thumb.py

from __future__ import print_function
from PIL import Image, ExifTags



def square_thumb(img, thumb_size):
    THUMB_SIZE = (thumb_size,thumb_size)
    exif=dict((ExifTags.TAGS[k], v) for k, v in img._getexif().items() if k in ExifTags.TAGS)
    if   exif['Orientation'] == 3 :
        img=img.rotate(180, expand=True)
    elif exif['Orientation'] == 6 :
        img=img.rotate(270, expand=True)
    elif exif['Orientation'] == 8 :
        img=img.rotate(90, expand=True)


    width, height = img.size

    # square it

    if width > height:
        delta = width - height
        left = int(delta/2)
        upper = 0
        right = height + left
        lower = height
    else:
        delta = height - width
        left = 0
        upper = int(delta/2)
        right = width
        lower = width + upper

        img = img.crop((left, upper, right, lower))
        img.thumbnail(THUMB_SIZE, Image.ANTIALIAS)

    return img