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> You can take TWO screenshots, moments apart, open in GIMP, paste one over the other and choose any one of these laying modes: You actually don't need any im

> You can take TWO screenshots, moments apart, open in GIMP, paste one over the other and choose any one of these laying modes: You actually don't need any image editing skill. Here is a browser-only solution: 1. Take two screenshots. 2. Open these screenshots in two separate tabs on your browser. 3. Switch between tabs very, very quickly (use CTRL-Tab) Source: tested on Firefox

milkshakes 1y ago
reminds me of this: https://www.reddit.com/r/LifeProTips/comments/5jdzsx/lpt_use_crosseyed_method_to_solve_spot_the/ https://www.reddit.com/r/LifeProTips/comments/5jdzsx/lpt_use...
- CGMthrowaway 1y ago
  I went cross-eyed on my screenshot, and I couldnt read the word, but I did notice some artifacts
- JadeNB 1y ago
  This was used in some early-20th-century astronomical setting, I think to detect supernovae. I can't find any documentation now, but my memory is that it was called "blink testing" or something similar, where one switched rapidly between two images of a star field so that changes due to a supernova would stand out.
  - rogerrogerr 1y ago
    https://en.m.wikipedia.org/wiki/Blink_comparator https://en.m.wikipedia.org/wiki/Blink_comparator
    - JadeNB 1y ago
      That's it exactly! Thanks.
azinman2 1y ago
You could also just record a video.
- jama211 1y ago
  Hah, indeed, that was my first thought. This is clearly for fun though, it’s a cool project idea
axiolite 1y ago
What does that accomplish? You can just read the web page as-is... Are you going to share your two screenshots, and provide those instructions, with others? That seems impractical. Video recording is a bit less impractical, but there you really need a short looping animation to avoid ballooning the file size. An actual readable screenshot has its advantages...
chinathrow 1y ago
> use CTRL-Tab Thank you forever for this, I ever used Ctrl-Page up/down for that.
Velocifyer 1y ago
Or use Blink Comparison from F-Droid.

milkshakes 1y ago

reminds me of this: https://www.reddit.com/r/LifeProTips/comments/5jdzsx/lpt_use_crosseyed_method_to_solve_spot_the/ https://www.reddit.com/r/LifeProTips/comments/5jdzsx/lpt_use...

CGMthrowaway 1y ago
I went cross-eyed on my screenshot, and I couldnt read the word, but I did notice some artifacts
JadeNB 1y ago
This was used in some early-20th-century astronomical setting, I think to detect supernovae. I can't find any documentation now, but my memory is that it was called "blink testing" or something similar, where one switched rapidly between two images of a star field so that changes due to a supernova would stand out.
- rogerrogerr 1y ago
  https://en.m.wikipedia.org/wiki/Blink_comparator https://en.m.wikipedia.org/wiki/Blink_comparator
  - JadeNB 1y ago
    That's it exactly! Thanks.

azinman2 1y ago

You could also just record a video.

jama211 1y ago
Hah, indeed, that was my first thought. This is clearly for fun though, it’s a cool project idea

axiolite 1y ago

What does that accomplish? You can just read the web page as-is... Are you going to share your two screenshots, and provide those instructions, with others? That seems impractical. Video recording is a bit less impractical, but there you really need a short looping animation to avoid ballooning the file size. An actual readable screenshot has its advantages...

chinathrow 1y ago

> use CTRL-Tab Thank you forever for this, I ever used Ctrl-Page up/down for that.

Velocifyer 1y ago

Or use Blink Comparison from F-Droid.