4合一图片 opencv linux 车牌证据

#include <opencv2/opencv.hpp>
using namespace std;
 using namespace cv;int main()
 {
     //读入四幅图片
     Mat image_1 = imread("11.jpg");
     Mat image_2 = imread("22.jpg");
     Mat image_3 = imread("33.jpg");
     Mat image_4 = imread("44.jpg");    //归一化为相同的大小：320*240
     Size sz = Size(320, 240);
     resize(image_1, image_1, sz);
     resize(image_2, image_2, sz);
     resize(image_3, image_3, sz);
     resize(image_4, image_4, sz);    //创建连接后存入的图像
     Mat result(sz.height*2+1, sz.width * 2 + 1, image_1.type());    //四幅图像拷贝,中间的一行（列）作为图像间分割线
     //第1幅，拷贝到左上角
     Rect roi_rect = Rect(0, 0, sz.width, sz.height);
     image_1.copyTo(result(roi_rect));    //第2幅，拷贝到右上角
     roi_rect = Rect(sz.width+1, 0, sz.width, sz.height);
     image_2.copyTo(result(roi_rect));    //第3幅，拷贝到左下角
     roi_rect = Rect(0, sz.height+1, sz.width, sz.height);
     image_3.copyTo(result(roi_rect));    //第4幅，拷贝到右下角
     roi_rect = Rect(sz.width+1, sz.height+1, sz.width, sz.height);
     image_4.copyTo(result(roi_rect));    //显示四幅图像连接后的图像
     imshow("result", result);
     waitKey(0);    return 0;
 }