Opencv实现画笔功能

本文实例为大家分享了Opencv实现画笔功能的具体代码,供大家参考,具体内容如下

#include<iostream>

#include<opencv2/opencv.hpp>

using namespace std;

using namespace cv;

Rect g_rectangle;

bool g_bDrawing = false;

RNG g_rng(12345);

Point g_nCurrPoint;

int g_nThick = 0, g_nBlue = 255, g_nGreen = 255, g_nRed = 0;

/*注意:不能在毁掉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)

{

//移动鼠标的时候

case CV_EVENT_MOUSEMOVE:

{

g_nCurrPoint = Point(x, y);

}

break;

//点击鼠标左键时

case CV_EVENT_LBUTTONDOWN:

{

g_bDrawing = true;

g_nCurrPoint = Point(x, y);

}

break;

//松开鼠标左键时

case CV_EVENT_LBUTTONUP:

{

g_bDrawing = false;

}

break;

}

}

int main()

{

Mat srcImage(600, 800, CV_8UC3);

Mat tempImage;

srcImage.copyTo(tempImage);

srcImage = Scalar::all(0);

namedWindow("【鼠标事件窗口】", 0);

setMouseCallback("【鼠标事件窗口】", onMouse, (void *)&srcImage);

namedWindow("【滚动条窗口】", 0);

createTrackbar("thick", "【滚动条窗口】", &g_nThick, 100, 0);

createTrackbar("Blue", "【滚动条窗口】", &g_nBlue, 255, 0);

createTrackbar("Green", "【滚动条窗口】", &g_nGreen, 255, 0);

createTrackbar("Red", "【滚动条窗口】", &g_nRed, 255, 0);

char key;

while (1)

{

if (g_bDrawing)

{

circle(srcImage, g_nCurrPoint, 0, Scalar(g_nBlue, g_nGreen, g_nRed), g_nThick + 1);

}

imshow("【鼠标事件窗口】", srcImage);

key = waitKey(1);

if (key == 27)

break;

if (key == '1')

srcImage = Scalar::all(0);

/*DrawRectangle(srcImage, g_rectangle);

imshow(WINDOW_NAME, srcImage);

if (waitKey(10) == 27)

break;*/

}

return 0;

}

按1是清除画面

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。

以上是 Opencv实现画笔功能 的全部内容, 来源链接: utcz.com/p/245481.html

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