Opencv实现画笔功能
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2022-06-17 20:12:37
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#include u...
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。