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Re: Need help with DM42 pictures

Posted: Thu Mar 08, 2018 5:39 pm
by grsbanks
Jeff O. wrote:
Thu Mar 08, 2018 3:13 pm
So it is best to convert to grayscale before converting to 1-bit depth?
I don't honestly know, to be honest. I'm just used to doing things one step at a time. Kind of like the Unix philosophy where you have one tool to perform each intermediate task in a composite process instead of the Windows "one tool does everything including the kitchen sink" approach. Old habits die hard :)

Re: Need help with DM42 pictures

Posted: Thu Mar 08, 2018 10:02 pm
by mwthomasjr
grsbanks wrote:
Thu Mar 08, 2018 5:39 pm
Jeff O. wrote:
Thu Mar 08, 2018 3:13 pm
So it is best to convert to grayscale before converting to 1-bit depth?
I don't honestly know, to be honest. I'm just used to doing things one step at a time. Kind of like the Unix philosophy where you have one tool to perform each intermediate task in a composite process instead of the Windows "one tool does everything including the kitchen sink" approach. Old habits die hard :)
You should use the netpbm (or GraphicsMagick or ImageMagick...) command line utilities then :D

Re: A few to get you started

Posted: Fri Mar 09, 2018 12:54 am
by TalenPhillips
The way I made my album ( viewtopic.php?f=14&t=537 ) was with GIMP.

You can right-click copy an image from your browser, and crop, adjust brightnesses (including per color brightness), and convert to grayscale (gives a good idea of what the final image will look like), then scale.

To convert to 1-bit (with dithering), make sure you have an image that is already the correct size, and go through the following menus:
Image ⇒ Mode ⇒ Indexed ⇒ Use black and white (1-bit) pallette.
Then from the dropdown menu, select Floyd-Steinburg (normal) and click convert.

Done!