5.2.2 线性混合操作

版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。

本文链接： https://blog.csdn.net/u013195275/article/details/79866672

    public static void main(String[] args) {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);//加载opencv c++动态库
     combine();
    }

    private static void combine() {
        Mat mat =Mat.zeros(600,600, CvType.CV_8UC3);
         Mat logo = Imgcodecs.imread("d:/11.jpg",Imgcodecs.IMREAD_COLOR);
         Mat mask = Imgcodecs.imread("d:/11.jpg",Imgcodecs.IMREAD_GRAYSCALE);
        Imgproc.ellipse(mat, new Point(300, 300), new Size(600 / 4, 600 / 16), 90, 0, 360, new Scalar(255, 129, 0), 2,
                8, 0);
        Imgproc.ellipse(mat, new Point(300, 300), new Size(600 / 4, 600 / 16), 0, 0, 360, new Scalar(255, 129, 0), 2,
                8, 0);
        Imgproc.ellipse(mat, new Point(300, 300), new Size(600 / 4, 600 / 16), 45, 0, 360, new Scalar(255, 129, 0), 2,
                8, 0);
        Imgproc.ellipse(mat, new Point(300, 300), new Size(600 / 4, 600 / 16), -45, 0, 360, new Scalar(255, 129, 0), 2,
                8, 0);
        Mat roi= mat.submat(new Rect(150, 150, logo.cols(), logo.rows()));
        logo.copyTo(roi, mask);
        Imgcodecs.imwrite("d:/ellipse.jpg", mat);
        Imgcodecs.imwrite("d:/roi.jpg", roi);
        Mat temp=new Mat();
        Imgproc.cvtColor(roi, temp, Imgproc.COLOR_BGR2GRAY);//灰度
    }