image_resizing___keep_proportion___add_transparent_background.py

# Taken from: https://stackoverflow.com/a/52969463/5600965


from PIL import Image


def pad_image(original_image, **kwargs):
    width, height = 200, 64
    ratio_width = width / original_image.width
    ratio_height = height / original_image.height
    if ratio_width <= ratio_height:
        # It must be fixed by width
        resize_width = width
        resize_height = round(ratio_width * original_image.height)
    else:
        # Fixed by height
        resize_width = round(ratio_height * original_image.width)
        resize_height = height
    image_resize = original_image.resize((resize_width, resize_height), Image.ANTIALIAS)
    background = Image.new('RGBA', (width, height), (0, 0, 0, 0))
    offset = (round((width - resize_width) / 2), round((height - resize_height) / 2))
    background.paste(image_resize, offset)
    return background