When I look at it, the very first thing I see is the sharply-delineated fuzzy region at the left. It looks as if it is something rather than (as it were) mere blurriness in the gaps between other things. There isn’t any specific wrong thing my brain wants to think of the image as showing, but when I first looked at it it took something like half a second to figure out what I was looking at.
I’m not sure I’d call it almost like an optical illusion, though.
well, the first time I saw an ameboid star, and then very shortly I saw an invasive (where I live) oak’s sapling. I’d say it’s not an OI, it just makes you search for the focus of the image. The classic example Lumifer links to is something where you might not even think of looking for the other image; and of course, there should be ambiguity things nearer to crystal clear end of spectrum.
When I look at it, the very first thing I see is the sharply-delineated fuzzy region at the left. It looks as if it is something rather than (as it were) mere blurriness in the gaps between other things. There isn’t any specific wrong thing my brain wants to think of the image as showing, but when I first looked at it it took something like half a second to figure out what I was looking at.
I’m not sure I’d call it almost like an optical illusion, though.
well, the first time I saw an ameboid star, and then very shortly I saw an invasive (where I live) oak’s sapling. I’d say it’s not an OI, it just makes you search for the focus of the image. The classic example Lumifer links to is something where you might not even think of looking for the other image; and of course, there should be ambiguity things nearer to crystal clear end of spectrum.