OpenCVその３直線描画 #C++

Opencv
http://docs.opencv.org/trunk/doc/tutorials/introduction/linux_gcc_cmake/linux_gcc_cmake.html

cmake
http://www.wakayama-u.ac.jp/~chen/cmake/cmakecv.html

そのままですが前提.
gcc,OpenCV,CMakeインストール済み。

ステップ
1.MyLine.cpp
2.CMake file CMakeLists.txt
3.cmake make
4.Run

Using OpenCV with gcc and CMake
Note We assume that you have successfully installed OpenCV in your workstation.
The easiest way of using OpenCV in your code is to use CMake. A few advantages (taken from the Wiki):
No need to change anything when porting between Linux and Windows
Can easily be combined with other tools by CMake( i.e. Qt, ITK and VTK )
If you are not familiar with CMake, checkout the tutorial on its website.
Steps

Create a program using OpenCV
Let’s use a simple program such as DisplayImage.cpp shown below.

参考：http://opencv.jp/cookbook/opencv_drawing.html
少々、追加、変更しています。

MyLine.cpp

//MyLine.cpp
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>

using namespace cv;

int
main(int argc, char *argv[])
{
  Mat img = Mat::zeros(800, 900, CV_8UC3);

  // Red，太さ3，4近傍連結
  line(img, Point(100, 100), Point(400, 105), Scalar(0,0,200), 3, 4);  
  // Green，太さ5，8近傍連結
  line(img, Point(100, 200), Point(400, 205), Scalar(0,200,0), 5, 8);
  // Blue，太さ10，アンチエイリアス
  line(img, Point(100, 300), Point(400, 305), Scalar(200,0,0), 10, CV_AA);

  //add by ggggnonaka start
  //White Line 1,4
  line(img, Point(100, 400), Point(800, 400), Scalar(255,255,255), 1, 4);
  //Red Line 1,4
  line(img, Point(100, 500), Point(800, 500), Scalar(0,0,255), 1, 4);  
  //Blue，Line 10,AA
  line(img, Point(100, 600), Point(800, 600), Scalar(200,0,0), 10, CV_AA);
  //add by ggggnonaka end

  namedWindow("drawing", CV_WINDOW_AUTOSIZE|CV_WINDOW_FREERATIO);
  imshow("drawing", img);
  waitKey(0);
}
//end MyLine.cpp

Create a CMake file
Now you have to create your CMakeLists.txt file. It should look like this:

CMakeLists.txt

cmake_minimum_required (VERSION 2.6)

project( MyLine )
find_package( OpenCV REQUIRED )
add_executable( MyLine MyLine.cpp ) 
target_link_libraries( MyLine ${OpenCV_LIBS} )

Generate the executable
This part is easy, just proceed as with any other project using CMake:

cd <DisplayImage_directory>
cmake .
make

Run
./MyLine

Result