I Asked ChatGPT to Create Simple Image Processing Code

I scanned a hand-drawn picture, but I don't have any good image editing software, so I can't edit it...
For people like me, here's a way to create Python code for image editing using ChatGPT.
This time, I'll use the method I used to create the icon image for this site as an example.

What Image Editing Operation Are We Trying to Do This Time?

We'll use the task of inverting the black-and-white colors of a hand-drawn picture and making the originally white parts transparent.
This is what I actually did to create the icon image for this site.

How Did You Ask ChatGPT?

I asked like this:

Please create Python code using Pillow to perform the following processing.

# Processing
1. Load the image (icon_black.png) and define it as a.
2. Binarize a using a threshold of 150 for brightness and define it as b.
3. Invert the black-and-white colors of b and define it as c.
4. Change the black areas in c to transparent and define it as d.
5. Output d as icon_white.png.

Then, it returned working code in one request.
Here is the conversation we had.
Writing Japanese that conveys the image of the program increases accuracy.

from PIL import Image

# Load the image
a = Image.open("icon_black.png")

# Binarize the image
b = a.convert("L").point(lambda x: 255 if x > 150 else 0, mode='1')

# Invert the black-and-white colors
c = Image.eval(b, lambda x: 255 - x)

# Change the black areas to transparent
d = c.convert("RGBA")
data = d.getdata()
new_data = []
for item in data:
    # Change the black areas to transparent
    if item[0] == 0 and item[1] == 0 and item[2] == 0:
        new_data.append((255, 255, 255, 0))
    else:
        new_data.append(item)
d.putdata(new_data)

# Output the image
d.save("icon_white.png")

But what if you don't know terms like brightness or binarization?
I think I'll write an article for those people in the future.

Side Note

I once used a paid image processing software for work because I had to, and I remember that almost everything could be implemented quickly with Python.
Knowing the terms and implementation can save you quite a bit!

Summary

For those who don't have good image editing software, I introduced a method to create Python code for image editing using ChatGPT.
I hope it serves as a reference for someone.