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Converting to 1-bit

Posted: Mon Dec 02, 2019 8:57 pm
by BestofTimes
What tools have you found useful to convert images to 1-bit bitmaps?

I've used Photoshop’s Diffusion Dither option to switch greyscale files to bitmaps but the results can sometimes be a bit hit and miss. What do you guys use?

Re: Converting to 1-bit

Posted: Mon Dec 02, 2019 10:29 pm
by toml_12953
BestofTimes wrote:
Mon Dec 02, 2019 8:57 pm
What tools have you found useful to convert images to 1-bit bitmaps?

I've used Photoshop’s Diffusion Dither option to switch greyscale files to bitmaps but the results can sometimes be a bit hit and miss. What do you guys use?
I use GIMP for Windows

Re: Converting to 1-bit

Posted: Tue Dec 03, 2019 12:07 am
by tgray
Photoshop for initial cropping and then a python script I wrote for the mono conversion and final dithering.

I always loved the way Atkinson dithering looked. It reminds me of being a kid and playing on the classic Macs at my dad’s work. So I implemented it for myself when I got a DM42. Fun learning project.

My code is here for anybody who wants it:
https://github.com/tgray/hyperdither

Re: Converting to 1-bit

Posted: Tue Dec 03, 2019 5:37 am
by Thomas Okken
I like the pgmtopbm tool from the Netpbm suite. The Netpbm suite is extremely old-school, it's a bunch of command-line tools, but well worth the time to familiarize yourself with.

Re: Converting to 1-bit

Posted: Wed Dec 04, 2019 5:48 pm
by BestofTimes
I found the best results in an old copy of Paint Shop Pro at work using these settings.

Image