Draw Marker on Image using OpenCV

OpenCV provides various functions for drawing geometric shapes such as line, rectangle, circle, etc.

The drawMarker function draws marker on an image by predefined x and y coordinates, marker type, size and other parameters.

import cv2
import numpy as np

img = np.zeros((100, 300, 3), dtype=np.uint8)

x, y = 150, 50
color = (0, 255, 0)
markerType = cv2.MARKER_CROSS
markerSize = 15
thickness = 2
cv2.drawMarker(img, (x, y), color, markerType, markerSize, thickness)

cv2.imshow('Image', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

#include <opencv2/opencv.hpp>

using namespace cv;

int main()
{
    Mat img = Mat::zeros(100, 300, CV_8UC3);

    int x = 150, y = 50;
    Scalar color(0, 255, 0);
    int markerType = MARKER_CROSS;
    int markerSize = 15;
    int thickness = 2;
    drawMarker(img, Point(x, y), color, markerType, markerSize, thickness);

    imshow("Image", img);
    waitKey(0);
    destroyAllWindows();

    return 0;
}

package app;

import org.opencv.core.*;
import org.opencv.highgui.HighGui;
import org.opencv.imgproc.Imgproc;

public class Main
{
    static { System.loadLibrary(Core.NATIVE_LIBRARY_NAME); }

    public static void main(String[] args)
    {
        Mat img = Mat.zeros(100, 300, CvType.CV_8UC3);

        int x = 150, y = 50;
        Scalar color = new Scalar(0, 255, 0);
        int markerType = Imgproc.MARKER_CROSS;
        int markerSize = 15;
        int thickness = 2;
        Imgproc.drawMarker(img, new Point(x, y), color, markerType, markerSize, thickness);

        HighGui.imshow("Image", img);
        HighGui.waitKey(0);
        HighGui.destroyAllWindows();

        System.exit(0);
    }
}

Result: