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Image compression and conversion to JPG format before uploading the file

Author:
monikkinom
Posted:
January 26, 2015
Language:
Python
Version:
Not specified
Tags:
django image upload imagefield compression
Score:
3 (after 3 ratings)

I've reimplemented the code I found somewhere on the web within my models file. The earlier version was incapable of converting all formats to JPG while this code converts all formats and compresses all of them successfully.

You need to have PILLOW installed for this to work.

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from PIL import Image as Img
import StringIO

class Images(models.Model):
    image = models.ImageField()

    def save(self, *args, **kwargs):
        if self.image:
            img = Img.open(StringIO.StringIO(self.image.read()))
            if img.mode != 'RGB':
                img = img.convert('RGB')
            img.thumbnail((self.image.width/1.5,self.image.height/1.5), Img.ANTIALIAS)
            output = StringIO.StringIO()
            img.save(output, format='JPEG', quality=70)
            output.seek(0)
            self.image= InMemoryUploadedFile(output,'ImageField', "%s.jpg" %self.image.name.split('.')[0], 'image/jpeg', output.len, None)
        super(Images, self).save(*args, **kwargs)

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Comments

Alphare (on December 1, 2015):

This is very good! Copy and paste, it just works.

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