rt， 本程序用调用了opencv裁剪图片， 其实本质上就是鼠标操作。

#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/opencv.hpp"
#include <iostream>
#include <string>
using namespace cv;
using namespace std;

// global variable
static Mat g_img_src;
static Mat g_img_src_res;
static Mat g_img_dst;
static Mat g_img_sub;


static bool g_is_rect_inited = false;
static Point g_rect_tl;
static string g_window_name = "image";

static int imagenum = 13;

string sourcefolder = "sele" ;
string resfolder = "re";

static void onMouse( int event, int x, int y, int, void* )
{

	if(CV_EVENT_LBUTTONDOWN == event){
		g_is_rect_inited = true;
		g_rect_tl = Point(x, y);    
	}
	else if (CV_EVENT_MOUSEMOVE == event && g_is_rect_inited){      
		g_img_src.copyTo(g_img_dst);
		rectangle(g_img_dst, g_rect_