Support
Please support this website. Visit the Amazon using this affiliate link. There won't be any difference in your purchage, we will get some commission for every purchase you make.
Advertise with us
image   2   24408
How to compress the uploaded image before storing it in Django


We already know how to upload the image file in Django, store it and use it in Django templates. Sometimes images are of large size and we want to compress them to save some space and to reduce the page load time where those images are being used. In this article, we will see how to compress and image before storing it.


Getting file in view

from blog.models import ImageModel

def upload_image(request):
data = dict()
if "GET" == request.method:
return render(request, 'blog/upload_image.html', data)

# process POST request
files = request.FILES # multivalued dict
image = files.get("image")          # compress the image here and then save it
instance = ImageModel()
instance.image = image
instance.save()
return render(request, 'blog/upload_image.html', data)



Installing dependencies

We strongly recommend using a virtual environment to run your Django application. Once the virtual environment is active, install the pillow python package in it.

pip install pillow

I am using version 5.2.0.



Compressing image

First import the dependencies then open the image and then save it back with the desired quality level.

from io import BytesIO
from PIL import Image
from django.core.files.uploadedfile import InMemoryUploadedFile

i = Image.open(image)
thumb_io = BytesIO()
i.save(thumb_io, format='JPEG', quality=80)
inmemory_uploaded_file = InMemoryUploadedFile(thumb_io, None, 'foo.jpeg',
'image/jpeg', thumb_io.tell(), None)


In the last line, we are converting the processed image back to the InMemoryUploadedFile type image. Read more about the InMemoryUploadedFile class and its parameters here.

Now save this compressed image to model. Complete view code will look like below.

from blog.models import ImageModel
from io import BytesIO
from PIL import Image
from django.core.files.uploadedfile import InMemoryUploadedFile


def upload_image(request):
data = dict()
if "GET" == request.method:
return render(request, 'blog/upload_image.html', data)

# process POST request
files = request.FILES # multivalued dict
image = files.get("image")          # compress the image here and then save it     i = Image.open(image) thumb_io = BytesIO() i.save(thumb_io, format='JPEG', quality=80) inmemory_uploaded_file = InMemoryUploadedFile(thumb_io, None, 'foo.jpeg', 'image/jpeg', thumb_io.tell(), None)
instance = ImageModel()
instance.image = inmemory_uploaded_file
instance.save()
return render(request, 'blog/upload_image.html', data)



Possible errors

If you are getting an error something like "cannot write mode RGBA as JPEG", then convert the image to RGB before trying to compress it.

i = Image.open(image)
i = i.convert('RGB')
thumb_io = BytesIO()
i.save(thumb_io, format='JPEG', quality=80)


More about this error can be found in this GitHub ticket link.


Once the image is uploaded and saved on the server, compare the sizes. You will find up to a 30% reduction in size.



Host your Django Application for free on PythonAnyWhere. If you want full control of your application and server, you should consider DigitalOcean. Create an account with this link and get $100 credits.


image   2   24408
2 comments on 'How To Compress The Uploaded Image Before Storing It In Django'
Login to comment

Martin March 19, 2020, 7:55 a.m.
I was having troubles resizing an image and uploading to s3. I'm so glad i stumbled on your blog post. Thank a lot
Vishal Jain Aug. 24, 2020, 2:24 p.m.
Thats awesome Blog, lot of thanks.

Related Articles:
How to validate an uploaded image in Python Django
Validating image before storing it in database or on file storage. Checking the size of uploaded image in python django. Checking the extension of uploaded image in python django. Checking the content size of uploaded image. Checking the mime-type of uploaded Image. Validating a malicious image before saving it. Using python-magic package...
Text to QR code image and QR code image to text generator in Python Django
QR code image to text generator in Python Django, Text to QR code image generator in Python Django, Implementing QR code generator in Python Django. Serving static files in Django media...
Python Script 17: Setting bing image of the day as desktop wallpaper
Python Script to Set bing image of the day as desktop wallpaper, Automating the desktop wallpaper change to bing image of day using python code, changing desktop wallpaper using python, downloading an image using python code, updating the desktop wallpaper daily using python...
Python Script 16: Generating word cloud image of a text using python
word cloud python, generating a word cloud of a text using python code, python code to generate a word cloud image of a text. Using word frequencies to generate a word cloud image using a python script...
DigitalOcean Referral Badge

© 2022-2023 Python Circle   Contact   Sponsor   Archive   Sitemap