调试通过的c++项目。作用：实现图片在窗口的交互，鼠标单击选取图像区域

#include "cvut.h" //在工程目录下cvut.h、cvutImage.h、cvutMatrix.h、cvutSeq.h、cvutUtil.h #include "cv.h" using namespace cvut; //函数声明： int choose_rect(char**); void on_mouse( int , int , int , int , void* ); int clktime=0; //全局变量1 鼠标单击时间变量 CvRect work_rect; //全局变量2 存储矩形区域信息 int main( ) { char* names[] ={ "./images/Image1.bmp", "./images/Image2.bmp", "./images/Image3.bmp", //子文件夹下的各个图片 "./images/Image4.bmp", "./images/Image5.bmp", "./images/Image6.bmp", "./images/Image7.bmp", "./images/Image8.bmp", "./images/Image9.bmp", "./images/Image10.bmp", "./images/Image11.bmp", "./images/Image12.bmp",}; choose_rect(names); cout<<"done!"<<endl; //显示完成 return 0; } //选择图像的矩形区域的函数———————————————— int choose_rect(char** names) { extern int clktime; clktime=1; IplImage *img=0; img = cvLoadImage(names[0]); // load image 第一张图像 if(!img) { printf("could not load file!"); return -1; } cvNamedWindow("mainwin",0); cvMoveWindow("mainwin",100,50); cvResizeWindow("mainwin",900,680); //mainwin窗口的缩放 cvShowImage("mainwin",img); //在mainwin窗口显示img cvSetMouseCallback( "mainwin", on_mouse, 0 ); while(clktime<3) //循环等待（原值为1，on_mouse处理两次增至3跳出） if(cvWaitKey(10)>=0) { goto loop; } loop:cvReleaseImage(&img); //矩形区域获取结束 cvDestroyWindow("mainwin"); return 0; } ///on mouse函数:———————————————————————— // 鼠标单击事件的处理，手动提取矩形区域角点、保存。 void on_mouse( int event, int x, int y, int flags, void* param ) { //左键按下 if( event==CV_EVENT_LBUTTONUP ) { cout<<"point(x,y)"<<clktime<<":"<<x<<" "<<y<<endl; //显示角点的位置 extern CvRect work_rect; //全局变量的声明 extern int clktime; if(clktime==1) { work_rect.x = x; work_rect.y = y; } else { work_rect.width = x-work_rect.x; work_rect.height = y-work_rect.y; } clktime++; //矩形区域下一点 } return; }