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__author__ = "Mark Allan B. Meriales" | |
# based from http://www.pythoncentral.io/watermark-images-python-2x/ | |
# mine uses a picture as a watermark | |
from PIL import Image, ImageEnhance | |
def add_watermark(image_file, logo_file, opacity=1): | |
img = Image.open(image_file).convert('RGB') | |
logo = Image.open(logo_file) | |
# TODO: add aspect ratio as an argument | |
base_w = (img.size[0]/9) / float(logo.size[0]) | |
base_h = (img.size[0]/12) / float(logo.size[1]) | |
logo_w = int(float(logo.size[0]) * float(base_h)) | |
logo_h = int(float(logo.size[1]) * float(base_w)) | |
logo = logo.resize((logo_w, logo_h), Image.ANTIALIAS) | |
# position the watermark | |
offset_x = (img.size[0] - logo.size[0]) - 10 | |
offset_y = (img.size[1] - logo.size[1]) - 10 | |
watermark = Image.new('RGBA', img.size, (255, 255, 255, 1)) | |
watermark.paste(logo, (offset_x, offset_y), mask=logo.split()[3]) | |
alpha = watermark.split()[3] | |
alpha = ImageEnhance.Brightness(alpha).enhance(opacity) | |
watermark.putalpha(alpha) | |
Image.composite(watermark, img, watermark).save(image_file, 'JPEG') |
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