django - 如何在django python中压缩上传的图像

Question

已经阅读了许多关于如何压缩图像的 python 教程，使用了 PILLOW 但它不起作用。如果我能在我的 django views.py 中获得有关如何使用 PILLOW 进行图像压缩的完整文档，我将不胜感激

Answer 1

我曾在 pillow 中使用 thumbnail() 来压缩之前在 models.py 中的图像 thumbnail() 在调整图像大小时不会改变图像的纵横比。

import sys

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

def compressImage(uploaded_image):
    image_temp = Image.open(uploaded_image)
    outputIoStream = BytesIO()
    image_temp.thumbnail( (1600,1600) )
    image_temp.save(outputIoStream , format='JPEG', quality=100)
    outputIoStream.seek(0)
    uploaded_image = InMemoryUploadedFile(outputIoStream,'ImageField', "%s.jpg" % uploaded_image.name.split('.')[0], 'image/jpeg', sys.getsizeof(outputIoStream), None)
    return uploaded_image

class ABC(models.Model):
    name = models.CharField(max_length=200)
    image = models.ImageField(upload_to=/upload/path/here/, null=True, blank=True)

    def save(self, *args, **kwargs):
        if not self.id:
            self.image = compressImage(self.image)
        super(ABC, self).save(*args, **kwargs)