Python OpenCV | cv2.ellipse() method (original) (raw)
Last Updated : 04 Jan, 2023
OpenCV-Python is a library of Python bindings designed to solve computer vision problems. cv2.ellipse() method is used to draw a ellipse on any image.
Syntax: cv2.ellipse(image, centerCoordinates, axesLength, angle, startAngle, endAngle, color [, thickness[, lineType[, shift]]])Parameters: image: It is the image on which ellipse is to be drawn.centerCoordinates: It is the center coordinates of ellipse. The coordinates are represented as tuples of two values i.e. (X coordinate value, Y coordinate value).axesLength: It contains tuple of two variables containing major and minor axis of ellipse (major axis length, minor axis length).angle: Ellipse rotation angle in degrees.startAngle: Starting angle of the elliptic arc in degrees.endAngle: Ending angle of the elliptic arc in degrees.color: It is the color of border line of shape to be drawn. For BGR, we pass a tuple. eg: (255, 0, 0) for blue color.thickness: It is the thickness of the shape border line in px. Thickness of -1 px will fill the shape by the specified color.lineType: This is an optional parameter.It gives the type of the ellipse boundary.shift: This is an optional parameter. It denotes the number of fractional bits in the coordinates of the center and values of axes.Return Value: It returns an image.
Image used for all the below examples: 
Example #1:
Python3 1== `
Python program to explain cv2.ellipse() method
importing cv2
import cv2
path
path = r'C:\Users\Rajnish\Desktop\geeksforgeeks\geeks.png'
Reading an image in default mode
image = cv2.imread(path)
Window name in which image is displayed
window_name = 'Image'
center_coordinates = (120, 100)
axesLength = (100, 50)
angle = 0
startAngle = 0
endAngle = 360
Red color in BGR
color = (0, 0, 255)
Line thickness of 5 px
thickness = 5
Using cv2.ellipse() method
Draw a ellipse with red line borders of thickness of 5 px
image = cv2.ellipse(image, center_coordinates, axesLength, angle, startAngle, endAngle, color, thickness)
Displaying the image
cv2.imshow(window_name, image)
`
Output: 
**Example #2:**Using thickness of -1 px and rotation of 30 degrees.
Python3 1== `
Python program to explain cv2.ellipse() method
importing cv2
import cv2
path
path = r'C:\Users\Rajnish\Desktop\geeksforgeeks\geeks.png'
Reading an image in default mode
image = cv2.imread(path)
Window name in which image is displayed
window_name = 'Image'
center_coordinates = (120, 100)
axesLength = (100, 50)
angle = 30
startAngle = 0
endAngle = 360
Blue color in BGR
color = (255, 0, 0)
Line thickness of -1 px
thickness = -1
Using cv2.ellipse() method
Draw a ellipse with blue line borders of thickness of -1 px
image = cv2.ellipse(image, center_coordinates, axesLength, angle, startAngle, endAngle, color, thickness)
Displaying the image
cv2.imshow(window_name, image)
`
Output: 