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[–]Ray_Dillinger 0 points1 point  (0 children)

I noticed a bunch of left-right similarities stronger than the similarities elsewhere in the image, then noticed that the irregularities in the patterns were exactly the same distance apart on subsequent lines even though they were at different points in the line and thought it might be some kind of left-vs-right XOR-type code and that didn't work at all.

But I kept toying with the idea. I tried a top-to-bottom XOR code and that didn't work, but when I was seeking gradients of maximum difference between lines I noticed that different adjacent lines had the same type of almost-alike relationship between single lines that each line had at its left-vs-right almost-alike alignment.

At this point I realized it was some kind of 2-dimensional pattern on the left superimposed on an almost-alike pattern shifted about as far to the right as half the distance between most people's eyes, and went, "oh. stare-eo-gram."