如何在保存前使用 PIL 调整新上传的图像的大小? [英] How to resize the new uploaded images using PIL before saving?

问题描述

我想以 800 像素的高度和宽度调整新图像的大小并保存它们.并且该应用程序不得存储真实图像.有什么帮助吗?

I want to resize the new images in a height and width of 800px and save them. And the app mustn't store the real image. Any help?

这是我的代码，它保存原始图像而不是调整大小的照片:

This is my code, it saves the original image and don't the resized photo:

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)

推荐答案

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

调整大小是非破坏性的，它返回一个新图像.

resize is non-destructive, it returns a new image.

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