【OpenCV构造线段并提取轮廓】

• • CMakeLists.txt
  • C++代码实现
  • 运行结果
  • API查询链接
  • 支持原创，转载请备注出处，谢谢

project(TEST)
cmake_minimum_required(VERSION 2.8.12)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}  -std=c++11")
find_package(OpenCV)
include_directories(OpenCV_INCLUDE_DIRS)
add_executable(test test.cpp)
target_link_libraries(test
		opencv_core
		opencv_highgui
		opencv_imgproc
		opencv_imgcodecs
		)

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

int main()
{
	
    std::vector > contoursDest;
    
    cv::Mat image(500, 500, CV_8UC1, cv::Scalar(0));
    cv::Mat image2;

	// Check if the image is created successfully.
	if (!image.data)
	{
		std::cout << "Could not open or find the image" << std::endl;
		exit(EXIT_FAILURE);
	}

	
	cv::Point p1(100, 100), p2(400, 100); 
	
	cv::Scalar colorLine(255); 
	
	int thicknessLine = 7;
	
	
	cv::line(image, p1, p2, colorLine, thicknessLine, cv::LINE_AA);

	cv::imshow("window1", image);
	
	
    cv::threshold(image, image2, 100, 255, cv::THRESH_BINARY);
    
    cv::findContours(image2, contoursDest, cv::RETR_EXTERNAL, cv::CHAIN_APPROX_SIMPLE);
    cv::imshow("window2", image2);

    for (int i = 0; i < contoursDest.begin()->size(); ++i)
    {
        std::cout << "contoursDest222 x_" << i << " ( " << ((*contoursDest.begin()).begin() + i)->x  << ", " << ((*contoursDest.begin()).begin() + i)->y << ")" << std::endl;
    }
	
	cv::waitKey(0);

	return 0;
}

用鼠标滚轮可以进行缩放查看图片中的代价值，如下图所示

上面用到的cv接口都可以在下面链接中查询，小编就不赘叙了
链接: link.