Add Your Watermark on a Photo using Python

Introduction

You may have noticed many images are watermarked(owner name, brand name, date, etc.) by the creator. It gives a professional look. Not only that, it also represents their intellectual properties.

You can easily add a watermark to a photo using some tools online or offline.

But did you know that the same thing can be done using a few lines of python code? Sounds great, right?

In this tutorial, we will talk about how to Add a Watermark on a Photo using Python. We’re gonna use pillow module here, to perform this task.

So, Before we get started, let’s take a look at what we’ve to install.

Requirements

Use pip3 instead of pip for Linux.

from PIL import Image, ImageDraw, ImageFont

img = Image.open('girl_image.jpg')
# Getting the height and width of the image
width, height = img.size

draw = ImageDraw.Draw(img)
text = "PySeek"

# ********For Ubuntu*********
#font = ImageFont.truetype('Ubuntu-M.ttf', 45)

# ********Default Font*******
# *****Work for everyone*****
# font = ImageFont.load_default()

# **********For Windows*********
font = ImageFont.truetype('arial.ttf', 45)


textwidth, textheight = draw.textsize(text, font)

x = width - textwidth - 10
y = height - textheight - 15

draw.text((x,y), text, font=font)

# Saving the image
img.save('watermarked.jpg')

# Open the image
img = Image.open('watermarked.jpg')
img.show()

Output

Important note for Linux User

If you run this code on a Linux system then, you may get an error message like this.

Traceback (most recent call last):
File “image_watermark.py”, line 18, in <module>
font = ImageFont.truetype(‘arial.ttf’, 45)
File “/usr/lib/python3/dist-packages/PIL/ImageFont.py”, line 642, in truetype
return freetype(font)
File “/usr/lib/python3/dist-packages/PIL/ImageFont.py”, line 639, in freetype
return FreeTypeFont(font, size, index, encoding, layout_engine)
File “/usr/lib/python3/dist-packages/PIL/ImageFont.py”, line 187, in __init__
self.font = core.getfont(
OSError: cannot open resource

To avoid this error, use the default font or Linux Font. 

To find where the Linux fonts is present, simply run this command: ‘locate *.ttf‘ on the terminal. 

I’ve commented two lines in the code. If your Linux distribution is Ubuntu then use that.

Ubuntu Font folder looks like this.

Ubuntu Font Folder

Add a Logo(or Image Watermark) to an Image

We added a text watermark on a photo successfully. Let’s try to add a logo to an image now. In this case, you need to create a perfect-size logo previously. Next, you need to mention the path and size(see the yellow marked line) of it to the program before pasting it.

The rest of the steps are the same, as mentioned above.

In my case, I made a python logo(‘logo.png‘) before. You can try something else too.

The Code

from PIL import Image

img = Image.open('girl_image.jpg')
# Getting the height and width of the image
width, height = img.size

size = (100, 100)
logo = Image.open('logo.png')
# You can use resize method here instead of 
# thumbnail method
logo.thumbnail(size)

# Location where we want to paste it on the
# main image
x = width - 100 - 10
y = height - 100 - 15

img.paste(logo, (x, y))
# Save the image
img.save('image_with_logo.jpg')

# Opening the new image
img = Image.open('image_with_logo.jpg')
img.show()

Output