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Python | OpenCV program for reading and saving image

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Moving on to image processing, OpenCV allows us to perform multiple operations on an image, but for that we need to read the image file as input, then we can perform the desired operation and save it.

Let’s see a simple operation. to read the image file using the OpenCV library and then save it.

Functions used:

-" imread (Location_of_image, integer): The second parameter is an integer for changing the color of image. -1 To read image Unchanged and 0 To read image in gray scale.

-" imwrite (Name_after_save, variable_containing_read_image)

-" waitKey (0): After execution will keep the window open till a key is pressed

-" destroyAllWindow (): It will close all the windows that were opened during the program run.

Below is the Python implementation:

# Python program to read and save the image

import numpy as np

import cv2

 
# This will give an error if you don’t have a cv2 module

img = cv2.imread ( "G: demo.jpg" , - 1 )

 
# img is a cv2 object and stores the image read demo.jpg

cv2.imwrite ( "outputimage.jpg" , img)

 
# Image is saved in the folder where the program is stored

cv2.waitKey ( 0 )

 
cv2.destroyAllWindow ()

Login:

Output:

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