Django Change Image Format and Quality - django

Question

Django project
Im trying to compress uploaded images and change their format
Currently it only compresses png images but when a jpg image is uploaded it does not change the format nor does it compress the image
please help sir
models.py
import sys
from PIL import Image
from io import BytesIO
from django.db import models
from django.contrib.auth.models import User
from django.core.files.uploadedfile import InMemoryUploadedFile
from django.core.exceptions import ValidationError
class UserProfile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
image = models.ImageField(upload_to='images/userpfp/', blank=True)
def __str__(self):
return self.user.username
def compressImageMain(self,image):
if self.image:
def save(self, *args, **kwargs):
if not self.id:
self.image = self.compressImage(self.image)
super(UserProfile, self).save(*args, **kwargs)
def compressImage(self,image):
imageTemproary = Image.open(image)
outputIoStream = BytesIO()
basewidth = 520
wpercent = (basewidth/float(imageTemproary.size[0]))
hsize = int((float(imageTemproary.size[1])*float(wpercent)))
imageTemproaryResized = imageTemproary.resize( (basewidth,hsize) )
imageTemproaryResized.save(outputIoStream , format='PNG', quality=50)
outputIoStream.seek(0)
image = InMemoryUploadedFile(outputIoStream,'ImageField', "%s.png" % image.name.split('.')[0], 'images/userpfp/png', sys.getsizeof(outputIoStream), None)
return image
else:
pass

Answer 1

I found the sollution
first I needed to add: .convert("RGB") when I opened the image
See: this post
img = Image.open(image).convert("RGB")
To maintain image quality over png and jpef image uploads:
See: this post
I compressed png to png and saved it as png
and compressed jpeg to jpeg and saved it as jpeg
(jpg and jpeg are the same)
import sys
from PIL import Image
from io import BytesIO
from django.core.files import File
from django import forms
from django.db import models
class Trade(models.Model):
image = models.ImageField(upload_to='images/trades/')
user = models.ForeignKey(User, on_delete=models.CASCADE)
def __str__(self):
return self.user.username
def save(self):
if not self.id:
self.image = self.compressImage(self.image)
super(Trade, self).save()
def compressImage(self,image):
img = Image.open(image).convert("RGB")
im_io = BytesIO()
if image.name.split('.')[1] == 'jpeg' or image.name.split('.')[1] == 'jpg':
img.save(im_io , format='jpeg', optimize=True, quality=55)
new_image = File(im_io, name="%s.jpeg" %image.name.split('.')[0],)
else:
img.save(im_io , format='png', optimize=True, quality=55)
new_image = File(im_io, name="%s.png" %image.name.split('.')[0],)
return new_image