transforms Module

class simpleimages.transforms.BasePILTransform

Bases: object

Base transform object that provides helper methods to transform django.core.files.images.ImageFile using PIL.

Must subclass and override transform_pil_image().

__call__(original_django_file)

Returns the transformed version of PIL.Image.Image

Uses transform_pil_image() to transform the PIL.Image.Image.

Parameters:original_django_file (django.core.files.images.ImageFile) – source file Returns:transformed file Return type:django.core.files.File

django_file_to_pil_image(django_file)

Converts a the file returned by django.db.models.fields.ImageField to a PIL image.

Parameters:django_file (django.db.models.fields.files.FieldFile) – django file Return type:PIL.Image.Image

pil_image_to_django_file(pil_image)

Gets a PIL image ready to be able to be saved using django.db.models.fields.files.FieldFile.save()

It converts the mode first to RGB or L, so that it can then save it as a JPEG. It will save it as a progressive JPEG with a quality of IMAGE_QUALITY.

Parameters:pil_image (PIL.Image.Image) – original image Returns:transformed image Return type:django.core.files.base.ContentFile

transform_pil_image(pil_image)

Returns the transformed version of the PIL.Image.Image Do some logic on PIL.Image.Image.

Must subclass method to provide transformation logic.

Parameters:pil_image (PIL.Image.Image) – original image Returns:transformed image Return type:PIL.Image.Image

class simpleimages.transforms.Scale(width=None, height=None)

Bases: simpleimages.transforms.BasePILTransform

Scales down an image to max height and/or width. If the original image is smaller than both/either specified dimensions than it will be left unchanged.

__init__(width=None, height=None)

Initialize this class with a max height and/or width (in pixels).

Parameters:

• height (int or float) – max height of scaled image
• width (int or float) – max width of scaled image

transform_pil_image(pil_image)

Uses PIL.Image.Image.transform() to scale down the image.

Based on this stackoverflow discussions, uses PIL.Image.ANTIALIAS