Opencv实现曼水填充算法-floodFill函数

#include<iostream>
#include<opencv2/opencv.hpp>

using namespace std;
using namespace cv;

bool g_bDrawingBox = false;
Point g_CurrPoint;

void onMouse(int event, int x, int y, int flag, void *param);

int main()
{
Mat srcImage = imread("bear.jpg");
Rect rect;

//鼠标事件
namedWindow("【漫水填充窗口】");
setMouseCallback("【漫水填充窗口】", onMouse, (void *)&srcImage);
while (1)
{
if (g_bDrawingBox)
floodFill(srcImage, g_CurrPoint, Scalar(0, 0, 255), &rect, Scalar(20, 20, 20), Scalar(20, 20, 20));

imshow("【漫水填充窗口】", srcImage);

if (waitKey(10) == 27)
break;
}

return 0;
}

/*注意：不能在回调函数中写入未初始化的矩阵类，所以需要用时，需要写一个标志位，然后再在while(1)循环内使用*/
void onMouse(int event, int x, int y, int flag, void *param)
{
Mat &img = *(cv::Mat*)param;

switch (event)
{
//点击鼠标左键时
case CV_EVENT_LBUTTONDOWN:
{
g_bDrawingBox = false;
g_CurrPoint = Point(x, y);
}
break;
//松开鼠标左键时
case CV_EVENT_LBUTTONUP:
{
g_bDrawingBox = true;
}
break;
}
}