Draw a circle using OpenCV function circle()

In this article, we will draw a circle on an image using the OpenCV function circle().

Original Image

Algorithm

Step 1: Import OpenCV.
Step 2: Define the radius of circle.
Step 3: Define the center coordinates of the circle.
Step 4: Define the color of the circle.
Step 5: Define the thickness.
Step 6: Pass the above arguments into cv2.circle() along with the image.
Step 7: Display the output.

Example Code

import cv2
image = cv2.imread('testimage.jpg')
radius = 100
center = (350, 175)
color = (255,255,0)
thickness = 15
image = cv2.circle(image, center, radius, color, thickness)
cv2.imshow('Circle', image)

Output