方法一:用copyTo函数
#include <iostream>
#include <ctime>
#include <vector>
#include <opencv2/opencv.hpp>
using namespace std;
using namespace cv;
int main() {
int windown_height = 260;
int windown_width = 180;
Mat img = imread("E:/code/box/result/a.jpg");
Mat box = imread("E:/code/box/base_box/1.jpg");
cvtColor(img, img, CV_BGR2GRAY);
Mat Board(windown_height, windown_width, CV_8UC1, Scalar(255));
//取出img的一部分
Mat rect=img(Rect(1,windown_height - box.rows - 1, 127 - 1+box.cols, box.rows));
Mat strip = rect.clone();
//在Board上设置ROI
Rect BoardROI1 = Rect(1, windown_height - box.rows - 1, 127 - 1 + box.cols, box.rows);
//把Borad的ROI替换img取出的那部分
strip.copyTo(Board(BoardROI1));
imshow("show", Board);
waitKey(0);
return 0;
}
rect(x,y,width,height)四个参数:
int x; /* 方形的左上角的x-座标 /
int y; / 方形的左上角的y-座标*/
int width; /* 宽 /
int height; / 高 */
resize(输入图像,输出图像,Size(re_x,re_y))
方法二:用addWeighted函数
#include <iostream>
#include <ctime>
#include <vector>
#include <opencv2/opencv.hpp>
using namespace std;
using namespace cv;
int main() {
int windown_height = 260;
int windown_width = 180;
Mat img = imread("E:/code/box/result/a.jpg");
Mat box = imread("E:/code/box/base_box/1.jpg");
cvtColor(img, img, CV_BGR2GRAY);
Mat Board(windown_height, windown_width, CV_8UC1, Scalar(255));
//从img剪切一块(内存共享)
Mat rect=img(Rect(1,windown_height - box.rows - 1, 127 - 1+box.cols, box.rows));
//从Board剪切一块
Mat BoardROI = Board(Rect(1, windown_height - box.rows - 1, 127 - 1 + box.cols, box.rows));
//参数:输入图片1,图片1加权,输入图片2,图片2加权,偏移,输出图像
addWeighted(rect, 1, BoardROI, 0, 0., BoardROI);
imshow("show", Board);
waitKey(0);
return 0;
}