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I've acquired a new superpower

danielwirtz.com

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Re: I've acquired a new superpower

#161

Post by jeffhuys »

nayuki wrote: post #68

I discovered this trick independently about a decade ago, to use cross-eyed viewing to easily spot differences between two similar images. Like you said, the parts that mismatch appear to shimmer and be unstable, making them obvious. However, I feel eye strain from doing it, so I prefer other methods. 99% of the time, I do https://en.wikipedia.org/wiki/Blink_comparator instead, just switching between two images with…

To reduce eye strain, don’t cross your eyes, but relax them (so, the other way). Instantly clear and snaps together as if magnetic.

Re: I've acquired a new superpower

#162

Post by soperj »

Any recommendations for when you can't get the images to quite overlap? I feel like I can get 75% of the way there, but then they start going the other direction. I can do magic eye easily.

Re: I've acquired a new superpower

#163

Post by jasperry »

Claims have been made (outside the medical mainstream) that regularly practicing crossing your eyes helps stave off presbyopia. One does get better at seeing stereograms with practice, so it seems like it at least improves some type of muscle control.

Re: I've acquired a new superpower

#164

Post by hk__2 »

jeffhuys wrote: post #149
soco wrote: post #65

Earlier quoted context omitted.

I can't overlap the images to save my life - they get like halfway there and that's it...

Don’t CROSS them. Relax them, like you’re tired and can’t focus on a computer screen.

There are two methods, either you cross them either you do like you’re describing.

Re: I've acquired a new superpower

#165

Post by KPGv2 »

rwmj wrote: post #123
soco wrote: post #65

Earlier quoted context omitted.

I can't overlap the images to save my life - they get like halfway there and that's it...

I spent far too much time as a twenty-something generating autostereograms, which seems to have trained my eyes. I was able to "cross" the images on this page very quickly.

NB autostereograms require you to move your eyes away from each other, the opposite of crossing them. To put it another way, crossing your eyes is what your eyes do when you're looking at something close to you, while the opposite is when you're looking far away.

Which is why for ASGs people advise you to look past the picture. Or why you bring the pic close to your eyes (so close that you basically have no choice but to look beyond the picture)

Re: I've acquired a new superpower

#166

Post by nullbyte »

My Piano teacher used to have this book on her coffee table with images like this. You could blur and cross your eyes, and the image would combine to become 3D.

But I never knew this technique could be used to spot the difference between images. Very cool discovery!

Re: I've acquired a new superpower

#167

Post by haswell »

Fnoord wrote: post #108
f0e4c2f7 wrote: post #93

Front page of HN. Funny to imagine thousands of people sitting in the office crossing their eyes at their computer screen right now.

All it did was hurt my eyes. I'll opt out of playing, superpower be damned.

I think the key is not "going cross-eyed" as much as it is relaxing your focus until the images merge. If you intentionally cross your eyes, it hurts. If you de-focus/relax your eyes until the images merge, it doesn't hurt.

Re: I've acquired a new superpower

#169

Post by jeffhuys »

satvikpendem wrote: post #4

Note that there is a difference between crossview and parallel view. See this image [0] and try to overlap them. Depending on what you see in the foreground, that is the type of view you're able to see. Basically, it determines whether the 3D view you're seeing from the stereoscopic pair is convex (pops out of the page) or concave (goes into the page). It is of course possible to learn both views but most people natu…

I can do both pretty comfortably, but there’s a definite bias to parallel, way easier for me.

Re: I've acquired a new superpower

#170

Post by arka2147483647 »

jeffhuys wrote: post #149
soco wrote: post #65

Earlier quoted context omitted.

I can't overlap the images to save my life - they get like halfway there and that's it...

Don’t CROSS them. Relax them, like you’re tired and can’t focus on a computer screen.

You can actually do it both ways, but which is easiest for whom is different.
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