Question

我正在做一个API，它从手机应用程序中获取图像。图像包含EXIF数据，其中一些图像具有方向标记（根据：PIL thumbnail is rotating my image?）。目前我解决了在命令行中使用imagemagick / morgify的问题。但我想知道在DRF视图中接收数据后，是否有可能（或有意义）使用PIL / Pillow进行自动定位。

- 编辑 -

看起来，我必须使用http://www.django-rest-framework.org/api-guide/generic-views/

中的保存和删除挂钩

Answer 1

好的，所以代码是（从PIL thumbnail is rotating my image?复制的自动旋转代码）：

from PIL import Image, ExifTags


def autorotate(path):
    """ This function autorotates a picture """
    image = Image.open(path)
    if hasattr(image, '_getexif'):  # only present in JPEGs
        orientation = None
        for orientation in ExifTags.TAGS.keys():
            if ExifTags.TAGS[orientation] == 'Orientation':
                break
        e = image._getexif()  # returns None if no EXIF data
        if e is not None:
            exif = dict(e.items())
            orientation = exif[orientation]

            if orientation == 3:
                image = image.transpose(Image.ROTATE_180)
            elif orientation == 6:
                image = image.transpose(Image.ROTATE_270)
            elif orientation == 8:
                image = image.transpose(Image.ROTATE_90)
            image.save(path)

class ReceivedDataList(generics.ListCreateAPIView):
    queryset = User.objects.all()
    serializer_class = UserSerializer
    filter_backends = (filters.DjangoFilterBackend,)
    filter_class = UserFilter

    def perform_create(self, serializer):
        instance = serializer.save()
        autorotate(instance.photo.file.name)

Django休息框架 - 用PIL自动旋转图像

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