為什么總是未定義CV_EVENT_LBUTTONDOWN，求大神指導
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <stdio.h>
using namespace cv;
using namespace std;
cv::Mat org,dst,img,tmp;
void on_mouse(int event,int x,int y,int flags,void *ustc)//event滑鼠事件代號，x,y滑鼠坐標，flags拖拽和鍵盤操作的代號
{
static Point pre_pt = cv::Point(-1,-1);//初始坐標
static Point cur_pt = cv::Point(-1,-1);//實時坐標
char temp[16];
if (event == CV_EVENT_LBUTTONDOWN)//左鍵按下，讀取初始坐標，并在影像上該點處劃圓
{
org.copyTo(img);//將原始圖片復制到img中
sprintf(temp,"(%d,%d)",x,y);
pre_pt = Point(x,y);
putText(img,temp,pre_pt,FONT_HERSHEY_SIMPLEX,0.5,Scalar(0,0,0,255),1,8);//在視窗上顯示坐標
circle(img,pre_pt,2,Scalar(255,0,0,0),CV_FILLED,CV_AA,0);//劃圓
imshow("img",img);
}
else if (event == CV_EVENT_MOUSEMOVE && !(flags & CV_EVENT_FLAG_LBUTTON))//左鍵沒有按下的情況下滑鼠移動的處理函式
{
img.copyTo(tmp);//將img復制到臨時影像tmp上，用于顯示實時坐標
sprintf(temp,"(%d,%d)",x,y);
cur_pt = Point(x,y);
putText(tmp,temp,cur_pt,FONT_HERSHEY_SIMPLEX,0.5,Scalar(0,0,0,255));//只是實時顯示滑鼠移動的坐標
imshow("img",tmp);
}
else if (event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON))//左鍵按下時，滑鼠移動，則在影像上劃矩形
{
img.copyTo(tmp);
sprintf(temp,"(%d,%d)",x,y);
cur_pt = Point(x,y);
putText(tmp,temp,cur_pt,FONT_HERSHEY_SIMPLEX,0.5,Scalar(0,0,0,255));
rectangle(tmp,pre_pt,cur_pt,Scalar(0,255,0,0),1,8,0);//在臨時影像上實時顯示滑鼠拖動時形成的矩形
imshow("img",tmp);
}
else if (event == CV_EVENT_LBUTTONUP)//左鍵松開，將在影像上劃矩形
{
org.copyTo(img);
sprintf(temp,"(%d,%d)",x,y);
cur_pt = Point(x,y);
putText(img,temp,cur_pt,FONT_HERSHEY_SIMPLEX,0.5,Scalar(0,0,0,255));
circle(img,pre_pt,2,Scalar(255,0,0,0),CV_FILLED,CV_AA,0);
rectangle(img,pre_pt,cur_pt,Scalar(0,255,0,0),1,8,0);//根據初始點和結束點，將矩形畫到img上
imshow("img",img);
img.copyTo(tmp);
//截取矩形包圍的影像，并保存到dst中
int width = abs(pre_pt.x - cur_pt.x);
int height = abs(pre_pt.y - cur_pt.y);
if (width == 0 || height == 0)
{
printf("width == 0 || height == 0");
return;
}
dst = org(Rect(min(cur_pt.x,pre_pt.x),min(cur_pt.y,pre_pt.y),width,height));
cv::resize(dst,dst,Size(28,28));
cvtColor( dst, dst, CV_BGR2GRAY );
threshold(dst, dst, 170, 255, CV_THRESH_BINARY);
imwrite("/media/sda/Ubuntu 14.0/myMNIST/MNIST_recognize/temp3.png",dst);//注意將這里改為自己的處理結果存盤地址
namedWindow("dst");
imshow("dst",dst);
waitKey(0);
}
}
int main()
{
org = imread("/media/sda/Ubuntu 14.0/myMNIST/MNIST_recognize/num3.jpg");//讀取圖片地址
org.copyTo(img);
org.copyTo(tmp);
namedWindow("img");//定義一個img視窗
setMouseCallback("img",on_mouse,0);//呼叫回呼函式
imshow("img",img);
cv::waitKey(0);
}
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標籤：基礎類