保存前如何使用PIL调整新上传的图像大小？ [英] How to resize the new uploaded images using PIL before saving?

问题描述

我想调整高度和宽度为800像素的新图像大小并保存。而应用程序不能存储真实图像。任何帮助？

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，不要调整大小的照片：

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

models.py：

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)

resize是非破坏性的，它返回一个新的图像。

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

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