Python OpenCV | cv2.rectangle() method (original) (raw)
Last Updated : 12 Aug, 2024
**OpenCV-Python
is a library of Python bindings designed to solve computer vision problems.
cv2.rectangle()
method is used to draw a rectangle on any image.
**Syntax: cv2.rectangle(image, start_point, end_point, color, thickness) **Parameters:image: It is the image on which rectangle is to be drawn. **start_point: It is the starting coordinates of rectangle. The coordinates are represented as tuples of two values i.e. (**X coordinate value, **Y coordinate value). **end_point: It is the ending coordinates of rectangle. The coordinates are represented as tuples of two values i.e. (**X coordinate value, **Y coordinate value). **color: It is the color of border line of rectangle to be drawn. For **BGR, we pass a tuple. eg: (255, 0, 0) for blue color. **thickness: It is the thickness of the rectangle border line in **px. Thickness of **-1 px will fill the rectangle shape by the specified color. **Return Value: It returns an image.
**Image used for all the below examples:
**Example #1:
Python3 1== `
Python program to explain cv2.rectangle() 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'
Start coordinate, here (5, 5)
represents the top left corner of rectangle
start_point = (5, 5)
Ending coordinate, here (220, 220)
represents the bottom right corner of rectangle
end_point = (220, 220)
Blue color in BGR
color = (255, 0, 0)
Line thickness of 2 px
thickness = 2
Using cv2.rectangle() method
Draw a rectangle with blue line borders of thickness of 2 px
image = cv2.rectangle(image, start_point, end_point, color, thickness)
Displaying the image
cv2.imshow(window_name, image)
`
**Output:
**Example #2:
Using thickness of -1 px to fill the rectangle by black color.
Python3 1== `
Python program to explain cv2.rectangle() method
importing cv2
import cv2
path
path = r'C:\Users\Rajnish\Desktop\geeksforgeeks\geeks.png'
Reading an image in grayscale mode
image = cv2.imread(path, 0)
Window name in which image is displayed
window_name = 'Image'
Start coordinate, here (100, 50)
represents the top left corner of rectangle
start_point = (100, 50)
Ending coordinate, here (125, 80)
represents the bottom right corner of rectangle
end_point = (125, 80)
Black color in BGR
color = (0, 0, 0)
Line thickness of -1 px
Thickness of -1 will fill the entire shape
thickness = -1
Using cv2.rectangle() method
Draw a rectangle of black color of thickness -1 px
image = cv2.rectangle(image, start_point, end_point, color, thickness)
Displaying the image
cv2.imshow(window_name, image)
`
**Output:
