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.

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

myOpenCV_Win10_Visual studio 2015

作業系統：Windows 10
開發工具：Visual Studio 2015
OpenCV版本：3.3.0   (opencv-3.3.0-vc14.exe 安裝位置為C:\opencv)

1. 修改環境變數

本機 → 內容 → 進階系統設定 → 環境變數 → path → 編輯

新增以下資料：
C:\OpenCV3.3\opencv\build\x64\vc14\bin


2. 開啟 Visual Studio 2015 並且新增專案

新增專案 → 左側「Visual C++」 → Win32 主控台應用程式→ 輸入專案名稱 → 確定 → 下一步 → 完成



3. 點選上方的「專案」→「屬性」→ 調整「平台」為“x64”



4. 對「VC++目錄」與「連結器」進行調整

設定VC++目錄 →在「Include目錄」增加“C:\OpenCV3.3\opencv\build\include”

設定VC++目錄 →在「程式庫目錄」增加“C:\OpenCV3.3\opencv\build\x64\vc14\lib”

設定連結器 →「輸入」 →在「其他相依性」增加

“opencv_world330d.lib”





5. 調整專案平台為「x64」



6. 新增 Visual C++檔於專案

「專案」 →「加入新項目」 →「C++檔(.cpp)」 →「新增」

7. 測試是否連結成功

撰寫一開啟圖檔的程式碼來測試是否連結成功

opencv 影像讀取儲存 - 指令

從硬碟讀取檔案，並將影像秀在螢幕上，當使用者按下任一鍵，
從硬碟讀取檔案將影像設定成灰階圖，把影像儲存在硬碟，並將影像秀在螢幕上，
當使用者按下任一鍵，或是關閉視窗後程式終止：

#include <cstdio>
#include <opencv2/opencv.hpp>
using namespace cv;

int main(){
    //Show原影像
    Mat img1 = imread("lena.jpg",CV_LOAD_IMAGE_UNCHANGED);
    namedWindow("Display CV_LOAD_IMAGE_UNCHANGED", WINDOW_AUTOSIZE);
    imshow("Display CV_LOAD_IMAGE_UNCHANGED", img1);
    waitKey(0);

    //Show灰階影像
    Mat img2 = imread("lena.jpg",CV_LOAD_IMAGE_GRAYSCALE);
    imwrite("output.jpg",img2);
    namedWindow("Display CV_LOAD_IMAGE_GRAYSCALE", WINDOW_AUTOSIZE);
    imshow("Display CV_LOAD_IMAGE_GRAYSCALE", img2);
    waitKey(0);

    return 0;
}

Ref:
http://monkeycoding.com/?p=540

Install opencv3.2 on centos7 - 安裝 指令

Install opencv3.2 on centos7

1.Download
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/

20170802
[hen@localhost 下載]$ ll
總計 80112
-rw-rw-r--. 1 hen hen 82033498  8月  2 12:15 opencv-3.2.0.zip
[hen@localhost 下載]$ md5sum opencv-3.2.0.zip
bfc6a261eb069b709bcfe7e363ef5899  opencv-3.2.0.zip

2. Require
yum install cmake gcc gtk2-devel numpy pkconfig
yum install gcc-c++
yum install epel-release
yum install libdc1394-devel
yum install libv4l-devel
yum install gstreamer-plugins-base-devel

3. Make
unzip opencv-3.2.0.zip
cd opencv-3.2.0/
# pwd
/root/opencv/opencv-3.2.0
mkdir build
cd build/
cmake -D CMAKE_BUILD_TYPE=DEBUG -D CMAKE_INSTALL_PREFIX=/usr/local ..
make
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/


5.Test
wget https://raw.githubusercontent.com/kyshel/template/master/src/hello_cv.cpp
wget https://raw.githubusercontent.com/kyshel/template/master/file/lena.jpg
g++ -o hello_cv hellocv.cpp `pkg-config opencv --cflags --libs`
./hello_cv lena.jpg lena_gray.jpg

[root@localhost ~]# rpm -qa|grep cmake
cmake-2.8.12.2-2.el7.x86_64


Ref:http://www.linuxfromscratch.org/blfs/view/cvs/general/opencv.html