-Author: Ethan Rublee
-email: ethan.rublee@gmail.com
-########################################################
-Prerequisites:
-########################################################
- android-ndk-r5b http://developer.android.com/sdk/ndk/index.html
- the official ndk with standalone toolchain
- android-cmake http://code.google.com/p/android-cmake/
- this is for the cmake toolchain for android
- mercurial
- sudo apt-get install mercurial
- cmake
- opencv (you should have this if you're reading this file :)
-
-########################################################
-Quick NDK Setup(ubuntu and bash):
-########################################################
-create some working directory:
- WORK=$HOME/android_dev
- cd $WORK
-
-now get the android-cmake project with mercurial
- hg clone https://android-cmake.googlecode.com/hg/ android-cmake
-
-there is a convenience script in there for pulling down and setting up the
-android ndk as a standalone toolchain
- cd android-cmake/scripts
- ./get_ndk_toolchain_linux.sh $WORK
-
-add the cmake toolchain location to your bashrc or otherwise export it to your env
- echo export ANDTOOLCHAIN=$WORK/android-cmake/toolchain/android.toolchain.cmake >> $HOME/.bashrc
-
-########################################################
-Quick opencv build(ubuntu and bash):
-########################################################
-Make sure you either source your bashrc or otherwise export the ANDTOOLCHAIN variable.
-
-There is a script in the android folder for running cmake with the proper cache
-variables set. It is recommended that you use this to setup a smake build directory.
- cd opencv/android
- sh ./cmake_android.sh
-
-You should now see a build directory, that is ready to be made.
- cd build
- make -j8
-
-That will build most of the opencv modules, except for those that don't make sense
-on android - gpu, etc..
-
-To install to the toolchain:
- make install
-########################################################
-Using opencv in you're cmake own projects.
-########################################################
-Use the cmake find script for opencv:
- find_package(OpenCV REQUIRED)
-
-Then when you run cmake, use:
- cmake -DCMAKE_TOOLCHAIN_FILE=$ANDTOOLCHAIN ..
-
-And direct your cmake cache for OpenCV_Dir to the path that you build opencv for android.
- something like : opencv/android/build
-
-To avoid setting the cmake cache for OpenCV_Dir, you can just "install" opencv to your
-android toolchain. Run the following from the opencv/android/build path:
- make install
-
-########################################################
-android targets
-########################################################
-You may wish to build android for multiple hardware targets.
-
-Just change the cmake cache ARM_TARGETS to either:
- "armeabi" "armeab-v7a" "armeab-v7a with NEON"
-
-You may install each of these to the toolchain, and they should be linked against
-properly via way of the android-cmake toolchain.
+See http://opencv.willowgarage.com/wiki/AndroidTrunk
\ No newline at end of file
+++ /dev/null
-= Android =
-Android is awesome, and so is OpenCV, so wouldn't it be awesomer if they could work together? Well they can, and its now officially supported in opencv trunk.
-= quick ubuntu opencv static libs build =
- * install swig {{{sudo apt-get install swig}}}
- * unzip the crystax ndk r4 to your home directory http://www.crystax.net/android/ndk-r4.php
- * svn up your opencv - from https://code.ros.org/svn/opencv/trunk/opencv
-{{{
-cd opencv/android
-mkdir build
-cd build
-cmake ..
-make
-}}}
-= Prerequisites =
- * swig 1.3 - stable version in your package manager or from cygwin or from http://swig.org/
- * crystax ndk r4 - http://www.crystax.net/android/ndk-r4.php - unzip/untar to your home directory for easy cmake locating
- * android sdk latest - http://developer.android.com/sdk/index.html
- * ant build system - for compiling android apps on command line
- * (optional) eclipse android sdk adt plugin and eclipse cdt http://developer.android.com/sdk/eclipse-adt.html
- * latest code from opencv svn trunk - from https://code.ros.org/svn/opencv/trunk/opencv
-= android ndk =
-This will not work with the official release of the android ndk.
-The official android ndk does not support c++ concepts fully like RTTI, exceptions, and most of the stl.
-Make sure you use the modified android ndk from crystax available at http://www.crystax.net/android/ndk-r4.php
-
-The android ndk, now referred to as the ndk, is the gcc toolchain for android, and is what creates the shared
-libraries for android that are loadable by android apps through a the Java Native Interface(JNI)
-
-Recommended install of the ndk is to unzip it to your home directory
-
-For example this is what mine looks like:
-{{{
-erublee@bde:~/android-ndk-r4-crystax$ ls
-build docs GNUmakefile ndk-build ndk-gdb README.TXT samples sources
-}}}
-
-= Android SDK =
-Please read the very well documented android sdk getting started instructions - http://developer.android.com/sdk/index.html and at least build and install a hello world app on your Android phone.
-
-== Android SDK tips ==
-I always add the android sdk tools directory to my path so i can run the adb from any where.
-
-On ubuntu, add the following to your {{{~/.bashrc}}}
-{{{
-export PATH=~/android-sdk-linux_x86/tools:$PATH
-}}}
-
-Install ant so that you can build from command line.
-
-Make sure your udev permissions are set for usb debug and that the phone itself is set to allow debugging
-http://developer.android.com/guide/developing/device.html#setting-up
-
-Nexus one users on ubuntu lucid should have the following udev file:
-
-{{{
-/etc/udev/rules.d/51-android.rules
-SUBSYSTEM=="usb", SYSFS{idVendor}=="18d1", MODE="0666"
-}}}
-
-see the following blog post on why http://alan.lamielle.net/2010/01/22/nexus-one-usb-in-ubuntu-9-10
-
-= How and What =
-The android port involves high jacking the existing cmake build files and replacing the define_opencv_module with android specific build commands.
-
-In particular the cmake based build creates android ndk build files and calls the android ndk to build opencv.
-
-== OpenCV static libs ==
-The main cmake build of opencv generates a static lib for each module and some of the 3rdparty libraries. These can then be linked against in your own android projects.
-
-the cmake build will also generate an android-opencv.mk file in the build folder. Include this file in your Android.mk files to link against the static libs.
-
-this would go in your Android.mk file. See the docs in the ndk for an explanation of LOCAL_LDLIBS and LOCAL_C_INCLUDES.
-{{{
-#define OPENCV_INCLUDES and OPENCV_LIBS
-include $(PATH_TO_OPENCV_ANDROID_BUILD)/android-opencv.mk
-
-LOCAL_LDLIBS += $(OPENCV_LIBS)
-
-LOCAL_C_INCLUDES += $(OPENCV_INCLUDES)
-}}}
-== OpenCV shared library ==
-There is an attempt at a library that is more generally useful for android that could also be linked against in your on projects. This project is under
-opencv/android/android-jni
-
-This uses swig to expose some functions to java. Also it implements a live camera preview interface, so that you can have access to the Android camera for live vision apps.
-
-== Apps ==
-A few sample apps that use the library are under opencv/android/apps
- * CVCamera is a complete example that uses the opencv static libs and the android-jni project
- * Calibration is a stand alone camera calibration app for your Android that is pure java and links against the android-jni project - use this app to make a camera.yml calibration file in your sdcard's home directory
- * more to come ...
-= steps =
-=== Static libs ===
-{{{
-cd opencv/android
-mkdir build
-cd build
-cmake ..
-make
-}}}
-this may take a while
-=== android-jni ===
-After the static libs are built, run make in the android-jni folder
-{{{
-cd opencv/android/android-jni
-make
-}}}
-That creates the swig wrappers and compiles the shared library.
-
-now run the ant based java build
-{{{
-sh ./project_create.sh
-ant debug
-}}}
-
-Now you're ready to use it in a sample
-=== CVCamera ===
-{{{
-cd opencv/android/apps/CVCamera
-sh build.sh
-}}}
-That builds the swig wrappers and shared library.
-
-Build the android apk ( the thing that gets installed on the phone )
-{{{
-sh project_create.sh
-ant debug
-}}}
-
-Now if everything worked, try to install it. Connect your device and run the following
-{{{
-ant install
-}}}
-
-Run it, press menu to see options - right now it can draw fast, star, and surf feature points on the live preview image.
-=== Calibration ===
-{{{
-sh project_create.sh
-ant debug
-ant install
-}}}
-
-To run the app, make sure that the sdcard is not mounted on your computer and point the phone at a calibration pattern and snap away. When you have taken enough chessboards to satisfy yourself
-press the save button to have the camera calibarted. The calibration will be saved to /sdcard/opencv/calibration.yml
-
-Also see this app for how to make a slightly nicer camera ui than CVCamera.
-=== Troubles ===
-try to edit the local.env.mk file's that get created in CVCamera and android-jni to reflect your system.
-
-Also using cmake-gui or ccmake are good options to set up where your ndk directory are.
-
-Send questions/comments to Ethan Rublee ethan.rublee@gmail.com
-
-= Programming your own apps =
-Try to look at the samples - like CVCamera, for how to do this. A tutorial may be forth coming.
-
projects / platform / upstream / opencv.git / commitdiff