Random-Dot Stereogram QSL Card

Traditional QSL cards are unfortunately falling out of favor among many hams … so how about an UNconventional card … one that offers a 3D image if you look at it just right?

PAUL SIGNORELLI

The random-dot stereogram has been a popular art curiosity for a long time. You might know it as “The Magic Eye.“ You can make your own random-dot stereogram QSL card by using do-it-yourself web sites like: . My QSL card is shown in Photo A. Can you see it? The size of the card you are viewing will affect the ease of viewing. Most people can view them without special viewing glasses. Here’s how to do it: You have to fuse the two dots at the bottom so that your brain sees three dots. The best way is not to cross your eyes but look at infinity. Not being able to see it straight away is what makes it interesting. It is like steganography (hiding secret messages inside an ordinary…

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CQ Amateur Radio (Digital) - 1 Issue, September 2023

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