Python OpenCV | cv2.circle() method
OpenCV-Python is a library of Python bindings designed to solve computer vision problems. cv2.circle() method is used to draw a circle on any image.
Syntax: cv2.circle(image, center_coordinates, radius, color, thickness)
Parameters:
image: It is the image on which circle is to be drawn.
center_coordinates: It is the center coordinates of circle. The coordinates are represented as tuples of two values i.e. (X coordinate value, Y coordinate value).
radius: It is the radius of circle.
color: It is the color of border line of circle to be drawn. For BGR, we pass a tuple. eg: (255, 0, 0) for blue color.
thickness: It is the thickness of the circle border line in px. Thickness of -1 px will fill the circle shape by the specified color.
Return Value: It returns an image.
Image used for all the below examples:
Example #1:
# Python program to explain cv2.circle() method # importing cv2import cv2 # pathpath = r'C:\Users\Rajnish\Desktop\geeksforgeeks\geeks.png' # Reading an image in default modeimage = cv2.imread(path) # Window name in which image is displayedwindow_name = 'Image' # Center coordinatescenter_coordinates = (120, 50)# Radius of circleradius = 20 # Blue color in BGRcolor = (255, 0, 0) # Line thickness of 2 pxthickness = 2 # Using cv2.circle() method# Draw a circle with blue line borders of thickness of 2 pximage = cv2.circle(image, center_coordinates, radius, color, thickness) # Displaying the imagecv2.imshow(window_name, image) |
Output:
Example #2:
Using thickness of -1 px to fill the circle by red color.
# Python program to explain cv2.circle() method # importing cv2import cv2 # pathpath = r'C:\Users\Rajnish\Desktop\geeksforgeeks\geeks.png' # Reading an image in default modeimage = cv2.imread(path) # Window name in which image is displayedwindow_name = 'Image' # Center coordinatescenter_coordinates = (120, 100)# Radius of circleradius = 30 # Red color in BGRcolor = (0, 0, 255) # Line thickness of -1 pxthickness = -1 # Using cv2.circle() method# Draw a circle of red color of thickness -1 pximage = cv2.circle(image, center_coordinates, radius, color, thickness) # Displaying the imagecv2.imshow(window_name, image) |
Output:
Last Updated on October 28, 2021 by admin