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Image compression and conversion to JPG format before uploading the file

Author:
monikkinom
Posted:
January 26, 2015
Language:
Python
Version:
1.7
Tags:
django image upload imagefield compression
Score:
0 (after 0 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.

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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', "file.jpg", 'image/jpeg', output.len, None)
        super(Images, self).save(*args, **kwargs)

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