opencv组合图片，上面大图，下面小图

Demo

int main(int argc, char* argv[]){
    //读取大图片
    Mat img1 = imread("c://01//01.jpg");
    //读取小图片
    Mat img2 = imread("c://01//02.jpg");
    Mat combinationImg = Mat::zeros(Size(1028, 961), CV_8UC3);
    Rect ROI(0, 0, 1024, 768);
    Mat temp; 
    resize(img1, temp, Size(ROI.width  , ROI.height ));
    temp.copyTo(combinationImg(ROI));
    for (int num = 0; num < 4 ;num++) {
        Rect ROI2(1 + (256 * num), 769 ,256, 192);
        Mat temp2; resize(img2, temp2, Size(ROI2.width, ROI2.height));
        temp2.copyTo(combinationImg(ROI2));
    }
    string title = "Angelo";
    namedWindow(title, 1);
    imshow(title, combinationImg);
    waitKey();
    return 0;
}

运行结果：

image.png

 public static void main(String[] args) {
        URL url = ClassLoader.getSystemResource("opencv/x64/opencv_java430.dll");
        System.load(url.getPath());
        Mat img1 = imread("C:\\01\\03.jpg", 1);
        Mat img2 = imread("C:\\01\\04.jpg", 1);
        Mat dispImage = Mat.zeros(new Size(1028,980), CvType.CV_8UC3);
        Rect ROI = new Rect(0, 0, 1024, 768);
        Mat temp = new Mat();
        Imgproc.resize(img1, temp, new Size(ROI.width  , ROI.height));
        temp.copyTo(dispImage.submat(ROI));
        for (int num = 0; num < 4 ;num++) {
            Rect ROI2 = new Rect(1 + (256 * num), 778 ,256, 192);
            Mat temp2 = new Mat();
            Imgproc.resize(img2, temp2,new Size(ROI2.width, ROI2.height));
            temp2.copyTo(dispImage.submat(ROI2));
        }
        imshow("Angelo", dispImage);
        waitKey();
      
    }

image.png

需要合理处理xy坐标，以及图片的width和height