//---------------------------------【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/opencv.hpp>
using namespace cv;
using namespace std;
//-----------------------------------【宏定义部分】--------------------------------------------
// 描述:定义一些辅助宏
//------------------------------------------------------------------------------------------------
#define WINDOW_NAME "【程序窗口】" //为窗口标题定义的宏
//-----------------------------------【全局函数声明部分】------------------------------------
// 描述:全局函数的声明
//------------------------------------------------------------------------------------------------
void on_MouseHandle(int event, int x, int y, int flags, void* param);
void DrawRectangle( cv::Mat& img, cv::Rect box );
void ShowHelpText( );
void colorReduce(cv::Mat& , Point & , int );
//-----------------------------------【全局变量声明部分】-----------------------------------
// 描述:全局变量的声明
//-----------------------------------------------------------------------------------------------
Rect g_rectangle;
bool g_bDrawingBox = false;//是否进行绘制
RNG g_rng(12345);
//-----------------------------------【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( int argc, char** argv )
{
//【0】改变console字体颜色
system("color 9F");
//【0】显示欢迎和帮助文字
ShowHelpText();
//【1】准备参数
g_rectangle = Rect(-1,-1,0,0);
/*
Mat srcImage(600, 800,CV_8UC3), tempImage;
srcImage.copyTo(tempImage);
g_rectangle = Rect(-1,-1,0,0);
srcImage = Scalar::all(0);
*/
Mat srcImage=imread("img.jpg");
Mat tempImage;
srcImage.copyTo(tempImage);
cout<<srcImage.channels();
imshow("原图",srcImage);
cvtColor(srcImage,srcImage,COLOR_BGR2HSV);
cout<<srcImage.channels();
imshow("转换后图",srcImage);
//inRange(srcImage,cv::Scalar(0,80,160),cv::Scalar(50,220,255),srcImage);
//imshow("提取颜色",srcImage);
//【2】设置鼠标操作回调函数
namedWindow( WINDOW_NAME );
setMouseCallback(WINDOW_NAME,on_MouseHandle,(void*)&srcImage);
//【3】程序主循环,当进行绘制的标识符为真时,进行绘制
while(1)
{
srcImage.copyTo(tempImage);//拷贝源图到临时变量
// if( g_bDrawingBox ) DrawRectangle( tempImage, g_rectangle );//当进行绘制的标识符为真,则进行绘制
Point start=Point(g_rectangle.x,g_rectangle.y);
if( g_bDrawingBox)
colorReduce(tempImage,start,32);
imshow( WINDOW_NAME, tempImage );
if( waitKey( 10 ) == 27 ) break;//按下ESC键,程序退出
}
return 0;
}
void colorReduce(Mat& inputImage, Point & start, int div)
{
//参数准备
Mat outputImage = inputImage.clone(); //拷贝实参到临时变量
int rowNumber = start.y; //行数
int colNumber = start.x; //列数
if (outputImage.channels()==3)
{
int b=outputImage.at<Vec3b>(rowNumber,colNumber)[0];
int g=outputImage.at<Vec3b>(rowNumber,colNumber)[1];
int r=outputImage.at<Vec3b>(rowNumber,colNumber)[2];
cout<<"B:"<< b<<" "<<"G:"<<g<<" "<<"R:" << r<<" "<<endl;
}else
{
uchar* data = outputImage.ptr<uchar>(rowNumber); //获取第i行的首地址
int datatmep=data[colNumber];
cout<<"灰度值为"<< datatmep <<endl;
}
}
//--------------------------------【on_MouseHandle( )函数】-----------------------------
// 描述:鼠标回调函数,根据不同的鼠标事件进行不同的操作
//-----------------------------------------------------------------------------------------------
void on_MouseHandle(int event, int x, int y, int flags, void* param)
{
Mat& image = *(cv::Mat*) param;
switch( event)
{
//鼠标移动消息
case EVENT_MOUSEMOVE:
{
if( g_bDrawingBox )//如果是否进行绘制的标识符为真,则记录下长和宽到RECT型变量中
{
g_rectangle.width = x-g_rectangle.x;
g_rectangle.height = y-g_rectangle.y;
}
}
break;
//左键按下消息
case EVENT_LBUTTONDOWN:
{
g_bDrawingBox = true;
g_rectangle =Rect( x, y, 0, 0 );//记录起始点
cout<<g_rectangle<<endl;
}
break;
//左键抬起消息
case EVENT_LBUTTONUP:
{
g_bDrawingBox = false;//置标识符为false
//对宽和高小于0的处理
if( g_rectangle.width < 0 )
{
g_rectangle.x += g_rectangle.width;
g_rectangle.width *= -1;
}
if( g_rectangle.height < 0 )
{
g_rectangle.y += g_rectangle.height;
g_rectangle.height *= -1;
}
//调用函数进行绘制
DrawRectangle( image, g_rectangle );
}
break;
}
}
//-----------------------------------【DrawRectangle( )函数】------------------------------
// 描述:自定义的矩形绘制函数
//-----------------------------------------------------------------------------------------------
void DrawRectangle( cv::Mat& img, cv::Rect box )
{
cv::rectangle(img,box.tl(),box.br(),cv::Scalar(g_rng.uniform(0, 255), g_rng.uniform(0,255), g_rng.uniform(0,255)));//随机颜色
}
//-----------------------------------【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OpenCV2版的第18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");
//输出一些帮助信息
printf("\n\n\n\t欢迎来到【鼠标交互演示】示例程序\n");
printf("\n\n\t请在窗口中点击鼠标左键并拖动以绘制矩形\n");
}