Paint Dot Net Tutorial: Put Letters in an Image That Are Difficult for A Computer to Read But Easy for a Human. Kinda Like Crypto But Not Really That Secure.

https://www.getpaint.net/

Start with a Complex Image with many Edges Between Colors.
You May Use This One...

Select Large Bold Letters

OR... IF YOU WANT TO BE REALLY CRYPTO
USE SMALL NOT-BOLD LETTERS
THEY MAKE IT ALMOST IMPOSSIBLE FOR
A COMPUTER TO READ...

In a New Layer Say what You Have to Say...

Use the Magic Wand Tool to Select the Letters
(in Global Flood Mode)

Switch to Background Layer
Copy [Ctrl + C]

Paste into a New Layer [Ctrl + Shift + V]

Invert Colors [Ctrl + Shift + I]

Flatten Image
[Ctrl + Shift + F]
and Save as JPG
[Ctrl + Shift + S]
Use a NON Descriptive file name such as:
Untitled.jpg or Kids at the Beach.jpg


This Image Is Almost Impossible for 
a Computer to Read... 
but a Human CAN... 

It Says: 
"Shut Down the Hambach Forest Coal Mine in Germany"

~~~~~~~~~~~~~~~~~~~~~

and then we come to Wingdings...
They allow anyone to encipher
letters and put them in an image.

Need a Complex image?
Here are some...