06 cvSetMouseCallback 滑鼠動作

目的:

cvSetMouseCallback 滑鼠動作

函數介紹:

cvInRangeS 找出特定的顏色,找到的話,就顯示為白色,不然為黑色。

參數值:

cvSetMouseCallback("image", mymouse);
void mymouse(int event, int x, int y, int flag, void* param)

使用範例:

sample13_Mouse_滑鼠動作
[code]
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/opencv.hpp>
#include <iostream>
#include <string.h>
#include <fstream>
using namespace cv;

IplImage * image;

void mymouse(int event, int x, int y, int flag, void* param)
{

static int mousedown=0;

if(event==CV_EVENT_LBUTTONDOWN){
cvCircle(image, cvPoint(x,y), 8,cvScalar(0,0,255));
mousedown=1;
}
if(event==CV_EVENT_MOUSEMOVE && mousedown==1){
cvCircle(image, cvPoint(x,y), 2,cvScalar(0,255,0));
}
if(event==CV_EVENT_LBUTTONUP){
cvCircle(image, cvPoint(x,y), 8,cvScalar(255,0,0));
mousedown=0;
}
cvShowImage("image", image);
}

int main(int argc,char **argv)
{
int width,height;
if(argc<=1)
{
std::cout<<"Error:Please Load a picture!"<<std::endl;
return 0;
}
//建立視窗
namedWindow("image",CV_WINDOW_AUTOSIZE);
//讀取圖片
image=cvLoadImage(argv[1]);
width=image->width;
height=image->height;

cvShowImage("image", image);
cvSetMouseCallback("image", mymouse);
waitKey(0);
cvDestroyAllWindows();
return 0;
}

[/code]

結果:

Screen Shot 2015-03-01 at 1.26.11 PM

補充資料:

OpenCV
CH01 簡介CH02 OpenCV APICH03 繪圖CH04 應用範例CH06 haarcascadesCH06 surf和siftCH07 OCRCH09 FaceCH5 輪廓(findContours、drawContours)