# Decoding Secret Messages from Space!

This instructable shows my attempts at decoding secret messages from space . . . in the form of Fourier transformations of supercluster photos. Lemme explain.

I was reading through my Digital Image Processing book (2nd edition) about something called Fourier transforms. Without explaining the math, suffice it to say that any 2d image can be transformed into a mathematical representation called the Fourier domain. When you do a Fourier transform on a normal image, you get what looks like a cluster of stars. So me being me, I thought, what do you get if you do a Fourier transform on a picture of a cluster of stars? SECRET MESSAGES FROM SPACE!?

If you appreciate this instructible, please visit my blog for more ideas:
GoodCleanCrazy

Resources:
1. Image editing software that is capable of Fourier transformation (I'm sure there's a free astronomy tool out there SOMEWHERE)
2. Photos of objects in space (like nebulae)

## Step 1: Find a Good Candidate Photo

First you must find a likely source of alien messages from space. Find a supercluster photo with a bright spot in the very center, crop or resize it to 512x512 pixels. Many Messier objects are good candidates.
TheGoodLife5 years ago
I feel a little upset after decoding a wide-field image.

Message read "Get a life Earthling".
iectyx3c5 years ago
I like the "me being me" idea. And I think the creativity of seeing the similarity of star clusters to Fourier transforms is great. Now here is my research question: mask out a portion of the original star cluster, say by overlaying it with the letter "R" (R is good because it shows rotation and reversal). Now run your plugin. What effect can you see?
royalestel (author)  iectyx3c5 years ago
Well, let me answer your question a different way. If you Fast Fourier Transform (FFT) a checkerboard, then overlay it with the letter R, and then perform another FFT, you'll get a Fourier pattern with a checkboard overlaid.

Perform another FFT and you get a Fourier pattern with two R's overlaid, one rotated 180 degrees. That double imaged R rotated is part of the problem of using the same image to represent the real and "imaginary" portion of the FFT image, but it gets you close and is usually interpretable.
mrmath5 years ago
Now we can save all that money that's being wasted on SETI!
5 years ago
PS: That was a joke, not an insult to the idea or execution of this instructable.
royalestel (author)  mrmath5 years ago
Yah, yah. Well, SETI fine for a screen saver, but I don't realy think it's a worthwhile venture m'self . . .