How to Rotate an Image in OpenCV Python

You can rotate an image in OpenCV Python by following the given steps. I highly recommend you get the “Computer Vision: Models, Learning, and Inference Book” to learn Computer Vision.

Step 1

Open the Spyder IDE (integrated development environment).

Step 2

Import the OpenCV library. If OpenCV is not installed in your system then first install it using This Method.

import cv2 
#cv2 is used for OpenCV library

Step 3

Now read the image from the location. In my case “F:\\AiHints” is the location and “top30.jpg” is the name of the image. Change it according to your image location and name.

image = cv2.imread("F:\\AiHints\\top30.jpg")
#imread is use to read an image from a location

Step 4 (Rotate 90 degrees clockwise)

From this step, You can rotate the image 90 degrees clockwise. (90 degrees clockwise = 270 degrees counter-clockwise). In my case “F:\\AiHints” is the location. Change it according to your location where you want to save the image.

image = cv2.rotate(image, cv2.ROTATE_90_CLOCKWISE)
cv2.imwrite('F:\\AiHints\\Rotate90Clockwise.jpg',image)

cv2.waitKey()
#waitKey() open the image for a specific time in milliseconds until you press any key. 
cv2.destroyAllWindows()
#"destroyAllWindows()" will destroy all the windows that we created.

Step 5 (Rotate 90 degrees CounterClockwise)

From this step, You can rotate the image 90 degrees CounterClockwise. (90 degrees counter-clockwise = 270 degrees clockwise)

image = cv2.rotate(image, cv2.ROTATE_90_COUNTERCLOCKWISE)
cv2.imwrite('F:\\AiHints\\Rotate90CounterClockwise.jpg',image)

cv2.waitKey()
cv2.destroyAllWindows()

Step 6 (Rotate 180 degrees)

From this step, You can rotate the image 180 degrees. (180 degrees clockwise = 180 degrees counter-clockwise)

image = cv2.rotate(image, cv2.ROTATE_180)
cv2.imwrite('F:\\AiHints\\Rotate180.jpg',image)

cv2.waitKey()
cv2.destroyAllWindows()