opencv抠图

代码如下：

// opencv_drawroi.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include 


using namespace std;
using namespace cv;



CvPoint prev_pt = {-1, -1};
Mat img;

Mat img_mask;
Mat dst;


void on_mouse(int event, int x, int y, int flags, void* )
{
	if(!img.data)
		return;
	if ( event == CV_EVENT_LBUTTONUP || !(flags & CV_EVENT_FLAG_LBUTTON))  //判断事件为松开鼠标左键或者不是左拖拽
	{
		prev_pt = cvPoint(-1, -1);
	}
	else if (event == CV_EVENT_LBUTTONDOWN)  //判断为按下左键
	{
		prev_pt = cvPoint(x,y);
	}
	else if ( event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON))  //判断移动鼠标并且左拖拽
	{
		CvPoint pt = cvPoint(x, y);
		if ( prev_pt.x < 0)
		{
			prev_pt = pt;
		}
		line(img_mask, prev_pt, pt, Scalar(0),2,8,0); //模板上划线
		line(img, prev_pt, pt, Scalar::all(255),2,8,0);          //原图上划线
		prev_pt = pt;
		imshow("image", img);
		
		
		
		
		
	}
	if (event == CV_EVENT_RBUTTONUP)
	{
		
		floodFill(img_mask,Point(x,y),Scalar(0));//填充抠图模板
		imshow("img_mask", img_mask);
		waitKey(0);
		img.copyTo(dst,img_mask);
		imshow("dst", dst);
		
		
	}

}



int _tmain(int argc, _TCHAR* argv[])
{
	
	Mat image = imread("C:\\Users\\sony\\Desktop\\111.png");
	image.copyTo(img);
	
	//将模板设置成白色
	 inpainted_mask.create(img.rows, img.cols, CV_8U); 
	 inpainted_mask.setTo(Scalar(255));
	//显示原图
	imshow("image",img);
	
	//显示模板原图
	imshow("watershed transform", img_mask);
	
	//鼠标回调函数
	cvSetMouseCallback("image",on_mouse,0);
	


	waitKey(0);
	return 0;
}

上述代码修改为：

// opencv_drawroi.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include 


using namespace std;
using namespace cv;



CvPoint prev_pt = {-1, -1};
Mat img;

Mat img_mask;
Mat dst;


void on_mouse(int event, int x, int y, int flags, void* )
{
	if(!img.data)
		return;
	if ( event == CV_EVENT_LBUTTONUP || !(flags & CV_EVENT_FLAG_LBUTTON))  //判断事件为松开鼠标左键或者不是左拖拽
	{
		prev_pt = cvPoint(-1, -1);
	}
	else if (event == CV_EVENT_LBUTTONDOWN)  //判断为按下左键
	{
		prev_pt = cvPoint(x,y);
	}
	else if ( event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON))  //判断移动鼠标并且左拖拽
	{
		CvPoint pt = cvPoint(x, y);
		if ( prev_pt.x < 0)
		{
			prev_pt = pt;
		}
		line(img_mask, prev_pt, pt, Scalar(0),2,8,0); //模板上划线
		line(img, prev_pt, pt, Scalar::all(255),2,8,0);          //原图上划线
		prev_pt = pt;
		imshow("image", img);





	}
	if (event == CV_EVENT_RBUTTONUP)
	{

		floodFill(img_mask,Point(x,y),Scalar(0));//填充抠图模板
		/*imshow("img_mask", img_mask);*/
		img.copyTo(dst,img_mask);
		imshow("dst", dst);


	}

}



int _tmain(int argc, _TCHAR* argv[])
{

	Mat image = imread("C:\\Users\\zj\\Desktop\\111.png");
	image.copyTo(img);

	//将模板设置成白色
	img_mask.create(img.rows, img.cols, CV_8U); 
	img_mask.setTo(Scalar(255));
	//显示原图
	imshow("image",img);
	

	////显示模板原图
	//imshow("watershed transform", img_mask);
	
	//鼠标回调函数
	cvSetMouseCallback("image",on_mouse,0);



	waitKey(0);
	return 0;
}

结果如下：