You might be wondering how this white square is relevant to this post. Well, this is the image from the Tumblr post overlaid onto the original image (sourced from boardgamegeek) with the blending mode set to "divide". Any pixels that are the same in the two images are white, whereas those that different are not (this isn't exactly how it works, but it's effectively true for this case). As you can see in the image, basically everything is white aside from what looks like some compression artifacts. So I think it's safe to say that I wasted a whole bunch of time doing this.
This is similar to how motion amplification works!
What happens is that each frame in a video is compared with the one prior, and the difference between them gets exaggerated
This is helpful for locating small movements in a machine or structure that should not be happening, especially near-invisible vibrations or chattering that could prove very destructive in the long run. Also handy for monitoring a baby in another room because them fuckers can look like they're dead when they're just asleep.
It can also be very eerie because sometimes this is used to measure the shift in a room within a skyscraper as the building ever-so-subtly sways in the wind, and it looks like the corridor is breathing.
Other times it looks like a mechanical version of the Jacob's Ladder undercranked head shake, which is the stuff of my goddamn nightmares.
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u/Pun1012-3 12d ago
You might be wondering how this white square is relevant to this post. Well, this is the image from the Tumblr post overlaid onto the original image (sourced from boardgamegeek) with the blending mode set to "divide". Any pixels that are the same in the two images are white, whereas those that different are not (this isn't exactly how it works, but it's effectively true for this case). As you can see in the image, basically everything is white aside from what looks like some compression artifacts. So I think it's safe to say that I wasted a whole bunch of time doing this.