6 Ways to Save image to file in Python

In this Python tutorial, we will learn how to save an image to file in python.

Saving an image to a file in Python can be done using various methods. Here are some of the most common ways to save an image in Python:

• Using the OpenCV library
• Using the PIL library
• Using the URLLIB library
• Using the matplotlib library
• Using the pickle module
• Using the skimage library

How to Python save an image to file

Let us see in detail the above 6 ways to save an image to a file in Python.

Method-1: Python save an image to file using OpenCV library

OpenCV is a popular computer vision library that provides a function cv2.imwrite() to save an image to a file in Python.

# Import the necessary libraries
import cv2 
import os 

# Set the file path for the source image
path = r'C:\Users\Administrator.SHAREPOINTSKY\Downloads\dora.jpg'

# Set the directory for saving the image
directory = r'C:\Users\Administrator.SHAREPOINTSKY\Desktop\Work'

# Load the image using OpenCV
img = cv2.imread(path) 

# Change the working directory to the specified directory for saving the image
os.chdir(directory) 

# Print the list of files in the directory before saving the image
print("Before saving")   
print(os.listdir(directory))   

# Save the image with the filename "cat.jpg"
filename = 'cat.jpg'
cv2.imwrite(filename, img) 

# Print the list of files in the directory after saving the image
print("After saving")  
print(os.listdir(directory))

The above code uses the OpenCV and OS libraries in Python to perform the following tasks:

• Imports the required libraries: cv2 and os.
• Sets the file path for the source image to path, which is a string representing the file location on the local system.
• Sets the directory for saving the image to directory, which is a string representing the directory location on the local system.
• Loads the image using the cv2.imread() function and stores it in the variable img.
• Changes the current working directory to the specified directory for saving the image using the os.chdir() function.
• Prints the list of files in the directory before saving the image using the os.listdir() function and print() statement.
• Saves the image to the specified directory with the filename cat.jpg using the cv2.imwrite() function.
• Prints the list of files in the directory after saving the image using the os.listdir() function and print() statement.

Here, we can the list of directories before and after saving as the output. You can refer to the below screenshot for the output.

Read: Python read a binary file

Method-2: Python save an image to file using the PIL library

PIL (Python Imaging Library) is another popular library for image manipulation in Python. It provides a method Image.save() to save an image to a file.

# Import the Image module from the PIL library
from PIL import Image  
import PIL  

# Open the image with the specified file path
picture = Image.open(r'Downloads\3.jpg')  

# Save the image with the specified file name
picture = picture.save("dolls.jpg")

The above code uses the Python Imaging Library (PIL) to perform the following tasks:

• Imports the Image module from the PIL library using the from PIL import Image statement.
• Imports the PIL library using the import PIL statement.
• Opens an image with the specified file path using the Image.open() function and stores it in the picture variable.
• Saves the image with the specified filename dolls.jpg using the .save() method. The .save() method is a method of the Image class and is used to save the image to disk. The method updates the picture variable with the saved image.

Read: Python write a list to CSV

Method-3: Python save an image to file using the matplotlib library

Matplotlib is a plotting library in Python that provides a function savefig() to save a figure to a file. To save an image, you can first plot it using Matplotlib and then save it using the savefig() function.

# Import the matplotlib.pyplot library as plt
import matplotlib.pyplot as plt

# Read the image file
img = plt.imread("https://i0.wp.com/pythonguides.com/content/simon-berger.jpg")

# Display the image
plt.imshow(img)

# Save the image
plt.savefig("saved_image.jpg")

The above code uses the matplotlib library to perform the following tasks:

• Imports the Matplotlib’s Pyplot module using the import matplotlib.pyplot as plt statement.
• Reads the image file with the specified file path using the plt.imread() function and stores it in the img variable.
• Displays the image using the plt.imshow() function.
• Saves the image to disk with the specified file name saved_image.jpg using the plt.savefig() function.

Read: Python Count Words in File

Method-4: Python save an image to file using the URLLIB library

Another way to save an image to a file in Python is by using the urllib library. The urllib library provides a function urlretrieve() that can be used to download an image from a URL and save it to a file.

# Import the urllib and PIL libraries
import urllib.request
from PIL import Image  
import PIL

# Retrieve the image from the specified URL and print the result
print(urllib.request.urlretrieve("https://bit.ly/3oAeohK"))

# Open the image with the specified file name
image = PIL.Image.open("new.png")

# Show the image
image.show()

The above code uses the urllib and Python Imaging Library (PIL) to perform the following tasks:

1. Imports the urllib and PIL libraries using the import urllib.request and from PIL import Image statements.
2. Retrieves the image from the specified URL using the urllib.request.urlretrieve() function and stores the result in the new.png file.
3. Opens the image with the specified file name new.png using the PIL.Image.open() function and stores it in the image variable.
4. Displays the image using the image.show() function.

The URL is saved in the image format as the output in the below screenshot.

Read: PdfFileMerger Python examples

Method-5: Python save an image to file using the pickle module

The pickle module in Python can also be used to save an image to a file. Pickle is a module that allows you to serialize and deserialize Python objects, including images.

# Import the pickle and matplotlib.pyplot modules
import pickle
import matplotlib.pyplot as plt

# Read the image file with the specified file path
img = plt.imread("https://i0.wp.com/pythonguides.com/content/saved_image.jpg")

# Open the file with write binary mode to store the image using pickle
with open("saved_image.pickle", "wb") as f:
    # Dump the image data into the file using pickle
    pickle.dump(img, f)

The above code performs the following tasks:

• Imports the pickle and matplotlib.pyplot modules.
• Reads an image file with the specified file path /content/saved_image.jpg using the plt.imread() function and stores the image data in the img variable.
• Opens a file with the specified name saved_image.pickle in write binary mode using the with open(“saved_image.pickle”, “wb”) as f: statement.
• Dumps the image data stored in the img variable into the opened file using the pickle.dump(img, f) statement. This process serializes the image data into binary form and writes it to the file, allowing it to be stored and retrieved later.

Read: Python File methods

Method-6: Python save an image to file using the skimage library

Scikit-image is a library for image processing in Python that provides a function imsave() to save an image to a file.

# Import the imsave and imread functions from the skimage.io module
from skimage.io import imsave, imread

# Read the image file with the specified file path
img = imread("https://i0.wp.com/pythonguides.com/content/simon-berger.jpg")

# Save the image to disk with the specified file name
imsave("saved_image.jpg", img)

The above code uses the skimage library to perform the following tasks:

1. Imports the imsave and imread functions from the skimage.io module using the from skimage.io import imsave, imread statement.
2. Reads the image file with the specified file path /content/simon-berger.jpg using the imread() function and stores it in the img variable.
3. Saves the image to disk with the specified file name saved_image.jpg using the imsave() function. The img variable is passed as the image data to be saved.

You may also like to read the following Python tutorials.

• How to get filename from a path in Python
• Python Read CSV File and Write CSV File
• Create and modify PDF file in Python
• How to rename a file in Python [4 methods]

In this tutorial, we have learned about how to save an image to file in python, and also we have covered these methods:

• Using the OpenCV library
• Using the PIL library
• Using the URLLIB
• Using the matplotlib library
• Using the pickle
• Using the skimage library