在Android Studio中安裝OpenCV SDK

1. 安裝 Cmake （編譯工具）， NDK （環境）， LLDB （調試器）

Ubuntu Linux 安裝 Oracle JDK 步驟

Ubuntu Linux 安裝 Oracle JDK 步驟

apt-get install ant
# dpkg --get-selections | grep ant

 在 Ubuntu 安裝 Oracle JDK
 需要先安裝以下套件:
 #apt-get install python-software-properties
 #apt-get install software-properties-common

安裝 Java 8 了
用 PPA (Personal Package Archives)
 #add-apt-repository ppa:webupd8team/java
 #apt-get update
 #apt-get install oracle-java8-installer

check jdk:
root@ubuntulab1:~# java -version
java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)

root@ubuntulab1:~# date
二  4月 24 11:00:27 CST 2018
root@ubuntulab1:~# java -version
java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)

root@ubuntulab1:~# dpkg --get-selections | grep ant
ant install
ant-optional install
enchant install
libenchant1c2a:amd64 install
wpasupplicant install

root@ubuntulab1:~# dpkg --get-selections | grep java
ca-certificates-java install
gir1.2-javascriptcoregtk-4.0:amd64 install
java-common install
libjavascriptcoregtk-4.0-18:amd64 install
oracle-java8-installer install
oracle-java8-set-default install


root@ubuntulab1:~# ll /usr/lib/jvm/
total 24
drwxr-xr-x   4 root root 4096  4月 24 10:56 ./
drwxr-xr-x 149 root root 4096  4月 24 10:56 ../
lrwxrwxrwx   1 root root   24  2月 26  2016 default-java -> java-1.8.0-openjdk-amd64/
lrwxrwxrwx   1 root root   20  3月 14 20:58 java-1.8.0-openjdk-amd64 -> java-8-openjdk-amd64/
-rw-r--r--   1 root root 2600  3月 14 20:58 .java-1.8.0-openjdk-amd64.jinfo
drwxr-xr-x   7 root root 4096  4月 11 14:43 java-8-openjdk-amd64/
drwxr-xr-x   8 root root 4096  4月 24 10:56 java-8-oracle/
-rw-r--r--   1 root root 2643  4月 24 10:56 .java-8-oracle.jinfo

Installing OpenCV for Java(ubuntu)

Installing OpenCV for Java(ubuntu)
Ubuntu Linux 安裝 OpenCV 步驟

1. Download
   opencv-3.4.1.zip
   opencv_contrib-3.4.1.tar.gz

2. Required Packages
   apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
   apt-get install ant
   安裝 Oracle JDK:
 
   export JAVA_HOME=/usr/lib/jvm/java-8-oracle
   export JRE_HOME=/usr/lib/jvm/java-8-oracle/jre

3. make
   cmake -D CMAKE_BUILD_TYPE=DEBUG -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.4.1/modules/ ..
   make -j30
   make install

4. config
   root:
   echo '/usr/local/lib/' >> /etc/ld.so.conf.d/opencv.conf
   執行 ldconfig 將 /etc/ld.so.conf 的資料讀入快取當中
   將動態函式庫載入快取記憶體當中

   user:
   export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig/

   env:
   PKG_CONFIG_PATH=:/usr/local/lib/pkgconfig/

手動安裝OpenCV Manager

手動安裝OpenCV Manager
If Google Play is not available (i.e. on emulator, developer board, etc), you can install it manually using adb tool:

1. copy OpenCV-android-sdk\apk\OpenCV_3.4.1_Manager_3.41_x86_64.apk      D:\Android\SDK\platform-tools
2. D:\Android\SDK\platform-tools>adb install OpenCV_3.4.1_Manager_3.41_x86_64.apk
   Success

Reference:
 1. Android OpenCV Manager
    https://docs.opencv.org/2.4/platforms/android/service/doc/index.html

 2. OpenCV 2.4.13.6 documentation » OpenCV4Android Reference » Android OpenCV Manager
    https://docs.opencv.org/2.4/platforms/android/service/doc/UseCases.html#manager-selection

使用eclipse 建立 OpenCV Java Project

使用eclipse 建立 OpenCV Java Project

1. 先在 eclipse 建立 Java Project 取名為 HelloOpenCV

2. 選取Project資料夾(HelloOpenCV)，按右鍵點選 Build Path >  按 [Add Library...]

3. 選 User Library > 按 [Next] > 勾選 opencv (User Library) 按[Finish]即完成Project的設定.

安裝 Eclipse IDE for Java Developers version

安裝 Eclipse IDE for Java Developers version

下載 Eclipse IDE for Java Developers version

1. Download and Install Eclipse
#curl -O http://ftp.jaist.ac.jp/pub/eclipse/technology/epp/downloads/release/oxygen/1a/eclipse-java-oxygen-1a-linux-gtk-x86_64.tar.gz
# ll
-rw-r--r--. 1 root   root   186642081  2月 21 11:51 eclipse-java-oxygen-1a-linux-gtk-x86_64.tar.gz

Extract Eclipse package to your desired directory (Ex. /opt).
# tar -zxvf eclipse-java-oxygen-1a-linux-gtk-x86_64.tar.gz -C /opt
# ll /opt
drwxr-xr-x. 8 root root 4096 10月 10 08:21 eclipse

Symlink Eclipse executable to /usr/bin path.
#ln -s /opt/eclipse/eclipse /usr/bin/eclipse
#ll /opt/eclipse/eclipse
-rwxr-xr-x. 1 root root 71473 10月  9 18:00 /opt/eclipse/eclipse



2. Setup Launcher
Create Gnome launcher.

#vi /usr/share/applications/eclipse-4.7.desktop
Place the following content in the above file.

[Desktop Entry]
Encoding=UTF-8
Name=Eclipse 4.7
Comment=Eclipse Oxygen
Exec=/usr/bin/eclipse
Icon=/opt/eclipse/icon.xpm
Categories=Application;Development;Java;IDE
Version=1.0
Type=Application
Terminal=0

Installing OpenCV for Java

Install OpenCV 3.x under Linux(centos7)

1.Download:下載opencv檔案
http://opencv.org/opencv-3-2.html

The latest version can be downloaded from SourceForge and GitHub:
https://sourceforge.net/projects/opencvlibrary/files/opencv-unix/3.2.0/

#ll
-rw-rw-r--. 1 hen hen 82033498  8月  2 12:15 opencv-3.2.0.zip
#md5sum opencv-3.2.0.zip
bfc6a261eb069b709bcfe7e363ef5899  opencv-3.2.0.zip

2. Require:準備要安裝opencv的環境
#yum install cmake
#yum install ant

3. Make
#mkdir buildjava
#cd buildjava/
#cmake -D BUILD_SHARED_LIBS=OFF -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.2.0/modules ..
 -- General configuration for OpenCV 3.2.0
 --   Java:
 --     ant: /bin/ant (ver 1.9.2)
 --     JNI: /usr/lib/jvm/java/include /usr/lib/jvm/java/include/linux /usr/lib/jvm/java/include
 --     Java wrappers: YES
 --     Java tests:    YES

#make -j4

#make -j4 install

在eclipse 安裝 OpenCV Java 作業環境 (centos7)

在eclipse 安裝 OpenCV Java 作業環境 (centos7)
Set up OpenCV for Java in Eclipse (centos7)

1. 執行eclipse
Command line:
#eclipse
or GUI:
Application >> Programming >> Eclipse.

2. 點選 Window(Menu) > Preferences >  Build Path > User Libraries 

3. 點選 New... 按鈕
輸入一個名稱 opencv ，按下OK完成後

4. 點選 opencv 後，再點選 [Add External JARs...] 按鈕
並且點選 opencv-320.jar 的資料夾，
(我的是放在 /usr/local/share/OpenCV/java)加入 jar 檔.

5. 加入 jar 檔後
點選 Native library location 再點選  [Edit]按鈕

6. 點選[External Folder...]按鈕，加入Location Path:/usr/local/share/OpenCV/java