Yesterday I had a little idea about creating a captcha.
The essence of the idea is as follows.
There is a table:
 | Brick |
 | Phone |
 | Elephant |
 | Table |
 | Chair |
It should have an image of the object and its name, and the objects should be simple. So that when you see an image of an object, only one version of its name appears in your mind.
But actually the idea itself.
4 random images from this table are selected and a square is made from them. Square cells are assigned symbols (according to the “marking” principle of a chessboard).
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In this case, you must enter the "Table"
Alternatively, you can make a 3x3 square.
Waiting for your comments.