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Old 09-09-2022, 07:57 PM   #1
Skaperen
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grayscale to 2-tone random dots


there is a method to convert grayscale to two-tone (e.g. black and white) using randomly placed dots, modified to have darker and lighter areas, using dots all exactly the same size and color on a background of the same color (opposite of the dot color).

here is an example result of this method (731,903 bytes 1920x1080 HD/2K)
http://ipal.net/dots.gif

does anyone know what this method is named?
 
Old 09-13-2022, 11:02 AM   #2
rnturn
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Quote:
Originally Posted by Skaperen View Post
there is a method to convert grayscale to two-tone (e.g. black and white) using randomly placed dots, modified to have darker and lighter areas, using dots all exactly the same size and color on a background of the same color (opposite of the dot color).

here is an example result of this method (731,903 bytes 1920x1080 HD/2K)
http://ipal.net/dots.gif

does anyone know what this method is named?
Dithering? See this page for an example of what I think you're referring to. I remember the Wall Street Journal using this to render images of whoever was being featured in some page 1 article.
 
Old 09-14-2022, 06:21 AM   #3
John VV
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Dithering is built in to Gimp , it is under
Color/Dither
 
Old 09-14-2022, 11:00 AM   #4
mjolnir
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There used to be a website that featured old time technology that let you select a version with dithered images for those with a slow internet connection, can't remember the name off-hand.

Edit: Lowtechmagazine dot com

Last edited by mjolnir; 09-14-2022 at 11:06 AM.
 
Old 09-14-2022, 12:44 PM   #5
Skaperen
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Quote:
Originally Posted by rnturn View Post
Dithering? See this page for an example of what I think you're referring to. I remember the Wall Street Journal using this to render images of whoever was being featured in some page 1 article.
Yes! that's the name. i bet a search on that word will find tons of results. having the correct name helps a lot. thanks rnturn!
 
  


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