鼠标操作

#include<opencv.hpp> using namespace cv; RNG rngs{ 12345 };//生成颜色的随机数 Rect rectangles; bool DrawingBox = false; //鼠标回调函数，根据不同的鼠标事件进行不同的操作 void on_Mouse(int event, int x, int y, int flags, void* param) { Mat& image = *(Mat*)param; switch (event){ //鼠标移动 case EVENT_MOUSEMOVE: if (DrawingBox) {//“是否绘制”标识符为真，记录矩形长宽 rectangles.width = x - rectangles.x; rectangles.height = y - rectangles.y; } break; //左键按下 case EVENT_LBUTTONDOWN: DrawingBox = true; rectangles = Rect(x, y, 0, 0);//记录起始点 break; //左键抬起 case EVENT_LBUTTONUP: DrawingBox = false; if (rectangles.width < 0) { rectangles.x += rectangles