Configure and test OpenCV 2.4.9 in Ubuntu 14.04

Configure and test OpenCV 2.4.9 in Ubuntu 14.04

The purpose of writing this article is to facilitate your study. I spent half a day searching for information on the Internet. I hope it will be helpful for you. My Ubuntu version is 14.04.

1. Preparations
Install GCC:
Sudo apt-get install build-essential

Install CMake

Sudo apt-get install cmake

Install Git (optional)

Sudo apt-get install git

Install GTK

Sudo apt-get install libgtk2.0-dev

Install pkg-config

Sudo apt-get install pkg-config

Install Python

Sudo apt-get install python3.2-dev

Install Numpy

Sudo apt-get install python-numpy

Install a media package:

Sudo apt-get install ffmpeg // I have not installed the package successfully, but it will not be affected in subsequent tests.

Install an optional media package:

Sudo apt-get install libavcodec-dev libavformat-devlibswscale-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev

2. Download and create OpenCV

I use opencv2.4.9. the compressed package name on the official website is opencv-2.4.9.zip, which can be downloaded for free on the official website.

Decompress opencv-2.4.9.zip unzip command: Decompress the package to the directory where the package is located.

Unzip opencv-2.4.9

Run the following command:

Cd opencv-2.4.9mkdir release
Cd release
Cmake-D CMAKE_BUILD_TYPE = RELEASE-DCMAKE_INSTALL_PREFIX =/usr/local ..
Make
Sudo make install

 

Add a line of code/usr/local/lib to the/etc/ld. so. conf file.

(Permission issues may occur during the modification process. If permission issues occur, enter the following command:

Sudo su

Used to obtain root permissions

Then

Gedit/etc/ld. so. conf

Edit files)

Sudo/sbin/ldconfig-v
Then follow the change volume
Sudo gedit/etc/bash. bashrc is also added in the last line
PKG_CONFIG_PATH = $ PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
Export PKG_CONFIG_PATH

Write a hello. cpp file in the home folder for testing, including # include <opencv2/core. hpp> and enter

G ++ 'pkg-config -- cflags -- libs opencv 'Hello. cpp-o hello for compilation

If no error is reported, opencv is configured successfully.

 

3. Test in qt

# Include <iostream>
# Include <opencv2/core. hpp>
# Include <opencv2/highgui. hpp>
# Include <opencv2/imgproc. hpp>
Using namespace cv;
Using namespace std;

Int main ()
{
NamedWindow ("src ");
Mat img = imread ("/home/gzhao/lena.jpg ");

If (! Img. data ){
Cout <"file not fount" <endl;
Return 1;
}
Else {
Imshow ("src", img );
WaitKey ();
Return 0;
}
}
Add the following configuration in the XXX. pro file:

INCLUDEPATH + =/usr/local/include \
/Usr/local/include/opencv \
/Usr/local/include/opencv2

LIBS + =/usr/local/lib/libopencv_highgui.so \
/Usr/local/lib/libopencv_core.so \
/Usr/local/lib/libopencv_imgproc.so

You need to put the home address under the home path in advance.

Running result diagram:

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