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//---------------------------------【头文件、命名空间包含部分】---------------------------
// 描述：包含程序所使用的头文件和命名空间
//-------------------------------------------------------------------------------------
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
using namespace cv;
using namespace std;
//-----------------------------------【宏定义部分】----------------------------------
// 描述：定义一些辅助宏
//-------------------------------------------------------------------------------------
#define WINDOW_NAME1 "【原始图窗口】" //为窗口标题定义的宏
#define WINDOW_NAME2 "【效果图窗口】" //为窗口标题定义的宏
//-----------------------------------【全局变量声明部分】-------------------------------
// 描述：全局变量的声明
//------------------------------------------------------------------------------------
Mat g_srcImage; Mat g_grayImage;
int g_nThresh = 50;
int g_maxThresh = 255;
RNG g_rng(12345);
Mat srcImage_copy = g_srcImage.clone();
Mat g_thresholdImage_output;
vector<vector<Point> > g_vContours;
vector<Vec4i> g_vHierarchy;
//----------------------------【全局函数声明部分】--------------------------------------
// 描述：全局函数的声明
//-------------------------------------------------------------------------------------
static void ShowHelpText( );
void on_ThreshChange(int, void* );
void ShowHelpText();
//-----------------------【main( )函数】------------------------------------------
// 描述：控制台应用程序的入口函数，我们的程序从这里开始执行
//------------------------------------------------------------------------------------
int main( )
{
system("color 3F");
ShowHelpText();
// 加载源图像
g_srcImage = imread( "2007_000804.jpg", 1 );
// 将原图转换成灰度图并进行模糊降
cvtColor( g_srcImage, g_grayImage, COLOR_BGR2GRAY );
blur( g_grayImage, g_grayImage, Size(3,3) );
// 创建原图窗口并显示
namedWindow( WINDOW_NAME1, WINDOW_AUTOSIZE );
imshow( WINDOW_NAME1, g_srcImage );
//创建滚动条
createTrackbar( " 阈值:", WINDOW_NAME1, &g_nThresh, g_maxThresh, on_ThreshChange );
on_ThreshChange( 0, 0 );//调用一次进行初始化
waitKey(0);
return(0);
}
//---------------------------【thresh_callback( )函数】----------------------------------
// 描述：回调函数
//-------------------------------------------------------------------------------------
void on_ThreshChange(int, void* )
{
// 对图像进行二值化，控制阈值
threshold( g_grayImage, g_thresholdImage_output, g_nThresh, 255, THRESH_BINARY );
// 寻找轮廓
findContours( g_thresholdImage_output, g_vContours, g_vHierarchy, RETR_TREE, CHAIN_APPROX_SIMPLE, Point(0, 0) );
// 遍历每个轮廓，寻找其凸包
vector<vector<Point> >hull( g_vContours.size() );
for( unsigned int i = 0; i < g_vContours.size(); i++ )
{
convexHull( Mat(g_vContours[i]), hull[i], false );
}
// 绘出轮廓及其凸包
Mat drawing = Mat::zeros( g_thresholdImage_output.size(), CV_8UC3 );
Mat drawing1;
cv::cvtColor(g_grayImage, drawing1, cv::COLOR_GRAY2BGR);
Mat drawing2 = Mat::zeros(g_thresholdImage_output.size(), CV_8UC3);
for(unsigned int i = 0; i< g_vContours.size(); i++ )
{
Scalar color = Scalar( g_rng.uniform(0, 255), g_rng.uniform(0,255), g_rng.uniform(0,255) );
drawContours( drawing, g_vContours, i, color, 1, 8, vector<Vec4i>(), 0, Point() );
drawContours( drawing, hull, i, color, 1, 8, vector<Vec4i>(), 0, Point() );
drawContours( drawing1, hull, i, color, 1, 8, vector<Vec4i>(), 0, Point() );
drawContours(drawing2, g_vContours, i, color, 1, 8, vector<Vec4i>(), 0, Point() );
}
// 显示效果图
imshow( WINDOW_NAME2, drawing );
imshow( "hull", drawing1);
imshow( "Contours", drawing2);
}
//-----------------------------------【ShowHelpText( )函数】-----------------------------
// 描述：输出一些帮助信息
//-------------------------------------------------------------------------------------
void ShowHelpText()
{
//输出欢迎信息和OpenCV版本
printf("\n\n\t\t\t非常感谢购买《OpenCV3编程入门》一书！\n");
printf("\n\n\t\t\t此为本书OpenCV3版的第72个配套示例程序\n");
printf("\n\n\t\t\t 当前使用的OpenCV版本为：" CV_VERSION );
printf("\n\n------------------------------------------------------------------\n");
}
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