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Kuzma Kononov
Kuzma Kononov

Opencv 3.0.0 For Java Eclipse On Mac Osx UPDATED


Now the only two things that you will need are: the opencv-3xx.jar file located at \opencv\build\java and the opencv_java3xx.dll library located at \opencv\build\java\x64 (for 64-bit systems) or \opencv\build\java\x86 (for 32-bit systems). The 3xx suffix of each file is a shortcut for the current OpenCV version, e.g., it will be 300 for OpenCV 3.0 and 330 for OpenCV 3.3.




Opencv 3.0.0 For Java Eclipse On Mac Osx



To install OpenCV (with Java support) through Homebrew, you need to edit the opencv formula in Homebrew, to add support for Java:brew edit opencvIn the text editor that will open, change the line:-DBUILD_opencv_java=OFFin-DBUILD_opencv_java=ONthen, after saving the file, you can effectively install OpenCV:brew install --build-from-source opencv


After the installation of OpenCV, the needed jar file and the dylib library will be located at /usr/local/Cellar/opencv/3.x.x/share/OpenCV/java/, e.g., /usr/local/Cellar/opencv/3.3.1/share/OpenCV/java/.


Now open the terminal, go to the build folder of OpenCV and compile everything with the command: make -j. Notice that the -j flag tells make to run in parallel with the maximum number of allowed job threads, which makes the build theoretically faster.Wait for the process to be completed...If everything went well you should have opencv-3xx.jar in the /opencv/build/bin directory and libopencv_java3xx.so in the /opencv/build/lib directory. The 3xx suffix of each file is a shortcut for the current OpenCV version, e.g., it will be 300 for OpenCV 3.0 and 330 for OpenCV 3.3. This is everything you need.


In case of MacOS, if you installed OpenCV without Homebrew, you need to create a soft link with .dylib extension for the .so file. E.g., from the terminal, type:ln -s libopencv_java300.so libopencv_java300.dylib


Here we created a two dimensions opencv Point instance. Even if all the java packages included within the java interface to OpenCV are immediately available from the CLJ REPL, it's very annoying to prefix the Point. instance constructors with the fully qualified package name.


hello man i have compile gui opencv code im my computer and export runnable .jar file and run it in rasberry pi it give me this error when running it using this command in the terminalsudo java -jar myapp.jar


ok i have dont this all using opencv 2.4.9 and download all attachment in the google drive then how to compile my main.java file and include the javacv and javacpp and javacv-linux-arm from the terminal


That error looks like the java lib and native extensions are not expecting those methods that were probably changed in version of open CV 3.0.0 that you are using.When you are use these kind of native extensions you need to be careful with the versions


You can see my findings here. Initially compilation was a problem which i was trying out with cppbuild.sh provided with presets. Later on I compiled opencv-3.0.0 separately and then compiled presets which just worked. Right now things are in place, I have ARM builds for ffmpeg and other modules but JAVACV is throwing error that it could not find respective jars. Here is the git link: -presets/issues/52Hope you can help me out.


[ERROR] Failed to execute goal on project javacv: Could not resolve dependencies for project org.bytedeco:javacv:jar:1.2.2: The following artifacts could not be resolved: org.bytedeco.javacpp-presets:opencv:jar:3.1.0-1.2.2, org.bytedeco.javacpp-presets:ffmpeg:jar:3.0.2-1.2.2, org.bytedeco.javacpp-presets:flycapture:jar:2.9.3.43-1.2.2, org.bytedeco.javacpp-presets:libdc1394:jar:2.2.4-1.2.2, org.bytedeco.javacpp-presets:libfreenect:jar:0.5.3-1.2.2, org.bytedeco.javacpp-presets:videoinput:jar:0.200-1.2.2, org.bytedeco.javacpp-presets:artoolkitplus:jar:2.3.1-1.2.2, org.bytedeco.javacpp-presets:flandmark:jar:1.07-1.2.2: Failure to find org.bytedeco.javacpp-presets:opencv:jar:3.1.0-1.2.2 in was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -> [Help 1]


CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.Missing variable is:CMAKE_CXX_COMPILER_ENV_VARCMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.Missing variable is:CMAKE_CXX_COMPILERCMake Error: Could not find cmake module file: /home/pi/opencv-2.4.13/release/javacpp-presets/opencv/cppbuild/linux-arm/opencv-3.1.0/CMakeFiles/3.0.2/CMakeCXXCompiler.cmakeCMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.Missing variable is:CMAKE_C_COMPILER_ENV_VARCMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.Missing variable is:CMAKE_C_COMPILERCMake Error: Could not find cmake module file: /home/pi/opencv-2.4.13/release/javacpp-presets/opencv/cppbuild/linux-arm/opencv-3.1.0/CMakeFiles/3.0.2/CMakeCCompiler.cmake


Thanks a lot. I have been struggling for some time to include the extra modules.Updating opencv_contrib/modules//CMakeLists.txt i.e replacing WRAP python (as in the github repo) with WRAP java includes the module in jar.


My compilation of extra modules crashes with [javac] errors in all xfeatures2d java files. It states that Feature2D class is undefined, along with some other symbols in those files like nativeObj. I tried adding import org.opencv.features2d.Feature2D line in each java file but the error is still there, class Feature2D is unknown.


Hi Lee,As you might have already observed, I have used ndk 10e, opencv 3.0.0. And I actually forgot the version of cmake, I experimented while compiling this blog. However as the recent results stand, it should work well with cmake 3.4 too.


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