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I think this is exploiting image resizing algorithms, which are inaccurate because no matter how much better anyone should know, they never do the math in linea

I think this is exploiting image resizing algorithms, which are inaccurate because no matter how much better anyone should know, they never do the math in linear-light space so it always gets bright areas wrong. Every Photoshop filter does this wrong too.

hopfenspergerj 3y ago
You can squint and see the letters, so I’m assuming this isn’t it.
- qwertyforce 3y ago
  you can also take a few steps back from the screen, it works too
atleastoptimal 3y ago
I think it's more that the human eye is much more contrast sensitive when looking at low detail images, as highlighted in the einstein/monroe illusion https://psychologicalscience.blog.gustavus.edu/2022/05/10/einstein-monroe-illusion-a-two-for-one-image/ https://psychologicalscience.blog.gustavus.edu/2022/05/10/ei...
pengaru 3y ago
I don't think it takes doing anything wrong for diffuse spatial patterns to become well-defined when you substantially compress the space. What's dispersed across quite a few pixels in the full-size is now condensed into an easily discerned sharper edge of pixels. If I defocus my vision, kind of like when looking at those old "MagicEye" 3D-like images, I can see the words pretty well in the full-size... In the full-size there's a bunch of high-frequency noise (like building windows) interfering, but that's necessarily lost in the down-scaling, and now the low-frequency information forming the name is clearly visible.
bawolff 3y ago
> which are inaccurate because no matter how much better anyone should know, they never do the math in linear-light space so it always gets bright areas wrong. I dont think its that nobody knows, just that it doesn't matter too much and you can resize things much more efficiently with the incorrect algorithm (especially jpgs). I'm also doubtful that this is responsible for the effect
WithinReason 3y ago
The content doesn't have high contrast so no that's not it
cout 3y ago
I vaguely remember seeing effects that exploit resizing algorithms, but I do not think that is what is going on here. I can view the image full size on a high resolution monitor, walk to the other side of the room, and see the text clearly. It is also visible if I squint.

hopfenspergerj 3y ago

You can squint and see the letters, so I’m assuming this isn’t it.

qwertyforce 3y ago
you can also take a few steps back from the screen, it works too

atleastoptimal 3y ago

I think it's more that the human eye is much more contrast sensitive when looking at low detail images, as highlighted in the einstein/monroe illusion https://psychologicalscience.blog.gustavus.edu/2022/05/10/einstein-monroe-illusion-a-two-for-one-image/ https://psychologicalscience.blog.gustavus.edu/2022/05/10/ei...

pengaru 3y ago

I don't think it takes doing anything wrong for diffuse spatial patterns to become well-defined when you substantially compress the space. What's dispersed across quite a few pixels in the full-size is now condensed into an easily discerned sharper edge of pixels. If I defocus my vision, kind of like when looking at those old "MagicEye" 3D-like images, I can see the words pretty well in the full-size... In the full-size there's a bunch of high-frequency noise (like building windows) interfering, but that's necessarily lost in the down-scaling, and now the low-frequency information forming the name is clearly visible.

bawolff 3y ago

> which are inaccurate because no matter how much better anyone should know, they never do the math in linear-light space so it always gets bright areas wrong. I dont think its that nobody knows, just that it doesn't matter too much and you can resize things much more efficiently with the incorrect algorithm (especially jpgs). I'm also doubtful that this is responsible for the effect

WithinReason 3y ago

The content doesn't have high contrast so no that's not it

cout 3y ago

I vaguely remember seeing effects that exploit resizing algorithms, but I do not think that is what is going on here. I can view the image full size on a high resolution monitor, walk to the other side of the room, and see the text clearly. It is also visible if I squint.