.png
:alt: CMake output
:align: center
.. image:: images/cmake_output.png
:alt: CMake output
:align: center
.. note:: If ``CMake`` can't find Java in your system set the ``JAVA_HOME``
environment variable with the path to installed JDK
@ -97,15 +97,15 @@ through the CMake output for any Java-related tools that aren't found and instal
Now start the build:
.. code-block:: bash
.. code-block:: bash
make -j8
make -j8
or
.. code-block:: bat
.. code-block:: bat
msbuild /m OpenCV.sln /t:Build /p:Configuration=Release /v:m
msbuild /m OpenCV.sln /t:Build /p:Configuration=Release /v:m
Besides all this will create a ``jar`` containing the Java interface (:file:`bin/opencv-244.jar`)
and a native dynamic library containing Java bindings and all the OpenCV stuff
@ -122,8 +122,8 @@ Java sample with Ant
* In this folder create the :file:`build.xml` file with the following content using any text editor:
.. code-block:: xml
:linenos:
.. code-block:: xml
:linenos:
<project name="SimpleSample" basedir="." default="rebuild-run">
@ -175,18 +175,18 @@ Java sample with Ant
</project>
.. note::
This XML file can be reused for building other Java applications.
It describes a common folder structure in the lines 3 - 12 and common targets
for compiling and running the application.
.. note::
This XML file can be reused for building other Java applications.
It describes a common folder structure in the lines 3 - 12 and common targets
for compiling and running the application.
When reusing this XML don't forget to modify the project name in the line 1,
that is also the name of the `main` class (line 14).
The paths to OpenCV `jar` and `jni lib` are expected as parameters
(``"${ocvJarDir}"`` in line 5 and ``"${ocvLibDir}"`` in line 37), but
you can hardcode these paths for your convenience.
See `Ant documentation <http://ant.apache.org/manual/>`_ for detailed description
of its build file format.
When reusing this XML don't forget to modify the project name in the line 1,
that is also the name of the `main` class (line 14).
The paths to OpenCV `jar` and `jni lib` are expected as parameters
(``"${ocvJarDir}"`` in line 5 and ``"${ocvLibDir}"`` in line 37), but
you can hardcode these paths for your convenience.
See `Ant documentation <http://ant.apache.org/manual/>`_ for detailed description
of its build file format.
* Create an :file:`src` folder next to the :file:`build.xml` file and a :file:`SimpleSample.java` file in it.
@ -336,66 +336,66 @@ First, download and install `SBT <http://www.scala-sbt.org/>`_ using the instruc
Next, navigate to a new directory where you'd like the application source to live (outside :file:`opencv` dir).
Let's call it "JavaSample" and create a directory for it:
.. code-block:: bash
.. code-block:: bash
cd <somewhere outside opencv>
mkdir JavaSample
cd <somewhere outside opencv>
mkdir JavaSample
Now we will create the necessary folders and an SBT project:
.. code-block:: bash
.. code-block:: bash
cd JavaSample
mkdir -p src/main/java # This is where SBT expects to find Java sources
mkdir project # This is where the build definitions live
cd JavaSample
mkdir -p src/main/java # This is where SBT expects to find Java sources
mkdir project # This is where the build definitions live
Now open :file:`project/build.scala` in your favorite editor and paste the following.
It defines your project:
.. code-block:: scala
.. code-block:: scala
import sbt._
import Keys._
import sbt._
import Keys._
object JavaSampleBuild extends Build {
def scalaSettings = Seq(
scalaVersion := "2.10.0",
scalacOptions ++= Seq(
"-optimize",
"-unchecked",
"-deprecation"
)
)
object JavaSampleBuild extends Build {
def scalaSettings = Seq(
scalaVersion := "2.10.0",
scalacOptions ++= Seq(
"-optimize",
"-unchecked",
"-deprecation"
)
)
def buildSettings =
Project.defaultSettings ++
scalaSettings
def buildSettings =
Project.defaultSettings ++
scalaSettings
lazy val root = {
val settings = buildSettings ++ Seq(name := "JavaSample")
Project(id = "JavaSample", base = file("."), settings = settings)
}
}
lazy val root = {
val settings = buildSettings ++ Seq(name := "JavaSample")
Project(id = "JavaSample", base = file("."), settings = settings)
}
}
Now edit :file:`project/plugins.sbt` and paste the following.
This will enable auto-generation of an Eclipse project:
.. code-block:: scala
.. code-block:: scala
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.1.0")
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.1.0")
Now run ``sbt`` from the :file:`JavaSample` root and from within SBT run ``eclipse`` to generate an eclipse project:
.. code-block:: bash
.. code-block:: bash
sbt # Starts the sbt console
> eclipse # Running "eclipse" from within the sbt console
sbt # Starts the sbt console
> eclipse # Running "eclipse" from within the sbt console
You should see something like this:
.. image:: images/sbt_eclipse.png
:alt: SBT output
:align: center
.. image:: images/sbt_eclipse.png
:alt: SBT output
:align: center
You can now import the SBT project to Eclipse using :guilabel:`Import ... -> Existing projects into workspace`.
Whether you actually do this is optional for the guide;
@ -404,25 +404,25 @@ we'll be using SBT to build the project, so if you choose to use Eclipse it will
To test that everything is working, create a simple "Hello OpenCV" application.
Do this by creating a file :file:`src/main/java/HelloOpenCV.java` with the following contents:
.. code-block:: java
.. code-block:: java
public class HelloOpenCV {
public static void main(String[] args) {
System.out.println("Hello, OpenCV");
}
}
public class HelloOpenCV {
public static void main(String[] args) {
System.out.println("Hello, OpenCV");
}
}
Now execute ``run`` from the sbt console, or more concisely, run ``sbt run`` from the command line:
.. code-block:: bash
.. code-block:: bash
sbt run
sbt run
You should see something like this:
.. image:: images/sbt_run.png
:alt: SBT run
:align: center
.. image:: images/sbt_run.png
:alt: SBT run
:align: center
Running SBT samples
-------------------
@ -433,17 +433,17 @@ First, create a :file:`lib/` folder and copy the OpenCV jar into it.
By default, SBT adds jars in the lib folder to the Java library search path.
You can optionally rerun ``sbt eclipse`` to update your Eclipse project.
.. code-block:: bash
.. code-block:: bash
mkdir lib
cp <opencv_dir>/build/bin/opencv_<version>.jar lib/
sbt eclipse
mkdir lib
cp <opencv_dir>/build/bin/opencv_<version>.jar lib/
sbt eclipse
Next, create the directory :file:`src/main/resources` and download this Lena image into it:
.. image:: images/lena.png
:alt: Lena
:align: center
.. image:: images/lena.png
:alt: Lena
:align: center
Make sure it's called :file:`"lena.png"`.
Items in the resources directory are available to the Java application at runtime.
@ -451,9 +451,9 @@ Items in the resources directory are available to the Java application at runtim
Next, copy :file:`lbpcascade_frontalface.xml` from :file:`opencv/data/lbpcascades/` into the :file:`resources`
directory:
.. code-block:: bash
.. code-block:: bash
cp <opencv_dir>/data/lbpcascades/lbpcascade_frontalface.xml src/main/resources/
cp <opencv_dir>/data/lbpcascades/lbpcascade_frontalface.xml src/main/resources/
Now modify src/main/java/HelloOpenCV.java so it contains the following Java code:
@ -517,21 +517,21 @@ You will also get errors if you try to load OpenCV when it has already been load
Now run the face detection app using ``sbt run``:
.. code-block:: bash
.. code-block:: bash
sbt run
sbt run
You should see something like this:
.. image:: images/sbt_run_face.png
:alt: SBT run
:align: center
.. image:: images/sbt_run_face.png
:alt: SBT run
:align: center
It should also write the following image to :file:`faceDetection.png`:
.. image:: images/faceDetection.png
:alt: Detected face
:align: center
.. image:: images/faceDetection.png
:alt: Detected face
:align: center
You're done!
Now you have a sample Java application working with OpenCV, so you can start the work on your own.