如何在保存前使用PIL调整新上传的图像大小？

Question

我想以800px的高度和宽度调整新图像的大小并保存它们.应用程序不得存储真实图像.有帮助吗？

这是我的代码,它保存原始图像,而不是调整大小的照片:

models.py:

class Photo(models.Model):        
    photo = models.ImageField(upload_to='photos/default/')


    def save(self):

        if not self.id and not self.photo:
            return            

        super(Photo, self).save()

        image = Image.open(self.photo)
        (width, height) = image.size

        "Max width and height 800"        
        if (800 / width < 800 / height):
            factor = 800 / height
        else:
            factor = 800 / width

        size = ( width / factor, height / factor)
        image.resize(size, Image.ANTIALIAS)
        image.save(self.photo.path)

Answer 1

image = image.resize(size, Image.ANTIALIAS)

调整大小是非破坏性的,它会返回一个新图像.

Answer 2

我为我的项目使用django-resized.